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Date:         Fri, 23 Feb 2001 18:12:37 -0500
Reply-To:     Robert Donalds <bostneng@FCL-US.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Robert Donalds <bostneng@FCL-US.NET>
Subject:      Re: Subject: hardware and torqueing was Flexing cranks and
              Yielding
Comments: To: kdlewis@JUNO.COM, Brian Cochran <rangerbrian@hotmail.com>,
          pensioner <al_knoll@pacbell.net>
Content-Type: text/plain; charset=us-ascii

Ken the extra turn after reaching the lower torque valve is great in that it makes for a more consistant results in the torque from bolt to bolt. These bolts works great on 1.8 jetta golf heads because when torqued this way the pressure against the gasket is more consistant across the head. Also as the engine heats up the flexing of the bolt in yeilding state helps maintain a consant pressure against the gasket with less change during the heat cycle. It is also very important that the pressure against the gasket is still there when the engine cools off the yeiding hardware does a great job of this. I think even with a higher tension of the stretch to yeild bolt the 2.1 rod cap can move around The problem seems to be as Pensioner pointed out to me that the 2.1 stretch to yeild rod bolt is a flexible joint. as always all rights reserved Bob Donalds thhp;//www.bostonengine

Bob; Thank you for the interesting link to automtiverebuilder.com. The article on connecting rod bolts was very informative, maybe too much so. Too much knowldge is a dangerous thing. Maybe I misunderstood but it sounded like the 2.1L style rod bolts were "the way to go" because they

could provide te best stretch-to-yield results. The extra turn after reaching the torque vaule negates variable rotational head bolt friction. Or something like that.


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