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110psi in cylinder 2, ~160psi in the others. Options?

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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mudchicken
Posts: 5
Joined: 7 January 2021
Year and Model: 1996 850R
Location: New York

110psi in cylinder 2, ~160psi in the others. Options?

Post by mudchicken »

1996 850R
Motor supposedly has ~70k miles on it according to the previous owner. Did compression test because I replaced PCV yesterday and still had slight pressure. Cylinder 2 has 110psi while the rest are right around 160psi.

Car seems to run great though, no check engine codes, no misfires, seems to have good power.

No smoke from tailpipe either and I burned less than a quart of oil over 4,000 miles (last oil change).

How significant is 110psi? Is it likely to get progressively worse?

yanga001
Posts: 787
Joined: 24 March 2019
Year and Model: 98/99/00 v/s70’s
Location: Ontario
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Post by yanga001 »

did you try a wet compression test?
1998 S70 N/A Auto (Parts car)(planned to be harvested)
1998 V70 N/A Auto New full restoration project (Water pump thrown at 404K Km)
1998 V70 N/A Auto (Workhorse) (Tree to driver B pillar :( )
1999 S70 T5 Auto(Project) (planned to be fixed)
2000 S70 SE M Learning platform (planned to be driven one day)
2008 S60 2.5T Auto (Sold)
2012 Honda Pilot AWD Touring (Daily)

mudchicken
Posts: 5
Joined: 7 January 2021
Year and Model: 1996 850R
Location: New York

Post by mudchicken »

yanga001 wrote: 17 Jan 2021, 14:38 did you try a wet compression test?
Yes, results were not significantly different from dry test

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