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[ Follow Ups ] [ 3-series (E30) Message Board ] [ Msg. Board FAQ ]
Posted by Bill-H on April 01, 2001 at 22:33:10:

In Reply to: If I blow an OiL RING, what should I do? posted by Mat B. on April 01, 2001 at 21:08:45:

First of all, an oil ring would not cause a compression loss. The oil rings scrape excess oil off of the cylinder walls. The compression rings, yes there are usually more than 1 on each piston, provide the compression, not the oil ring. I would be more suspicious of a valve train problem than a ring. Back when i worked in a garage, we used an oil test to determine if the compression loss was due to rings or valves. Get an oil can, pull all the plugs, squirt a few pumps into each cylinder, and then run a compression test. If the pressure comes back up, then it is a ring problem. If not, then I would look elsewhere.
The Noise symptom would make me look at a burnt or bent valve also. try to determine where the noise is coming from, the intake or the exhaust. Either would point to a valve also.
Let us know what happens, Bill-H


Last week I had a new timing belt installed and 6 new Bosch Platinum +4 plugs. I gunned it down a 300 yard stretch, shifting at 6000rpm when i noticed i suddently lost power. Now my car was much louder and much slower. To make a long story short I had my engine looked at and my compression reading were as follows.

175 .. 175 .. 60 .. 175 .. 175 .. 175

I lost an oil ring on my third cylinder, my mechanic blamed it on those spark plugs. Said to much gas was in the cylinder at once, plugs made a large explosion which broke my oil ring. Is this true? If not, what could be the real cause? 220,000km on the engine, and I'm very selective as to when I beat on my engine, never shift past 6000rpm. Synthetic oil.

What are my possible solutions? My mechanic said 1200 bucks to put in a new piston and oil ring but he said other stuff in the engine may be wrong, causing me more money in the end than replacing the whole engine. His other suggestion was to put in a new engine for around 2000 dollars.

What do you guys suggest I do?




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