Yes, that's the "Death Rattle." It normally happens on startup because the upper
timing chain tensioner is the LAST part of the engine to get oil pressure, so
the chain is running pretty slack at that point. That's why, in the early
stages, the Death Rattle goes away after a few seconds. As the chain wears and
stretches, it lasts longer and starts happening when you lift off the throttle
from moderate-to-high revs.
The oil filter tube was an attempt to partially alleviate this problem by
keeping the filter full of oil and allowing pressure to build up faster. Without
the tube, the pump has to fill the filter before any pressure starts to build,
even in the main oil gallery (see
http://www.gordon-glasgow.org/Images/U20_Lubrication_System.JPG).
Gordon Glasgow
Renton, WA
-----Original Message-----
From: owner-datsun-roadsters@autox.team.net
[mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of Ken Pearce
Sent: Wednesday, May 16, 2001 9:14 AM
To: datsun-roadsters@autox.team.net
Subject: The "Evil L" vs "Death Rattle"
One other associated question with the Evil L. Is it responsible for the
"2000 Death Rattle" or is the death rattle noise from the chain hitting
something else? Like the timing cover...
Thanks for all the responses, they are most helpful. I'm torn between
shimming the upper tensioner and just breaking the L off. If I shim, how
long before the tensioner wears and I have to shim again...
(Ross, got any washers cut for shimming?)
Ken Pearce 68-2000
Bellingham WA
http://titan.cc.wwu.edu/~pearceke
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