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Oil leaking onto spark plug mike 8-14-11  
My water pump belt came off cause my 1978 440 dodge motorhome to over heat a lot. Since then oil leaks into the cylinder 1 & 3 causing caron build up on the spark plugs. They begin to misfire and the engine runs rough and back fires on accel. Any ideas other than redoing the heads.
Re: oil leaking onto spark plug Bubba the bus tech 8-15-11  
The engine is cooked.
Needs a rebuild, probably not just heads.
Sorry and good Luck
Re: oil leaking onto spark plug mike 8-15-11  
Thanks Bubba, thats what I though also, but when I clean the plugs, the engine runs fine for about 120 to 150 mile and then the plugs clog up again, then I clean them and it runs fine. It still has good compression and I don't seam to have any coolant leaks. I did cook some vaccume hose and #1 plug wire, (#1 spark plug is the worst of the two), all wires and vac hoses have been replaced. Someone told me today that I may have cooked the valve seals and to try replacing them first. What do you think, is this worth the try?
Thanks again for your help.
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