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Date:         Thu, 26 Aug 1999 00:09:34 -0500
Reply-To:     Marshall Ruskin <mruskin@PANGEA.CA>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Marshall Ruskin <mruskin@PANGEA.CA>
Subject:      Re: Temp vs. Backpressure
Comments: To: Christopher Arnold <arnolcj@TRAVELLER.COM>
Content-Type: text/plain; charset="iso-8859-1"

Well, I am NOT a mechanic,

but I have read on the list that when a catalytic converter gets destroyed, it will rattle inside.

To test this out, I have read that you bang on the cat with a metal rod, and listen for a rattling "briquettes" type of sound.

Marshall Ruskin

>After a history of engine temps hovering at the bottom of the LED w/ temps >in the 90's, our '87 GL has decided to slowly heat up. Coolant tanks are >full and stable, belts are in good shape (recently replaced) and we're not >running the A/C. What I have noticed lust recently (about the same at the >higher temps) is a heavy rattle which seems to be originating at the >muffler (which is rusty and sounded semi-perforated before). The rattle >goes away when the engine is a little above idle. In addition as the >engine heats (never overheated *yet*) up engine "power" & response drops >significantly. >My thought...The muffler is coming apart blocking the exaust flow. In turn >backpressure on the system keeping the cylinders from being evacuated >completely and progressively raising engine temperatures. Sound possible? >My other option is that the H2O pump is failing (because of a new belt??). > >Thanks, Chris A. > '87 Vanagon GL > '87 Honda Accord (201k) > '86 Honda Civic Si (236k) >


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