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Author Topic: LML Silverado Duramax C-Max build thread part 4  (Read 69871 times)

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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #900 on: January 02, 2018, 07:33:39 PM »
Yeah hose connections leak during winter, the rubber shrinks. That connection doesn't have a clamp tho, correct? Just a plastic ring? Might have disturbed it when you installed the drain...

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 I went deer hunting today and was sweating my rear off by 10:00 in just a t-shirt

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Lower radiator hose with the cast in "T"

My money says the leak, if you want to call it that, is uphill of that a bit, just collecting on that junction. although I can't prove that with evidence.

About the super cold temps.

Over the life of the truck, about 99% of the problems I have encountered all occur during radical dips in ambient temp.

So I'm not going to loose any sleep over this issue.
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Offline stlaser

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #901 on: January 02, 2018, 08:37:23 PM »
Good deal, we all know you old guys need your beauty rest......  :likebutton:
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Offline JR

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #902 on: January 02, 2018, 09:12:00 PM »
I think that is part of the $200 house that is a bear to change!
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Offline Sammconn

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #903 on: January 02, 2018, 11:04:36 PM »
Don, that $200 piece of junk will do that.
It's a terrible design, I have one new in box of truck.
Mine started leaking again...sometime back the first dip to -20 or so.
I'm currently hoping to make it till next summer to replace it again.
Then I may do some 'research' if barbed fittings and clamps will work.

It's a real PITA to change as the moulded junk connectors don't like to fit through the small spaces they need to go through. Best done on a warm day. The clamp up at the water pump sucks to get to also.
I just don't want to wind up missing a digit or limb.  I can sometimes get in a hurry to get results.
Sam

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #904 on: January 02, 2018, 11:23:25 PM »
Sounds like we need to get a write up on this going.  I am sure mine will start leaking too after getting back here to the cold weather


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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #905 on: January 03, 2018, 01:54:52 AM »
Don, that $200 piece of junk will do that.
It's a terrible design, I have one new in box of truck.
I think that is part of the $200 house that is a bear to change!


Haha, I was going to chime in about the price of that hose, too! :)


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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #906 on: January 03, 2018, 11:14:42 AM »
Didn't know we were on to something

OK, I'll get to it and figure out what to do next.

I'm almost dreading it, but time to go outside and see if old C-Max leaked any last night. I did however plug in the block heater...

Let you know in a jiffy...
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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #907 on: January 03, 2018, 12:17:46 PM »
OK, still leaking:
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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #908 on: January 03, 2018, 12:21:52 PM »
Notice the hose junction in the blurry picture.

Second vertical line.

I cannot with any certainty ascertain if the "T" junction is the only leak

or

If the new vertical line has migrated onto the top of the "T" creating the appearance of that vulcanized, funky transition simply being a collection point for a drip.

But I can see what is uphill from that, and that would be a hose clamp.

So,

for my next act, I think I'll snug that critter up and scrape a bit more skin off my good hand.
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #909 on: January 03, 2018, 02:31:06 PM »
Toss some parts cleaner on it and dry it off really well than apply a form of white powered or flower to he area. Should help visually to see if the leak is coming from higher up. 

Not sure if this is new knowledge but it has worked for me.


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Offline EL TATE

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #910 on: January 03, 2018, 04:22:28 PM »
That's a great old school trick right there Dave, wish I had thought of that a long time ago. I was "mystery leaking" in the wife's Yukon, only after running down the hwy and never when parked. I could see water marks down the block and assumed water pump, but borrowed this guy from a buddy at work, https://www.harborfreight.com/radiator-pressure-tester-kit-63862.html and found it was the passenger side gasket had been installed without RTV. I replaced the pump anyway since it had 70k on it, but the pressure tester was 100% accurate.
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Offline Sammconn

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #911 on: January 03, 2018, 06:07:29 PM »
My bet is on the tee junction. My OEM hose was really stuck on good.

