[Roadsters] U-20 Upper Tensioner Diameter?

[dave]

I don't think so, it's a much shorter chain, so slack/backlash is less of an
issue.  Average American V8 has a chain the same size and no tensioners at
all.  The tensioner for an Austin Healey and many other British engines is
almost identical to the R16, but it ratchets and locks as the slack occurs.
Nice design.  I was going to order one for the stroker to see if it would
work.

Dave Brisco

-----Original Message-----
From: MH [mailto:twobeaners at earthlink.net]


I've been meaning to ask this question before, when the subject of shimming
chain tensioners has come up. Is there the same benefit of doing this on the
R16 timing chain tensioner?
Mike Hudson  '67 - Stroker / 5-speed


----- Original Message -----
From: "dave" <daveandlindab at comcast.net>


> FWIW, Copper sealing washers may be ideal, thin profile and durable.
>
> Dave Brisco
>
> -----Original Message-----
> From: Todd Osborn [mailto:todd.osborn at sbcglobal.net]
> >Gordon said:
> >0.565" on the tensioner shaft.
> >A 9/16" washer has an ID of 0.5625", so probably a little too small.
>
> The nominal ID of a 9/16 washer is 0.594 which gives you about 0.015"
> clearance which should be about right. Gordon's right you will need to
grind
> a flat on one side to fit. I like idea of using Nylon or Delrin; but the
> long term service temperature of these materials is fairly low (~200F) so
> I'm not sure how they would do in hot oil. Maybe a cut down brass washer?
> Todd Osborn (DATSFUN)
> San Jose, CA