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Path: utzoo!watmath!watnot!watvlsi!ksbszabo
From: ksbszabo@watvlsi.UUCP (Kevin Szabo)
Newsgroups: net.auto.tech
Subject: Re: causes of blue smoke:  ring wear vs. valve seal wear
Message-ID: <2787@watvlsi.UUCP>
Date: Tue, 12-Nov-85 05:01:24 EST
Article-I.D.: watvlsi.2787
Posted: Tue Nov 12 05:01:24 1985
Date-Received: Wed, 13-Nov-85 06:56:26 EST
References: <1278@ihuxi.UUCP> <318@watmum.UUCP> <728@ihu1g.UUCP>
Reply-To: ksbszabo@watvlsi.UUCP (Kevin Szabo)
Distribution: net
Organization: VLSI Group, U of Waterloo
Lines: 24
Summary: 

In article <728@ihu1g.UUCP> rls@ihu1g.UUCP (r.l. schieve) writes:
>My own experiences, working
>with cars that are reasonably maintained, (oil changed regularly) is
>that rings are almost never the problem but valve SEALS very often
>are.  Whenever my 1971 GTO started going through more than 1 quart of
>oil in 1000 miles, I knew it was time to replace the valve seals.

I agree absolutely.  I was in a situation that required the
head to be removed.  Just for kicks I lapped the valves and
replaced the valve stem seals.  Up to then I had been losing
about 3/4 qt per 1000 miles.  After the new seals the oil loss
was unnoticable.

I *had* thought my problem was uneven cylinder bore (the shop that
rebuilt my engine said that this was a problem that would eventually
crop up.  I didn't rebore the cylinders 'cause it was a wee bit
expensive for my student tastes).  But, after 145,000 miles she's still
going strong.  Oh, yes, I forgot to mention the car.  1970 volvo 145-s,
with B20 engine.

			Kevin

-- 
Kevin Szabo' watmath!watvlsi!ksbszabo (U of W VLSI Group, Waterloo, Ont, Canada)