First, are you sure that it isn't a valve adjustment problem? Also, are you
low on oil? Check that before you panic.
As to the shims, I made a set of shims from some standard hardware store
washers. I did have to grind off one side so they would fit, since the
tensioner shaft is fairly close to the engine side of the tensioner block.
Unfortunately I can't find those shims, so I can't tell you for sure what
size they were.
But I did take some measurements that might help. The tensioner shaft is
0.565" OD. That puts it between 9/16" (0.5625) and 19/32" (0.5937), so if
you can find some 19/32" ID washers at the hardware store, you can fake it
with those.
I also found a set of custom shims in my stuff. I think I got them from Dick
Tillinger many years ago (I really should get my garage organized). These
shims have an ID of 0.60" and an OD of 0.90", so those are the dimensions
you are shooting for.
I would advise addressing this as soon as possible. If it is making noise
all the time (and it isn't valve adjustment), that's not a good thing.
If you can wait a few days, I can send you the set of shims and a couple of
tensioner gaskets. I just can't get them in the mail before Monday. If you
want to do that, reply to me offline with your mailing address.
Gordon
-----Original Message-----
From: datsun-roadsters-bounces+gsglasgow=comcast.net@autox.team.net
[mailto:datsun-roadsters-bounces+gsglasgow=comcast.net@autox.team.net]On
Behalf Of Matthew A. Smith
Sent: Saturday, January 26, 2008 12:52 PM
To: datsun-roadsters@autox.team.net
Subject: [Roadsters] Death Rattle? Input DESPERATELY requested
Hi folks,
Loreli's U20 "heart" has begun to have a "murmur". I noticed a rather loud
noise (this came after a few days of having "fun" on some wet streets and
parking lots). This isn't a little rattle at start up then disappears, as
Gordon's site suggests. (Thank you Gordon, I LOVE your Garage!). This is a
somewhat more serious problem I fear.
I have a noise that is coming from the front-top of the engine. I pulled the
valve cover, used tin foil as a temp valve cover to avoid the spray of oil,
and now am convinced that this sound is coming from the upper timing chain
area. I used Gordon's suggestion on rolling backwards in second gear, and
confirmed that the chain touches the "Evil-L" (and still has a little
slack). There is still over a 1/3 inch of piston showing on the tensioner
with the "tight" side of the chain being ON the tensioner. Here are my
questions:
What ID and OD washers should I be looking for to temporarily fix this issue
(shims)?
Do I have a month or two of limited/normal driving (50-100 miles per week?)
prior to replacement of the chain? I go back to work on Monday after 6
months off. I need a temp fix AND a month or two to get back to "financially
solvent".
Can I make my own gasket (temporary) from some paper gasket material?
Your help desperately needed ASAP!!!
Matt
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