Tom,
timing chains V timing belts is an interesting one.
Nissans latest generation VQ series engines (for example) have
reverted to chains to drive the OHC.
I read somewhere that the car manufacturers were not getting the
longevity from the rubber belts that were promised in the glossies.
That has led to the re-appearance of the ubiquitous cam chain.
Generally, unless other factors intervene, the chains only get renewed
at engine recondition time. That is certainly more than your 100,000K
or 60,000M interval!
I have had experience with both technologies and I really do not have
a preference.
The belt is very quiet and oil free however the chain is also quiet
(normally) also because it is enclosed within the engine.
My Nissan RB30 engine uses a tensioner roller but it is adjusted only
when you instal a new belt, then locked in position.
Your typical chain has dynamic tensioning to automagically compensate
for gradual stretching.
I have seen a Hyundai twin cam head that had broken its rubber band,
not pretty.
16 bent valves and 4 scarred pistons and, reportedly, the belt had
been changed at the recommended intervals.
Just my contribution to your wonderings.
Regards,
Graeme Suckling
1965 SP310 - under construction DSOA Member # 112
1971 P510 4 door - daily driver, original owner, highly modified.
1972 PL510 2 door - in storage.
1973 HS30/240Z - re-building to 2003 specs.
www.imagestation.com/mypictures/index.html
Adelaide, South Australia.
-----Original Message-----
From: owner-datsun-roadsters@autox.team.net
[mailto:owner-datsun-roadsters@autox.team.net]On Behalf Of Tom
Reynolds
Sent: Wednesday, 30 April 2003 4:35 PM
To: datsun-roadsters@autox.team.net
Subject: SRL311 ?s
Just some miscellaneous things I've been wondering about for a few
days now;
Timing chain-timing belt? Time/mileage sensitive, when to change?
Parts availability in U.S.? Good for all things, are some
"unobtainium?"
Parts/procedure/service manuals available?
0-60 time for original U.S. spec cars? Gas mileage figures of current
drivers?
Any problem getting insurance? "Datsun" not insured by some
companies, or
because of age of car?
Thanks very much
Tom Reynolds
Hereford, AZ
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