The nylon tie wraps sounds like an interesting idea. However, I would be
worried that parts of the nylon could break off and plug an oil hole. Nylon
washers or metal washers might be better. Personally, I added a stiffer
spring, and that seemed to take care of it.
Todd Barker
----- Original Message -----
From: Marshall Colley <mcolley@earthlink.net>
To: <datsun-roadsters@autox.team.net>
Sent: Monday, October 29, 2001 10:39 AM
Subject: Chain Tensioner
> Fred,
>
> The problem is the oil tensioner doesn't build up pressure fast enough at
> start-up and therefore lets the tensioner move all the way in ( you
probably
> already know this but other's may not), thus no tension on the chain until
> oil pressure does it's job. I fixed this by buying a stiff spring at PEP
> boys to replace the weaker ineffective stock spring (inside the
tensioner).
> I had to shorten it to size but, it's thicker design prevents the
tensioner
> from moving back so far at start-up.
>
> Another easier fix that a Roadster specialist shared with me was to snug
> "nylon" wire wrap straps around the shaft of the tensioner as spacers, to
> basically, do the same thing; prevent it from moving back so far. I did
> something similar on my first attempt but the rubber spacer didn't hold up
> to the oil and high temperatures and eventually disintegrated. However, he
> said the nylon did the trick. One can add more straps to increase the
> desired space. Plus, it's a 5 minute install...nice.
>
> Either manner will keep the tensioner from losing all affect at start-up.
>
> Marshall
>
> > From: Roadster <roadster@texoma.net>
> > Reply-To: Roadster <roadster@texoma.net>
> > Date: Mon, 29 Oct 2001 00:51:44 -0600
> > To: Datsun Roadster List <datsun-roadsters@autox.team.net>
> > Subject: U20 Timing chain
> >
> > Howdy All,
> >
> > The upper timing chain has just started to buzz. The head has never
> > been off and it has 70k miles so I assume that it is just the usual
> > chain stretch/gear wear. I have a new set of chains/gears but don't
> > want to use them until I go through the engine next spring (I hope!)
> >
> > Didn't I read somewhere (Gordon?) that the upper tensioner can be
> > shimmed to get a bit more life from the chain? It is only driven
> > occasionally but I don't want it to commit suicide.
> >
> > I once knew a fellow who did away with the oil pressure aspect of the
> > upper tensioner. He drilled a hole in the side of the head and
> > installed a screw in the tensioner so he could adjust it manually. A
> > bit extreme I think!
> >
> > --
> > Best regards,
> >
> > Fred Schroeder
> > '70 2000
> > SRL311-13359
> > TDROC
> > Home page http://home.texoma.net/~sitsinwest/
> > Regular e-mail Sitsinwest@texoma.net
> >
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