It may well be the clamp joint too.
That's the one you'll loosen to remove said hose...
I just don't want to wind up missing a digit or limb.  I can sometimes get in a hurry to get results.
Sam

Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #912 on: January 03, 2018, 08:16:37 PM »
OK, so I tightened up the clamp up at the water pump outlet. (Inlet)
That clamp was pretty loose. That may well have been the culprit. I have never put a wrench on that worm gear, so maybe over the past six years it has loosened that much.

I took it to the truck wash, where they did the chem clean thing to the UC, then drove about fetching lumber for the next project, then drove it home. Hours later, there is not a spot on the driveway. Not taking any bets just yet, but so far so good.

Oh, and the tires continue to ride very well!
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #913 on: January 03, 2018, 10:41:50 PM »
So two days ago you were done with them and wanted to return to Toyo tires.   What?s the verdict ? You rotated them was all?


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Offline TexasRedNeck

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #914 on: January 04, 2018, 08:28:25 AM »
So two days ago you were done with them and wanted to return to Toyo tires.   What?s the verdict ? You rotated them was all?


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D rated tires just aren't made to handle a 10k lb+ truck Don.
They would probably work great on Shawn's Jeep
tho.

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On the tires: Good news!

I must have had one bad one, and it must have been the right rear.

Reason, that is the tire that is currently hanging on the spare carrier and my truck drives completely normally. Now I am not saying that the issue may not reappear, but I am saying that I drove the truck down to the farm 50+ miles pulling the trailer with the outhouse strapped to it (What #3,500 ish??) and back at 45-60MPH and encountered no vibration at all. I had no steering wheel shimmy and with regard to the steering, it was greatly improved. Not much crown on these narrow country roads to speak of and for 75% of the distance there you cannot keep the steering wheel still less than 2 seconds. No exaggeration, the roads are literally constant turns most of the way there! Point with all that being that there is no way to check to see if it wanders following the crown just yet.
If I could keep this ride, these tires would do their job and get me through another year and then I'd upgrade to the "E" rated tires which hopefully, then, I could easily pay for.

yup rotated
Kids today don't know how easy they have it. When I was young, I had to walk 9 feet through shag carpet to change the TV channel.

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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #915 on: January 14, 2018, 08:01:40 PM »
And to report a bit further along, the vibration ans wheel shimmy is still gone. I think we may have gotten the rascally rabbit!

Truck is driving along just fine and working offroad well in the winter mud/ice stuff.
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #916 on: January 14, 2018, 08:24:01 PM »
Still no leak from the lower rad hose?


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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #917 on: January 15, 2018, 10:33:06 AM »
Still no leak from the lower rad hose?


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Dave,
It showed a spot one day, then it hasn't since then.
I stopped checking the past few days since the garage has some wet spots on the floor, and it would be hard to determine.
The problem does seem to be related and proportional to the cold.
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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #918 on: March 02, 2018, 07:08:38 PM »
The truck is beginning to show its age, so today I started to do something about it. The thing is running great and just under 90K, but the paint is a bit dull and those letters have been on there long enough.

So off they came and I buffed out part of the topper to see if the finish was restorable or just in need of a top coat. The former was the answer and I got a clue as to what the thing will look like with a bit of mechanical shinin'
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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #919 on: March 02, 2018, 07:11:45 PM »
Now I went and did it!

Made a couple of areas shiny, so I guess I'll have to complete the operation.

I am thinking about a repaint of the front and rear bumpers, and I keep wanting to paint the wheels a shiney steel gray, like the color of the wife's GJ. I'd likely chase that by painting the chrome on the grill the same dark metallic gray and maybe flat black the top of the hood to reduce glare...

