Chuck, I can only help a little on one of your problems. The loss of water
is probably due to a leak in the head gasket. I recently bought a kit to
test for combustion gas in the coolant and found it present in my TR6. I
had a similar problem, but it would fill my quart coolant catch tank and get
the water level low enough to overheat the car. I changed the head gasket
and used Hylomar sealant. I think I got the leak fixed now. Still runs a
bit warm though, next is an aluminum radiator.
Charly
----- Original Message -----
From: "Chuck Arnold" <chuck.arnold@oracle.com>
To: <Fot@autox.team.net>
Sent: Saturday, June 26, 2004 10:19 AM
Subject: Problems on the track
> Did a track day yesterday -- first time out with a lot of changes.
>
> Three strange problems:
>
> A lot of "shaking" on heavy acceleration -- hope it is just the prop shaft
out
> of phase, else I face a lot of investigation. It is a newly rebuilt short
> block by a very good builder. Pretty sure all is balanced well. Hope it is
not
> the flywheel coming loose -- though I drove at least 100 hot laps with it
and
> had no external manifestations of problems. Perhaps it could be some part
of
> the motor mounts not tight -- bud did tighten them well I am sure. Any
other
> ideas on where to check?
>
> The second problem is disappearing water. The sessions last twenty
minutes. By
> the end the water temp is up to 240. When I check the overflow bottle
after
> the sessions, it is half full. The radiator is down two quarts. I see no
> evidence of water leaks in the system. Where is it going?
>
> Third --oil pressure. This is a brand new engine, new oil pump. Now has
250
> miles on it. Has .04 over forged AE pistons. Accusump, pan baffles..
External
> oil feed to number one cylinder. Engine has 50 pounds oil pressure when
cold.
> As it warms up, the pressure drops to 24-24 pounds. Never saw it go lower,
but
> my warning light [which comes from a different sensor than the oil
pressure
> sensor] that comes on at about 27 pounds was lit for most of the sessions.
So
> -- it this too low? If so, what can be done to improve it?
>
> The car performs well. Pulled 6200 RPMs in 5th [Toyota Transmission] at
the
> end of the straight at SIR {Now Pacific Raceways} which means about 125
mph.
>
>
> Chuck Arnold
> Technical Manager
> Oracle Northwest Fulfillment Practice
> 425 241 0457 [cell]
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