[Vwdiesel] hillbilly TUNING. ---- ( the Valve train )

[Shawn Wright]

I'd say yes - when I checked mine cold, then later hot, after I got the tools, the 
differences were similar to what is indicated in the book. I also rotated the engine by 
hand after installing new discs, and re-checked, as in some cases, I've found them to 
be still off a bit. I always aim for the large end of the range, since they wear tight.

On 11 Apr 2005 at 22:08, Rudy Petersen <petersenrudy at hotmail.com> wrote:

> I'd like to adjust mine hot.  Do you think the steel and aluminum is still
> hot enough to make much difference in the expansion after you pull the VC
> and get into it?
> 
> Rudy  
> 
> > -----Original Message-----
> > From: vwdiesel-bounces at vwfans.com 
> > [mailto:vwdiesel-bounces at vwfans.com] On Behalf Of LBaird119 at aol.com
> > Sent: Monday, April 11, 2005 8:44 PM
> > To: vwdiesel at vwfans.com
> > Subject: Re: [Vwdiesel] hillbilly TUNING. ---- ( the Valve train )
> > 
> > >VW diesels are notorious for valve clearance deminishing with wear.
> > >SO ?   well this lack of key in the camshaft ? -----   lets 
> > us Hillbilly 
> > Tuners correct >by moving  valvelift a tad back --to the 
> > optimum performance.
> > 
> >   Actually you correct the diminishing clearance by adjusting 
> > the valves with thinner shims.
> > 
> > 
> > > >Valves are opening sooner and sooner till they no longer 
> > close.   I ask 
> > > Loren and >the other mechanicks to tell us if I am correct 
> > ?   (maybe I am bass 
> > > ackwards ?)
> > > >
> > > >Hagar.
> > 
> >   Yes, if the clearances are less then the duration is 
> > extended.  Only when 
> > valve lash is zero or less will the valve not close, except 
> > for bounce, etc.
> > This is remedied by reestablishing the proper clearance, not 
> > advancing or 
> > retarding the valve timing.  If the lobe circle has no 
> > clearance, advancing 
> > or retarding fixes nothing. 
> >   Not that there may not be some merrit in miniscule advance 
> > or retarding 
> > of the valve timing but how much, which direction, is it 
> > worth the risk of 
> > bending valves... are all valid questions.  I've leaned 
> > toward the last one.  
> > ;-)
> > 
> > > >
> > > >PS : make sure you have lots of valveclearance.   ----mine 
> > were fine cold 
> > > --BUT >warm ?
> > > >one valve did not close. (1.5LNA)
> > > >
> > 
> >   Cold settings are ONLY for assembly.  All valve adjustment 
> > are supposed 
> > to be done on a hot/warm engine.  Many engines DO permit or specify 
> > clearances when cold.  I believe the engine runs in a warm 
> > state and that 
> > is the best state to set the valve clearances.  :-)
> >      Loren
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> > 
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Shawn Wright
http://zuiko.sls.bc.ca/~swright
'85 Jetta D 
'88 Westy 2.1L, soon to be 1.6TD 5 speed
 (see progress at http://members.shaw.ca/vwdiesels)
'82 Diesel Westy