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Oil in combustion chamber trick—question

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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JimBee
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Oil in combustion chamber trick—question

Post by JimBee »

The '96 wagon I picked up with a "dead" engine, going to try to start it this weekend. Changed the absolute grungy oil and new filter, I have a new set of Bosch Copper plugs. The top end was severely flooded with gas from several attempts to start it before. I could see it pooled, so just let it set for a few days with the plugs out, then changed the oil. The piston tops look dry. I poured a little oil into the plug holes but since the cylinders are at an angle, it will only get on maybe half of the piston skirt and cylinder wall. So I'm thinking to get an oil coating all around the cylinder I could either jack the rear end of the car way up high to get the cylinders more vertical, or just pour in quite a bit more oil so it pools all around the piston crown and let it sit for a couple more days.

Gas feed seems good; will the plugs even fire with that much oil?

jimmy57
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Post by jimmy57 »

teaspoon of ATF per cylinder and jack up the rear. That will do the trick if oil is going to help at all. Too much oil will give you other problems.
Before you install plugs after addition of ATF has been in there a bit, place rags over the plug holes and crank it over and let excess blow out and this also distributes the ATF on cylinder walls. ATF is more beneficial. If the rings are stuck in ring grooves on pistons the detergent in ATF can loosen the stuck rings.

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