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Volvo engine? Valves not rings is the typical problem in my experience. At a similar mileage my 850 engine bores looked like new. The valves, not so much.
Leakdown test will tell you very quickly.
Also, the Volvo PCV system is a total PIA...and I'm thinking that's not your real problem. Those engines usually run and idle regardless of the PCV condition.
Did you try the Volvo glove test?
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Last edited by 1990C4S; 03-09-2023 at 06:55 AM..
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