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  1. W

    Head Resurfacing

    Thanks for all your input. There's a lot of knowledge out there. The machine shop said there was something with the fire ring that needed resurfacing. They don't get many Duramaxes here so y'all input is golden.
  2. W

    Head Resurfacing

    I also saw one of the other posts said you can resurface up to .0079. Is that correct?
  3. W

    Head Resurfacing

    I have my truck(2004 GMC with 265K miles) in the shop right now getting new head gaskets. The mechanic said he contacted the local Chevy Dealer's "expert" and was told the heads cannot be resurfaced on duramax engines. Everyone I spoke to said they can and thats why the different thickness...
  4. W

    LB7: Overheating/coolant leak LB7

    Found the culprit today. A rectangular rubber gasket on the oil cooler was never installed correctly from the factory. It last 250K miles. What a pain to fix. I'll post a picture when I figure out How to.
  5. W

    LLY: Surging issue

    My LB7 was surging bad when it was warm. Put a new fuel pressure regulator on it and now it is smooth as silk.
  6. W

    LB7: Overheating/coolant leak LB7

    Drove it today and leaked like crazy. Added over two gallons of water and couldnt get it to leak again so I could try to find the leak. Very frustrating. Is there a line on the top of the motor that could leak only under pressure.
  7. W

    LB7: Overheating/coolant leak LB7

    Pulled the inner fender an nada. Drove it today and no leaking. Ordered a new coolant cap. Could it be the cap is not releasing pressure causing something else to leak.
  8. W

    LB7: Overheating/coolant leak LB7

    If I run it hard it will leak and relief the pressure. It is not rock hard in the morning.
  9. W

    LB7: Overheating/coolant leak LB7

    first time on the site so excuse me if I'm a bit slow. I have a 2004 Gmc 2500HD LB7 with 249K on it. I had an overheating issue on my last trip an found water leaking down onto the oil filter area, I let it cool and filled it with water, drove 600 miles with no problem. Pressure tested the...
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