** Reply to message from Bob O'Shaughnessy <vanagon@COLUMBUS.RR.COM>
on Tue, 3 Nov 1998 17:58:12 -0500

Having read Bob's excellent description of a truly tedious procedure,
I am *not* going to replace my oil pump without a better indication
that it is truly the problem.

 While brazing up  a hole in the exhaust collector-pipe (to hold me
until Bus Depot order comes in) I noticed an odd
groaning/scraping/squeaking noise from the running engine.  Sounded
like a dry shaft or even possibly a squeaking belt.  I listened all
over with a stethoscope, never heard anything that seemed abnormal
except that there was quite a commotion going on in the pipe that
returns from the right head to the thermostat -- don't think that's
connected.  The noise would occasionally stop while idling, but would
start again if I revved the engine.  It would increase in pitch with
the revving engine.  On my closing the throttle, it would decrease as
the engine came down to idle, then change character slightly for a
couple of seconds and return to original.  This short change was
consistent, every time just after the speed returned to idle.  The
noise got flatter somehow, and possibly increased in pitch just a
trifle.

I took off the belt (no A/C or P/S) and the noise remained, so not
water pump or alternator or belt.  The back end was up on ramps, so I
let it down, tried again -- same noise.

Today I tried the engine twice and no funny noises at all.  Listening
with the stethoscope, the above-mentioned coolant pipe again started
making a racket as the thermostat began to open.  And the more I look
at the oil pump assy, the less I can imagine it making this sort of
noise -- the thing is pretty much bathed in oil, including the drive
shaft, right?

Has anyone got a clue?

thanks
david

> David Beierl (dbeierl@IBM.NET) said on the date of 11/3/98 4:09 PM
>
> >Can someone give me a notion of how much stuff has to come off in
> >order to remove the oil pump on a digijet engine?  Bentley has a
> >lovely drawing which assumes that the engine is out and the
crankshaft
> >pulley removed... :(
> >
> >thanks,
> >david
>
>
>      I just did this repair on my engine as I had put the thing
together
> wrong during the rebuild.  It wasn't hard, just time consuming.

<excellent instructions snipped>

David Beierl <dbeierl@ibm.net>
401 274-5827 voice, -6349 fax
OS/2 V4, FP7, JVM 1.1.6, JSM 98.6.3