Blue Smoke

whoa · Post by **whoa** » 04 May 2010, 21:45

Valve stem seals would be my guess. The fix is to replace them. They're cheap! And super easy to fit on the valve guides!

(unfortunately there is the small matter of the 12 hours of labor it takes to get to them and put the engine back together)

Jasle · Post by **Jasle** » 08 May 2010, 21:00

I'm about to do this on my V70. Wondering if you could just use air in the cylinder to hold the valves closed. I have an air fitting I welded to a spark plug I blew the ceramic out of. compress the vlave spring and take the keepers out. then replace the seals. seems like it should be way under 12hours? I've seen some guys feed rope down the cylinder and turn over to hold the valves up while doing the same. just never seen it done on the Volvo.

whoa · Post by **whoa** » 08 May 2010, 21:23

Yes, in fact using air the standard way; rope is shade-tree ghetto. I don't have a compressor, and it took so long to deal with the damned keepers that I wouldn't have wanted to be running a compressor that long anyway. Plus, with a compressor there is more of a worry that the piston will get pushed back down by the air pressure. I don't see much of a drawback with the rope---that part of the job was very straightforward.

If you're used to this sort of job, you can probably do it a lot more quickly than I did (two full days---more than 12 hours). I'd be interested to hear how long it takes you & how it goes.

Edit: Oh, I thought you were replying to me having seen my rope-trick write-up; now I'm thinking maybe not, so just in case, here: http://sites.google.com/site/incarvalve ... ement/Home