Question about 1998 Chevrolet Astro Van
New intake & valve cover gaskets, new plugs & wires, new distributor cap and rotor and new oil sending unit. engine has white smoke and starts ticking when reaching about 30mph
Sounds like coolant getting into the combustion chamber. Potential causes in order of significance: Intake manifold gasket (might not have been done right), Head gasket(s), cracked cylinder head, or, cracked engine block. Check the oil. If it looks like chocolate milk it means the coolant and oil are mixing
Posted on Dec 30, 2013
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Posted on Jan 02, 2017
My problem was solved when I repaired my 4 wd activation dash switch. The switch was contacting on 2WD & 4HI at the same time. The front differential activation is vacuum activated possibly creating a tug of war that didn't actually engage it but drained off vacuum from the engine? A theory at best but stumbbled across it because I knew the switch wasn't working properly I repaired it and low and behold rough idle disappeared and all is good for 3 weeks running.
Posted on Dec 10, 2008
yes check fuel lines check filter.take off fuel line after pump and make sure gas is pumping out.if not could be rust in fuel tank or get electric fuel pump and try it?
Posted on Sep 15, 2009
REPLACED IDLE AIR YOU HAVE TO ADJUST ITS DIMENSION. MEASURE FROM THE TIP OF PINTLE TO THE MOUNTING FLANGE.YOUR DISTANCE HAS TO BE 1 1/8 INCH.IF NOT ADJUST PINTLE BY PRESSING IT 1 1/8 INCH. YOU NEED TO RESET IDLE BY CYCLE THE IGNITION KEY ON FOR TEN SECONDS THEN OFF FOR TEN SECONDS TO RESET THE VALVE.START THE ENGINE ALLOW IT TO IDLE FOR FIVE MINUTES TURN THE ENGINE OFF FOR THIRTY SECONDS THEN START THE ENGINE AGAIN AND CHECK THE IDLE OPERATION.
Posted on Jan 16, 2011
The valve cover gasket isn't hard to change. Oil on the plugs indicates a more serious problem. Smoke from the exhaust would be from rings, rich mixture, worn valve guides. It may be that the engine is overfull (that would show on the stick). Oil loss from a leaking gasket would smoke under the hood and leave oil on the engine and the ground.
Posted on Mar 25, 2011
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Here is the oil leaking Problem Identifying Technique
Engine oil leaks from the valve cover gasket are common.
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