04 smoking - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 2 (permalink) Old 03-22-2011, 12:48 AM Thread Starter
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04 smoking

I have an 04 2500hd 4x4 and I was letting it idle while at a friends house, maybe 15 min. It was dark and I could see smoke in the beams of my headlights. Looked into further and found what looks like a vent of some sort, just to the left of the balancer. It is blowing out what looks like smoke, if you take of the oil fill and it is blowing out of there. The truck has 147k on it, injectors were replaced about 10k ago.

Blow by is what I have been told (not by professionals) but doesn't make sense to me this truck should be good for a lot more miles than this. I don't beat on this truck, I do plow snow with it but am very easy on it. I change oil every 5k, fuel filters every 10k.

I just don't understand it. Any help or suggestions would be greatly appreciated.

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post #2 of 2 (permalink) Old 05-05-2011, 01:18 PM
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On the earlier trucks the PCV system has a tube that vents right where you explained by the balancer. If it's puffing out the oil fill cap, that usually points at an issue with a piston or rings. I'd do a compression test on it to get some more info.

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