Although many good suggestions have been made it has been my experience that
it is the system's ability to dissipate heat, rather than variations in the
amount of heat generated that is the usual cause of overheating problems (
ignition timing and leaking gaskets excluded of course)
I would suggest that the air deflectors around the radiator be carefully
checked to ensure that no air is coming back past them and into the front of
the radiator.
Failing that I would recommend swapping the radiators between the 2 cars to
see if the problem moves with the radiator.
Diagnosis is 90% of the cure.
That will be 2 cents please.
Michael Salter
http://www.netbug.net/blogmichael/?p=445
-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of GUY DAY
Sent: Sunday, July 05, 2009 8:55 AM
To: Oudesluys
Cc: healeys@autox.team.net
Subject: Re: [Healeys] thermostat discussion
Kees,
I fully agree with your comments but suggest it is probable (although not a
certainty - it could be poor engine timing) that in this case it is the
friction in a newly rebuilt engine. When that goes so the temperature
should drop to similar levels to the other engine.
Relating this to your explanation - I am suggesting the overload is the
additional friction from the newly rebuilt engine, when that goes so will
the higher than wanted temperature.
Time (and engine use) will tell.
Guy R Day
OL11
----- Original Message -----
From: "Oudesluys" <coudesluijs@chello.nl>
To: "GUY DAY" <grday@btinternet.com>
Cc: "Alan Seigrist" <healey.nut@gmail.com>; <healeys@autox.team.net>
Sent: Sunday, July 05, 2009 12:00 PM
Subject: Re: [Healeys] thermostat discussion
Guy,
"A thermostat cannot control heat beyond it's maximum opening
temperature" is absolutely true. Problem is idealy the coolant should
never get that hot, certainly not when running in, as it is a sign of
overload..
I have always used thermostats with a high as possible opening
temperature in any car. This increases the operating temperature and
efficiency of the engine. It also increases the temperature reading, but
in my experience this reading will remain constant at all times (new
engine, old engine, rebuild engine), unless overloaded (mountains, very
fast German autobahn driving) when the temperature will creep up and
slowing down is needed.
(all assuming that the engine and cooling system are in good nick).
Kees Oudesluijs
NL
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