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August 23, 2003
Brad,
A couple things. Hopefully you have dodged a bullet. I have heard
stories of A-series engine overheated to the point of seizing up
but running again once cooled down. I'm not saying that no
damage occurs, but while not good, not necessarily fatal either. I
would keep an eye on your oil because symptoms could be
delayed. A weakened head gasket or crack around a valve could
develop problems later.
Other things I've seen as evidence of overheating are damage to
pistons and rings from the swelling. Pistons will show
significant scuffing on the skirts where they hit the cylinder walls
and I suspect that this can also cause rings to break. This would
probably cause some damage to the cylinder walls as well.
A-series engines can develop piston slap, so the overheating
will probably exacerbate the problem. The other problem is with
bearings. The extra heat thins the oil and the metal expansion
could cause a bearing addition wear or failure. As you kow the
bearing metal is relatively soft. I would guess that anywhere you
have close tolerances and metal to metal contact. you have
potential problems. This would include the oil pump, cam, cam
bearings, etc.
These are all possibilities, but there's no way to know for sure
without inspection. I'd just keep a close eye and ear on things to
catch any problems that may develop. I guess a lot deoends on
how long you were driving it with high temp. Hopefully you'll be
fine
Sorry, but you asked...
Gerard
"gerardchateau" < pixelsmith@... > 24662
Posted on August 23, 2003 06:57 PM
Posted to category(s) Cylinder Head | Engine (external) | Engine (internal) | Gauges | Lubrication System | Miscellaneous | Technical Info