Just thinkin here folks, so let's not go too crazie!
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Offline stlaser

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #920 on: March 02, 2018, 07:22:51 PM »
Is that where sq d used to reside? Wondering if they just swapped places and the old girl was put out to pasture (aka mulch bed)?
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Offline JR

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #921 on: March 02, 2018, 07:36:31 PM »
Looking good. Guess the knee is better?
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #922 on: March 02, 2018, 08:41:07 PM »
I think these are my next investment, keep the water and salt from going in places it doesn?t need to.  Might help you out

https://www.cjponyparts.com/general-motors-wheelhouse-liner-rear-pair-chevrolet-silverado-2016-2018/p/84154470/


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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #923 on: March 02, 2018, 10:37:50 PM »
Is that where sq d used to reside? Wondering if they just swapped places and the old girl was put out to pasture (aka mulch bed)?
SquareD is still over at the repair shop. I am awaiting a sizeable check to show up...If it does, I'll let them dig back into the thing and fix what they found. If it doesn't in a month, then I'll bring it home.
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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #924 on: March 02, 2018, 10:40:10 PM »
Looking good. Guess the knee is better?
It is slowly healing. I can motor around now

Today is the first day, I put actual work on it and not just riding around in the cab of something I own.
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #925 on: March 02, 2018, 11:12:40 PM »
I think these are my next investment, keep the water and salt from going in places it doesn?t need to.  Might help you out

https://www.cjponyparts.com/general-motors-wheelhouse-liner-rear-pair-chevrolet-silverado-2016-2018/p/84154470/


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I need some of those now, too. But check the link Dave - says they?re for 2016+.


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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #926 on: March 03, 2018, 12:16:42 AM »
I do believe you can get them for many different years, I just pulled a fast gooogle search for reference


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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #927 on: March 03, 2018, 12:27:05 AM »
Gotcha :). Yes, can get them for other years, and the ones for the 1500s fit our trucks.


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Offline JR

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #928 on: March 03, 2018, 12:50:09 PM »
Cool, need them for my 06 also.
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #929 on: March 03, 2018, 01:10:21 PM »
Did some searching last night - ruggedliner seems to be the way to go - wwc99 for the classic 01-07 trucks.


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Offline TexasRedNeck

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #930 on: March 03, 2018, 01:13:39 PM »
glad your knee is getting better Don.

I'm hanging a bit of hardie today. Gotta get the outside wrapped up
Kids today don't know how easy they have it. When I was young, I had to walk 9 feet through shag carpet to change the TV channel.

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Offline JR

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #931 on: March 03, 2018, 07:56:22 PM »
Did some searching last night - ruggedliner seems to be the way to go - wwc99 for the classic 01-07 trucks.


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Sweet and there $30 cheaper!!
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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #932 on: March 03, 2018, 08:06:53 PM »
glad your knee is getting better Don.

I'm hanging a bit of hardie today. Gotta get the outside wrapped up
Its as stiff as a pine board, but I can move about slowly...Pretty much all I need, as before the operation, I was moving about slowly! ;-))
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Offline JR

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #933 on: March 03, 2018, 10:44:50 PM »
Oh boy do I know that feeling. Dr said my knee is sprang and I can agree as it is stiff. Weight on it is not issue. However the stabbing pain that goes down the leg is killing me, and really just when I lay down so sleep is suffering big time right now.
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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #934 on: March 04, 2018, 09:32:20 AM »
Oh boy do I know that feeling. Dr said my knee is sprang and I can agree as it is stiff. Weight on it is not issue. However the stabbing pain that goes down the leg is killing me, and really just when I lay down so sleep is suffering big time right now.
Hate that!

I just suck it up and drive on...Best we can do my friend!
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Offline JR

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #935 on: March 04, 2018, 09:43:30 PM »
Thx Don. Worse part is trying to sleep.
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Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #936 on: March 18, 2018, 06:59:07 PM »
Truck sitting a wee bit under 90K is running great. The tires have settled down completely and although there are wearing just like my patience during an Obama speech, they are smooth and give great traction. Keep in mind I am in 3"-6" deep mud on long greasy slopes once a week. They occasionally spin, but not often. They do some side slippin', more than I like, but I haven't slipped off the edge of the world yet, so I'm basically satisfied with them.

The mileage continues to be good. And this is in the third setting, not the high mileage #1 position.
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #937 on: March 21, 2018, 01:28:41 PM »
I am finding labor prices pretty much eclipising $100 an hour everywhere. That's great for a guy like me who is considering taking on smallish land clearing jobs. I'd come in at around $100-$150 an hour with a minimum 5 hour charge to do something.

