Took it for a 25 mile ride today, slight miss under power when cold, but clears up when the temp comes to normal. Other than that it seems to run great. Re Guinness on ice.... you are correct of course, stouts are better chilled and not ice cold. I drink em slow though so I start a little cooler... ...

Drove the car for ~ 10 miles, slight miss under power in one cylinder. Let sit overnight. Compression cold, dry: 220 / 215 / 220 / 215 / 215 Beautifull Took the car for another, "more spirited" drive, miss seems to be clearing up. Lifter tick calmed down too.... I think this project is don...

Compression after oil in cylinders: 245 - 250 all cylinders. Clearly the oil is helping..... Leak tested cylinder #1 and it was tight. Put it back together and ran it. Started fine, first pop was kind of hard but fine after that..... Idled up to temp and took it for a short drive. Loaded some sea fo...

Yep.... agree with all your statements, but I know for a fact exhaust valves were leaking. Could have been rings and valves.... Fed each cylinder an ounce of 10W-30 last night, cranked it through with plugs out, let it sit for a day. Will recheck compression tonight. Maybe attempt a start..... Chill...

Soooo..... I left the seafoam in the cylinders overnight and repeated the compression test, looking better.... Original, dry: 30 / 203 / 135 / 70 / 90 Latest, wet: 125 / 210 / 175 / 205 / 135 My first thought was rings but I know for sure I had exhaust valve leaks in 4 of the 5 cylinders, and no det...

Fortunately I like Guinness.... will take me a while to drink 12..... Put an oz of seafoam in each cylinder and cranked it through without plugs, gonna let it soak a few days.... (I can see your eyes rolling) :roll: I am not optimistic, just stalling... Buys me some time to go stock up on Guinness...

I just found a post with identical symptoms to my current issue.... low compression in 4 cylinders. His issue was with intake valves leaking, mine are exhaust leaks. His one good compression cylinder was #2 same as mine. https://www.matthewsvolvosite.com/forums/viewtopic.php?t=93339 Long thread... b...

Duke1: That's certainly possible, I am pretty sure the engine was not run with bad timing, but it may have been cranked through by hand.... Scot850: I see your point, I will be doing the labor myself so except for any machining required, labor is "free". Is there any possibility it could b...

- Non Turbo - I do not think that is a missing piece of the valve, I think that is something squishy between the valve and seat. But hard to tell from a low res image... - Hoping I do not need to replace the whole motor.... Thinking worst case its a valve job and maybe some head work. Fingers crosse...

Hello all, New to the forum, found some great info here, thanks for a great site. Last year a family member bought a cherry 1998 S70 from an estate, gorgeous car, no rust, dealer maintained, 40k miles, ran perfectly. This family member decided it was time to replace the timing belt, against my advic...