Date: Wed, 21 Apr 2004 18:02:22 -0700
Reply-To: Mark Seifert <theburnvictims@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Mark Seifert <theburnvictims@HOTMAIL.COM>
Subject: Re: Tools for engine overhaul on 85 waterboxer
Content-Type: text/plain; format=flowed
What I meant was, I don't think it has to be EXACTLY DEAD ON 37.00000 lbs,
as in, if you torqued one at 38.2 lbs, and another at 36.1 or something like
that. I dont believe it would make a bit of difference. I'm not going to sit
here and try to tell someone to use a ratchet and hold it with 2 fingers or
something like that, but I do think that the waterboxer is a pretty
forgiving motor when it comes to torque specs.
>From: John Rodgers <jh_rodgers@bellsouth.net>
>To: Mark Seifert <theburnvictims@HOTMAIL.COM>
>CC: vanagon@GERRY.VANAGON.COM
>Subject: Re: Tools for engine overhaul on 85 waterboxer
>Date: Wed, 21 Apr 2004 09:31:03 -0500
>
>Mark Seifert wrote:
>
>>When I rebuilt my 2.1 waterboxer, I never needed any special tools. I used
>>a
>>slide hammer to pull the wrist pins out. Everyone has told me not to use
>>the
>>click-type torque wrench on the heads. Not sure exactly why, but they
>>preach
>>it, so I listened. I bought a cheapo pointer-syle for $11. Those dont seem
>>very accurate, but I dont think it has to be exactly 37 lbs anyway.
>
>Mark,
>
>BAD! BAD! BAD!
>
>Torque values specified are specified for a reason. and this is especially
>true on head bolts. Get even one head bolt out of spec and you are headed
>for trouble. This would allow uneven expansion/flex and result in a seal
>leak, or worse, a cracked head or case. For these reasons the torque wrench
>needs to be a good one that is properly calibrated, and whose variations
>through the ranges of torque for the wrench are minimal. In other words, as
>Marisa Tormei said in the movie "My Cousin Vinny" --- " The torque wrench
>should be dead on balls accurate!" She was right on. Especially on head
>bolts. And case bolts where applicable.
>
>I had a cylinder barrel come loose on an airplane in flight one time,
>because some damn fool didn't use the calibration tool to calibrate the
>torque wrench before tightening down the nuts on the cylinder case-studs.
>It's a wonder the engine didn't just fail, but I managed to get the
>aircraft on the ground ok. Oil was all over the place. The noise was awful,
>and scared the crap out of me. Hell of a noise. Several studs were broken,
>and nuts backed off on others, allowing the cylinder to work up and down.
>Could have been deadly.
>
>Vanagon engines are not quite so crucial, but you could destroy an engine
>if the torques are not properly applied.
>
>Regards,
>
>John Rodgers
>88 GL Driver
>
>
>
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