Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

Replacing piston rings ?

Old 04-15-2013, 01:57 PM
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Join Date: Apr 2011
Posts: 3
Default Replacing piston rings ?


Anyone with experience in overhauling the B5254S ?
I have a 1994 850 which consumes oil - more than 1 liter per 1K kilometers
In the past I've replaced the valve seals and the seals on the camshafts and crankshaft.
The mileage is 360K ( kilometers )

My question is : Do these engines have a lot of wear in the cylinders at this mileage?
Can I expect that I need to bore the cylinders or is it normally enough to replace the rings ?
I'm not keen on getting stuck with a dismantled motor without a plan

The compression is 10,8/11 bars on all cylinders except for #4 which is 9,5
When adding oil is shows 14 ( due to haynes is should be 13,5 ? )
Old 04-15-2013, 03:50 PM
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Join Date: Mar 2009
Location: Albuquerque, NM
Posts: 15,762

If neglected any motor will wear out sooner than designed to. You say that it seems that wear is 20% on most and nearly 30% on #4. That's pretty bad. I have 225,000 miles (362,102 KM's) on mine and my compression numbers are within specs.
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