Most of my experience with chains and gears comes from bicycle maintenance,
but I think it still applies.
Never put on a new chain w/o changing the gears. If the gears are gears
have wear, then the spacing between the teeth is greater than new. This
will cause premature wear on the new chain. One way to see this is that
the teeth will have points.
ASCII version with teeth down(bad) \/\/\/ compared to (good) \_/-\_/-\_/.
I believe that someone had put images of new and old gears on their web
site.
The question of changing gears with the engine in was discussed within the
last couple of weeks.
Dana
> It had been almost two years since the engine rebuild but the
> motor has never been run yet. Slow restoration. The chain
> looks brand new. Wrong chain? I will try to track down the
> mechanic. Did he forget to replace the gears? It's been too
> long to remember whether or not he spoke about the gears. I
> know he had a good machinist doing the other related work.
> If work is required say to replace chain or gears, then can
> it be done while engine is in the car? Engine compartment is
> still bare. Larry.
>
> -----Original Message-----
> From: noji [mailto:noji-1@pacbell.net]
> Sent: Sunday, February 08, 2004 10:39 PM
> To: 'roadster68'; datsun-roadsters@autox.team.net
> Subject: RE: Upper Timing Chain Tensioner - '68 2000
>
>
> Larry,
>
> The chain is a long chain. So possibilities:
> 1. Old chain.
> 2. Warn out gears.
> 3. Cut head.
> Dana
>
> > Hi Everyone, I tried the technique suggested on Gordon
> Glasgow's site
> > as suggested by Brian. When I put the chain tension on the upper
> > tensioner side the chain slack on the other (chain guide - evil L)
> > side was a lot. I could almost touch the two sides of the chain
> > together. So the chain can definitely touch the chain guide. The
> > chain guide is not new so it shows some wear from before the latest
> > engine rebuild.
> > I put a small open ended wrench in between the tensioner pad
> > and body. I did this to quickly reflect additional shims.
> > Then I put the tension back on that side of the chain. I did
> > this with a rachet set not by pushing the car back. I would
> > expect the same result either way. There was still lots of
> > slack on the other side of the chain. How is that possible? Larry.
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