[Vwdiesel] TDI blunder

gary gbangs at cfl.rr.com
Sun Sep 26 23:40:15 EDT 2004


Yes, it is possible to change head bolts AKA RaceWare method.

But I would have to doubt the integrity of the head gasket.

When you over-torqued the bolts, you crushed the gasket 'x' amount. If
you change the bolts and relax the torque to spec, will the gasket relax
with it? 

The engineer in me says no. But I didn't design the gasket.

But then again, when torquing to 60ft-lbs, did it feel like you were in
the stretch zone? Whenever I did stretch bolts, I could always tell when
I entered the stretch zone.

Perhaps you can just loosen each to, say 40ft-lbs, and bring back up to
44, and then continue the +1/4 turn sequences.

How lucky do you feel?


On Sun, 2004-09-26 at 22:46, Shalyn Shourds wrote:
> Well, I stumbled across enough motivation to stick the head on the TDI 
> tonight.  So, I whipped out the head, gasket, and sawed the heads off 
> two old bolts to use for guides.  Stacked it all on the short block and 
> started tightening.  Put it to fourty, then as I was taking it to sixty, 
> one word crossed my stream of unrelated counsciousness:  Newton-meters.  
> Needless to say, I was torquing it to foot-lbs. 
> What I should have done:  30 ft-lbs, 44 ft-lbs, 90º, 90º.  What I did:  
> 40 ft-lbs, 60 ft-lbs, curse.  I'm thinking that I wll have to remove the 
> (stretch) bolts and replace with new since it's overtorqued to an 
> indeterminate degree.  My immediate question is should I replace the 
> head gasket as well, or just replace the head bolts one by one and hope 
> for the best.  Seems like I remember the Raceware bolts being installed 
> one by one without replacing the head gasket, but then again, they're 
> done all at once, not in several successive torque steps, as I recall. 
> That's what I get for using an American torque wrench with ft-lbs in the 
> big obvious numbers and a Geman car with N-m listed first.  That, and 
> not paying attention.... 
> So, anyone with some Raceware experience and a lucky guess got some 
> advice? 
> -Shalyn
> '00 TDI
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