Repair guides and support for the third generation of C/K pickup trucks.

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Tons of smoke from 1979 k10 exaust... ps its gas

Every thing is fine exept I'm getting like 4 mpg and its smoking like !&&*

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Check the air filter . If the pcv is plugged it will blow the valve covers off. May want to check the fuel mix on the carb it sounds a little rich . Is the smoke blue black or white. Do your eyes water when standing around the engine when its idling if so you to rich. may also want to check your timing

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White smoke I have an edlebrock 600cfm carb I'll put on it and see what happens

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Smoking has a lot of causes. A bad pvc valve is the most likely. It will be in the hose between a valve cover and the intake manifold. A another common cause would be a stuck choke valve in the carburator. Just replace the pvc valve. The choke a little WD40 usually does the trick.

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This really sounds like the choke. If you take the air cleaner cover off and look inside. The hole will be closed. That sheet of medel is the choke. When the engine is cold it is closed to pull more gas into the carburator as the engine warms up it opens. The makes the gas air mixure leaner(less gas) and the gas milage is better and less smoke.

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White/Gray Smoke: White exhaust smoke is an indication that coolant is burning in the combustion chamber. These are possible causes:

Cylinder Head: A crack in the cylinder head (around the coolant jacket) will cause coolant to enter the combustion chamber.

Engine Block: A crack in the deck of an engine block near the coolant jacket will cause coolant to enter the combustion chamber.

Head Gasket: A damaged or blown head gasket will cause coolant to enter the combustion chamber resulting in white/gray smoke coming from the tailpipe.

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