Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site watvlsi.UUCP 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)