GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

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Old Feb 16, 2012 | 03:43 PM
  #11  
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:hmm: Mine smokes like a bitch after you crank it up after running hard, but its oil. I had a friend who had a dogde and white smoked all the time. finally it got so bad motor failed, had to replace motor because of bad head gasket and a warped head i think. overheated and fried motor
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Old Feb 16, 2012 | 03:56 PM
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Next time you start it up, smell your exhaust. Should be pretty easy to tell if its oil or coolant. Just because your heads are not cracked does not mean they aren't warped. If your exhaust smells like coolant when it first starts up, I would pull the heads and have them checked for cracks and deck flatness at a professional shop.
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Old Feb 16, 2012 | 04:15 PM
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Originally Posted by PowellSixO
Next time you start it up, smell your exhaust. Should be pretty easy to tell if its oil or coolant. Just because your heads are not cracked does not mean they aren't warped. If your exhaust smells like coolant when it first starts up, I would pull the heads and have them checked for cracks and deck flatness at a professional shop.
honestly it smells of gas and oil from what i can tell... the cooliant level is and has been fine since ive swapped the gaskets.
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Old Feb 16, 2012 | 04:23 PM
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idk if this helps but there is not a check engine light on and it hasnt been throwing any codes....
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Old Feb 16, 2012 | 05:16 PM
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Must be an oil leak then
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Old Feb 16, 2012 | 05:17 PM
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Originally Posted by Cknox121
Must be an oil leak then
were should i start? lol im not seeing any oil in the cooliant i flushed it about 2 weeks ago and it still looks good...
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Old Feb 16, 2012 | 08:21 PM
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So just incase what are some tests and stuff I can run. I added a quart of oil and hasn't been over 1000a miles since my last oil change. The coolant is still fine. But I pulled the oil cap off and there was a milky thickish substance on it and looked like condensation on the top? I might as well start at square one and try and figure it out. Also if the heads warped what's the best thing to do? And if its cracked what's the beat way to go? Thanks guys ill check on a bunch only got 2the days off that ls for the help...
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Old Feb 16, 2012 | 08:26 PM
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Who tuned it?

If a head is warped a machine shop may be able to fix it up but it depends on the damage.


Also what is your setup?
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Old Feb 16, 2012 | 08:43 PM
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Originally Posted by JFOLM
Who tuned it?

If a head is warped a machine shop may be able to fix it up but it depends on the damage.


Also what is your setup?
2004 gmc sierra 5.3 ext cab 4x4, CAI. Ebay longtubes, TB spacer, Nelson Tune, TR 220 cam on 114 lsa, hardened push rods new valve seals, ls7 lifters, Ls7 springs. and Tbss injectors. It idles at 600ish.... ?
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Old Feb 17, 2012 | 08:15 AM
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im gunna prob try and have a compression test done tomorrow, any other things you all can think of without pulling the heads?
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