LB7: Blew a gasket.

2wd_Sled_Puller

Heavy Equiment mechanic
Feb 19, 2008
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Florida
Im glad they fixed this problem in 04 i here eariler module duramax could not hold no more then 35 psi of boost before lifting the head. Now i see at 40 they go. Sorry to here about this.
 

Pondsy

New member
Jan 4, 2008
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Plymouth, MA
That sucks! :(

Mine goes in today for the right side. I'm haven't run much, if any, power. Been running mostly stock and an occasional mileage tune. :confused: I hope this holds and I don't have to redo them.

I'm hoping to get the exhaust and fuel pump this summer so I could have a little more fun and maybe make a couple runs. Guess we'll see.

Hope you're back on the road soon.
 
Mar 25, 2008
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Whitehorse Yukon
So riddle me this everyone. I have gone back to full throttle 40psi runs(only done a couple though) but running it consistantly at 30psi and haven't pushed a single drop of coolant out.

So the the confusing thing for me is what could have caused a burp of coolant out the overflow, enough to make the low coolant light come off, and then not ever do it again??:confused:

I should add that when it happened the first time that I did about 8 50mph-120mph runs back to back but the temp gauge never made it over 210.
 
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WolfLMM

Making Chips
Nov 21, 2006
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AL
So riddle me this everyone. I have gone back to full throttle 40psi runs(only done a couple though) but running it consistantly at 30psi and haven't pushed a single drop of coolant out.

So the the confusing thing for me is what could have caused a burp of coolant out the overflow, enough to make the low coolant light come off, and then not ever do it again??:confused:

I should add that when it happened the first time that I did about 8 50mph-120mph runs back to back but the temp gauge never made it over 210.


The same thing happened to me about three years ago (before all my power:D) and hasnt happened since. My low coolant light came on, took it to the dealer ran some test but nothing was leaking.
 
Mar 25, 2008
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Whitehorse Yukon
Well me and Adam were on the phone and he said something about an air bubble in the system but if that was the case the temp gauge should have moved but I am unsure on that as I am not a mechanic.
 

WolfLMM

Making Chips
Nov 21, 2006
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Well then I guess I will drive it easy for now and get the studs put in that I have and no need to pull the heads off just get em in and clamp em down.

Pm me if you have any questions! I just put studs in my truck last week.

Good luck
 
Nov 3, 2006
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Modesto, CA
Well then I guess I will drive it easy for now and get the studs put in that I have and no need to pull the heads off just get em in and clamp em down.

IMO, do it right while you have it apart unless you want to do it again.

My truck pushed coolant at the track once and then all seemed well. Not much longer, maybe a couple weeks, it wouldn't stop pushing coolant.
It was my injector cups that were leaking.