Subject: Re: Timing Chest Off-More Info

If memory serves me, I believe there is a locating pin
for the top gear. Might be this is sheared off. Cam just
fits into a recess in the rear of the case which also
has a freeze plug which is visible from the rear of the
case. Front is just supported by machined hole in case.

Paul
Richmond, Va

If the top gear is "wobbling" and the noise is coming from behind it
I would guess that the cam is broken. Though, I find it hard to believe that
the engine would run at all if the cam was broken. But that would explain
why one plug was clean and the other was black as one or more valves may not
be opening properly. At this point I would not run the engine anymore until
the cam is checked. If you can move the cam gear straight back and forward a
slight amount that would be normal. If you can tilt the gear at all then
there is a serious problem with the cam or the gear.
To remove the cam you must remove the heads and cylinders so you
can remove the lifters. Then you can remove the nut from the front of the
cam gear and remove the gear. Then there are three bolts that hold the cam
in, once those are removed the cam should slid out towards the front. If the
cam is, in fact, broken then you may have damage to the engine block. If
memory serves me right there are no bearings for the cam to ride in , the
cam just rides in the block. If the there is enough play in the block to
allow the cam gear to wobble it may not be repairable. I don't know if there
is a bearing that could be fitted to repair the block or not. Anyone else
out there know? A used cam and lifters should not be hard to find and should
be replaced as a set.
E-mail me at the address below if you would like to call and I will
send a phone number.

Alan
'74 Eldorado LAPD
MGNOC 4352

Alan R. Dunphy
adun-@midmaine.com
Pittsfield, ME 04967-1426

----- Original Message -----
From: "Keith Ruff" <klru-@fcc.net>
To: <Loopfram-@topica.com>
Sent: Tuesday, September 24, 2002 8:51 PM
Subject: RE: Timing Chest Off-More Info

No stethoscope, can try to find one, but my best guess now is it sounded
like it was coming from behind the top most largest timing gear, which I
gather is the camshaft? I was trying to make sure the valve timing was
on also, there's a white mark on the largest gear, but I can't find a
mark on the middle gear, wonder if the valve timing somehow skipped a
tooth? Also looked like that large gear was wobbling a bit, could have
been just the angle I was looking but I thought it was wobbling a bit.
Also figured it couldn't be the gen as it wasn't connected and I still
got that clacking. I wonder how an engine with a mere 6100 miles could
have developed a mechanical problem so soon in it's life, I can see
gaskets and such from sitting but not mechanical, who knows.....

Keith
Robert Hawkes wrote:

Keith,
I don't know where you live but I bet it's not in New York.
Anyway, do you have access to a stethoscope to listen around the block
and
focus in on the sound? Bob
----- Original Message -----
From: Keith Ruff <klru-@fcc.net>
To: <Loopfram-@topica.com>
Sent: Tuesday, September 24, 2002 5:26 PM
Subject: Timing Chest Off-More Info

Fired up the beast with cover off, put a towel up front to catch the

oil

mess. The clacking is coming from the engine case indeed, almost

sounds

like the camshaft area behind the pulley in the timing chest. Can't

the gen as it is not hooked up. Looks like a teardown.

Keith Ruff wrote:

Broke the nut loose on the crank, got the timing chest off, nada to

found as far as I can tell. All teeth on the gears look fine. There

some minor movement on the oil pump gear, but nothing that would

cause

the clatter I am hearing. Ordered up a new cover gasket and crank

seal

for the cover and will re-assemble. Checked the valves and they

appear

OK, clearance is right on the money. Did notice the left plug was
blackish and slightly wet while the right one was perfect, could

just be

a carb adjustment on the left side. Have no clue what to do from

here

except hand this off to a professional. I wish somebody lived

nearby

who could stop by, take a listen, and tell what the clack is wrong

with

her. Perhaps it is the rod bearings, who knows. I give up.

Keith Ruff
71 Police Ambassador - NJ

Keith Ruff
71 Police Ambassador - NJ

Subject: Re: Timing Chest Off-More Info

Author: Paul Linn

Date: Sep 24, 2002, 7:11 PM

Post ID: 1711078406

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