But focusing more on the automotive labor market, and using my recent experiences as a measure, people aren't getting a lot anymore for their hard earned dime.

Recognizing that great businesses like Ken's fight an uphill battle of labor costs, hidden costs, taxes, insurance, environmental surcharges and so forth, guys like him blend all that and still try to stay above the water.


Talking to the diesel mechs I had do the work on SquareD, who I believe to be really good mechanics, informed me that the CP4.2 pump in my Duramax is a ticking time bomb. They offered to replace it for $5,000

That got me thinking. First, the Duramax is my primary vehicle I use for everything. I really can't afford for it to cave in with no notice. So I was pricing CP3 pump conversions. Industrial injection has a kit with pump around $2,000, and a good Whirli unit for a bit more.

A very basic pure stock CP3 unit can be had for as little as $1600, and I'll bet I wasn't going to get much more than that for the $5K.

Then knowing these guys would have to pull the body off the frame to get the job done, I watched a couple films of a guy at Industrial injection actually do the complete conversion. Well, he did it with the body on. Removed the turbo and about everything, but just worked overhead like everyone else.

You know, for $2K I could do that and still be able to add another turbo for the $5K the mechanics wanted...

Yea, I'm thinking again...
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Offline JR

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #938 on: March 21, 2018, 02:16:29 PM »
Hopefully your lift pump will add a little life the CP. That is another reason I did mine.

Mine is my DD also, right now a kid taxi and I get to use it a little.

$2k for a kit sounds great but I don't see the need to pull the cab. I don't think it is timed, just a pump and comes off straight up.
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #939 on: March 21, 2018, 02:48:39 PM »
The reality is these diesels have gotten to the place where they are just too expensive for the average joe. One thing if you can bill the cost out monthly but to just pull a trailer once every month or two I just don?t see it.
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #940 on: March 21, 2018, 04:10:25 PM »
I hear you Shawn, but you get hooked on the power and the mileage easily. As long as they run good, no issues. (knock on wood)

That pump is what I will have into the cummins I have once running.
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #941 on: March 21, 2018, 04:42:48 PM »
The other thing is ten / fifteen years ago the gasser v8?s made 300 hp in the hd pickups. At this point that?s a V6 output number. So I think you?re a lot of money ahead in a hd gas version with decent hp / torque figures.
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #942 on: March 21, 2018, 05:49:54 PM »
A 1/2 ton 5.3 would be fine for around town/highway. But the 10mpg 6.2/8.1 is not great.
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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #943 on: March 21, 2018, 06:17:26 PM »
Don. Worry about something else.  Plenty of 500,000 mile LMLs out there.  The exploding CP4 is overhyped


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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #944 on: March 21, 2018, 08:57:33 PM »
I think you should come on up to industrial injection and visit utah! 


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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #945 on: March 22, 2018, 02:35:10 AM »
Don. Worry about something else.  Plenty of 500,000 mile LMLs out there.  The exploding CP4 is overhyped


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But how many are truly on modified lml's?
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Offline TexasRedNeck

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #946 on: March 22, 2018, 07:59:42 AM »
Plenty of tuned deleted ones. I don?t consider modified to be emissions delete and tunes

He?s only running the mild tunes anyway and not calling on the pump for that much extra fuel.


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Offline Bear9350

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #947 on: March 22, 2018, 08:32:50 AM »
And running a lift pump besides to help it out I think right?  I don't think the LML cp4 is like the LB7 injectors where you know they are going to go it is just a matter of time and miles before they do.  Remember when reading on those forums the small percentage of people posting about those types of problems can be a lot louder then the majority of people that aren't having any issues and never have a need to post.  The only thing that had me thinking about swapping to a cp3 when I had my LML was that a cp4 failure could take out stuff down line and cost a whole heck of a lot more to fix then just the swap.

