Hi everyone,
I own a 2006 Volvo S80. I bought it 2 years ago and only recently did a compression test following rising issues (many pieces were breaking, one after the other like the bearings, breaks, A/C, body parts). I took the car this time to a Volvo specialist with great reputation in my city to draw a picture of the issues and plan interventions based on priorities . No mecanic checked compression of the car before until I did this test, because simply all previous ones told me my engine works well. They were doing basic checks, maintenance and repairs. Actually I fixed the bearings and then tried to fix the A/C because I tought my car will be with me another 2 years at least, a significant investment in both cases.

Anyway, The results for compression came back as follows:

Cylinder readings: 170 / 110 / 80 / 110 / 85 psi

The car still starts easily and drives well on the highway, but I know these numbers aren’t good. My mechanic suggests trying decarbonization before declaring the engine in critical condition. If that doesn’t help, he recommends not pursuing further repairs and instead reassessing the future of the car.

I got emotionally attached to this vehicle. She’s been reliable and comforting through many chapters. I’m trying to understand whether others have recovered from similar compression readings, or if this is the beginning of goodbye.

Has anyone experienced something similar? Did decarbonization help? Or did you move on to engine work or replacement? AI says best case scenario, it will last another 24 months if the fix improves and worse case (no repairs and intense use), it will last less than 6 months. I'm afraid to spend money on a lost cause.
BTW mileage is slighly over 150 000 miles.
Thanks in advance for any shared stories or advice.

 

A leak down test would be a good next step. that will tell you where the compression is leaking to - burnt valves or past the piston rings.