Posted by PeteTheRookie on August 19, 2012 at 08:38:51 from (74.78.21.209):
In Reply to: 2002 Impala posted by Maark on August 19, 2012 at 06:29:30:
UGH. We have a 2002 Pontiac with the 3.4 transverse mounted (FWD) V6. What a total POS.
Most likely the rear head gasket. Did this engine over heat?
This design originally had a cast iron block with cast iron heads. When they switched over to aluminum heads the design failed in my opinion.
I just got thru pulling everything off the top of the motor to change the intake manifold gasket. I t had already been changed once already at about 75K, it now has 115k. The intake gasket was weak, changed it as I was hoping that was the issue again. BUT the real problem is the rear head gasket on nbr 1 cylinder is leaking. When we pulled plugs we found water in that cylinder. The way the water jackets pass from head thru intake manifold it will leak water(hot and under pressure) into the oil if that part is bad. Or, seep oil into water. We had oil in water and only detected water in the oil with a oil analysis. There was no visible signs of water in the oil.
I will never buy another GM V6 in my lifetime. Pete
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Today's Featured Article - Storing Your Tractor - by Staff. If your tractor is going to be stored for any length of time, a few precautionary measures are helpful in preserving various parts, also in avoiding future difficulty. Store tractor under cover. If impossible to place tractor under cover, be sure to cover air stack and exhaust pipe. Drain radiator and engine block. To avoid gum content collections, drain both fuel tanks and carburetor. Leave radiator and fuel caps slightly loose to protect gaskets. Block tractor up to remove weight from tires and to keep tires from contact with moist floor.
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