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Date:         Mon, 15 Feb 1999 15:01:41 PST
Reply-To:     vwvanman@EXCITE.COM
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Robert Lilley <vwvanman@EXCITE.COM>
Subject:      Re: 2.1L Wasserboxer Power Rebuild
Comments: To: Darrell Boehler <midwesty@midwest.net>
Comments: cc: vanagon@vanagon.com
Content-Type: text/plain

I have torn down > two 2.1L, both high mileage and they don't seem to beat out the center m= > ain > bearing as bad as the air cooled engines. I guess I am unaware of the cr= > ank > shaft whipping around and beating out the #2 main with high rpm or other > wise. Have I missed something? I have had both my rebuilds dynamically > balanced and feel it is well worth the expense. They are both very smoot= > h > and love high rpms.

Darrell,

Before I took my case apart I was planning the engine. I talked with Demello and others about counterweighting. One said to do it another said not to... But, when I took my case apart I saw that my center journal had been moving around some and the case had some fretting. I then talked to Bob from Demello again and agreed that counter-weighting was necessary to keep the crank from flexing.

It balances the mass from the pistons rotating. Smooths out the engine.

True the 2.1L does not move as much as the bug case, But I have heard of 2.1L cranks breaking in the center and for $150 extra the insurance and smoothing out of the engine was, IMHO worth it. Plus with a stock four speed tranny turning at 4000 RPMS at 70 it will help.

Plus, Why do High Performance engines have counterweight cranks?

Robert

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