Offline Flyin6

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #948 on: March 22, 2018, 10:27:20 AM »
And running a lift pump besides to help it out I think right?  I don't think the LML cp4 is like the LB7 injectors where you know they are going to go it is just a matter of time and miles before they do.  Remember when reading on those forums the small percentage of people posting about those types of problems can be a lot louder then the majority of people that aren't having any issues and never have a need to post.  The only thing that had me thinking about swapping to a cp3 when I had my LML was that a cp4 failure could take out stuff down line and cost a whole heck of a lot more to fix then just the swap.
That is a large part of it for me as well
The loss of the CP4.2 means the loss of the injectors, a massive removal and cleaning of the entire fuel system. The return line pushing contaminated fuel back into the tank would call for a removal and cleaning of that, as well as the lines and perhaps of the lift pump as well.

I think the amount of labor to make all that right, along with the prospect of possibly a follow on failure due to a missed metal shard impinging a replacement injector begins to speak of a nightmarish scenario of thousands of wasted dollars.

Now about the power, and how I use it.

I purposely use lower settings because I know of the limits of the Allison.

In a perfect world of no financial constraints, I would replace the Ally and converter with something designed to hold 800 HP. I would use a better primary turbo and perhaps a low pressure turbo as well, and a modified CP# capable of supporting a more agressive tune. I would likely install head studs and/or other pieces of insurance to keep it all safe and secure

Why you ask?

I have long wanted to add a bit more structure to the front end to push away trees (or cars) that I seem to be encountering. I wold like to upgrade to a 16.5K winch, and add a 10K winch to the back end. I'd like to add a couple skip plates and a roof rack and one or two well designed roll bar loops to the exterior as a part of that roof rack.

Adding that extra 1500 lbs or more would slow the truck down a lot. 8700 (current weight) + 1,500 = 10,200 which would need a bunch more HP just to be able to run around (then) like it does now.

And that is why I'd like to add more HP/torque.
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Offline stlaser

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Re: LML Silverado Duramax C-Max build thread part 4
« Reply #949 on: March 22, 2018, 11:10:50 AM »
And running a lift pump besides to help it out I think right?  I don't think the LML cp4 is like the LB7 injectors where you know they are going to go it is just a matter of time and miles before they do.  Remember when reading on those forums the small percentage of people posting about those types of problems can be a lot louder then the majority of people that aren't having any issues and never have a need to post.  The only thing that had me thinking about swapping to a cp3 when I had my LML was that a cp4 failure could take out stuff down line and cost a whole heck of a lot more to fix then just the swap.
That is a large part of it for me as well
The loss of the CP4.2 means the loss of the injectors, a massive removal and cleaning of the entire fuel system. The return line pushing contaminated fuel back into the tank would call for a removal and cleaning of that, as well as the lines and perhaps of the lift pump as well.

I think the amount of labor to make all that right, along with the prospect of possibly a follow on failure due to a missed metal shard impinging a replacement injector begins to speak of a nightmarish scenario of thousands of wasted dollars.

Now about the power, and how I use it.

I purposely use lower settings because I know of the limits of the Allison.

In a perfect world of no financial constraints, I would replace the Ally and converter with something designed to hold 800 HP. I would use a better primary turbo and perhaps a low pressure turbo as well, and a modified CP# capable of supporting a more agressive tune. I would likely install head studs and/or other pieces of insurance to keep it all safe and secure

Why you ask?

I have long wanted to add a bit more structure to the front end to push away trees (or cars) that I seem to be encountering. I wold like to upgrade to a 16.5K winch, and add a 10K winch to the back end. I'd like to add a couple skip plates and a roof rack and one or two well designed roll bar loops to the exterior as a part of that roof rack.

Adding that extra 1500 lbs or more would slow the truck down a lot. 8700 (current weight) + 1,500 = 10,200 which would need a bunch more HP just to be able to run around (then) like it does now.

And that is why I'd like to add more HP/torque.

I think adding another 1500# is insanity myself. Honestly I don?t see the benefit in exchange for the added weight & cost.
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