No, it is not a difinitive test. However measuring crankshaft
end play is. These thrust washers limit the sliding or walking of the
crankshaft from end to end, It's these washers that hold the crank in
place font to back. I'm sure someone here can give the spec for crank
end play for your engine. Be aware that worn presure plate fingers, and
TO bearing can casue the drop you are seeing. I had it on mine until
the clutch, presure plate, and TO were replaced, after which there was
very little drop in RPM.
Rich
> ----------
> From: Heuer, Paul[SMTP:paul.heuer(at)dsto.defence.gov.au]
> Sent: Wednesday, June 11, 1997 4:48 PM
> To: alpines(at)autox.team.net
> Cc: DSand95510(at)aol.com; GROSS(at)UNIT.COM
> Subject: thrust washers (was clutch in -> revs fa
>
> Hi all,
> Dick Sanders & Jarrid Gross agreed that a large fall in engine revs
> when the
> clutch is
> depressed indicates worn thrust washers.
>
> My car does indeed shed of the order of a hundred or two RPM when I
> depress
> the clutch. So I am concerned at the state of my engine. It shows
> good, even
> compression, and good oil pressure, but the previous owner passed away
> and
> his widow had a 'clean out' of the house so there were *no* receipts,
> papers, etc for the car. By his widow's accounts he was not a
> mechanical-minded person, so I doubt he rebuilt the motor. The
> odometer
> shows 65K miles, but I don't know if that's original.
>
> What is the concern with the thrust washers? How big a job is it to
> replace
> it/them? Is the 'falling RPM' test a definitive test, or should I
> perform
> other tests before wading in here? How long will the engine continue
> with
> the worn washers, and what is the failure mode?
>
> May I suggest this phenomenon be added to the 'Alpine buyer's guide'
> on the
> SOL web server - Daniel Levitin was the author of that page. Are you
> still
> with us, Daniel?
>
> Thanks again for your help, people. I guess I really need to find that
>
> Practical Classics article on the 1592 rebuild now...
> Cheers,
> Paul.
>
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