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Date:         Tue, 27 Jul 2004 12:32:07 -0700
Reply-To:     BenT <syncro@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         BenT <syncro@GMAIL.COM>
Subject:      Re: Loud clanking sound from exhaust - pushrod unseated?
Comments: To: Craig Oda <craigoda@gmail.com>
In-Reply-To:  <b3a1e7ad04072709435c689067@mail.gmail.com>
Content-Type: text/plain; charset=US-ASCII

Clanking sound sounds like broken pieces in the catalytic converter to me.

BenT http://members.aol.com/bentbtstr8/myhomepage/index.html

On Tue, 27 Jul 2004 09:43:03 -0700, Craig Oda <craigoda@gmail.com> wrote: > I'm trying to plan out my weekend and upcoming camping trips and am > trying to get a feel for how much time I'll have to spend to get my > van back on the road. > > I have a loud clanking sound from my engine. It's not the tick from > lifters. It is considerably louder. There definitely seems like > metal is rattling around. It appeared to sound like a nut was > rattling in the exhaust. (I don't think there is one, but it sounded > like this). > > The problem occurred 30 miles from home last weeknd and I drove home > on the freeway with the loud rattling sound. No power loss and no > drivability problems. However, the sound is really loud. > > Joel Walker was kind enough to suggest that one of the pushrods might > have come unseated from the lifter. This situation is possible since > I just changed two lifters about a month ago and had the pushrods out. > Also, I adjusted the exhaust valve on cylinder 3 considerably. I had > a problem with air in the lifter and the valve was about 5 turns too > tight. So, I loosened it up so that it was barely touching, then > tightened it down about 1 1/2 turns. I wonder if air was still in the > lifter and somehow the pushrod became unseated. > > I may not have time to take out the pushrods until the weekend. If a > pushrod is unseated, what else should I inspect for damage. > > Also, do other people suspect a pushrod? The problem began while I > was driving on the freeway. I continued driving for another 30 miles, > so I don't think it's a valve clanking around in the exhaust. I took > off the u-pipe for the exhaust and there's no metal in there.


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