Sandy,
I noticed you didn't mention replacing the pressure cap (10 lbs., Moss
202-090) on the radiator. Did you replace that? Lack of pressure will
cause it to boil over at a lower temperature. You can also test your
thermostat on the stove top. Heat the thermostat in a pot with water
and a thermometer. Note at what temperature (180 degrees) it opens at
and also make sure it opens all the way. I've found more than one
faulty thermostat over the years. In fact, overheating often ruins the
thermostat, so you might try putting another new one in, just in case.
You can also try running without the thermostat to see if that
eliminates the problem (Moss sells a "blanking sleeve" in case you want
to leave it out #434-135). Last but not least, you could switch to a
colder thermostat (165 degrees, Moss 434-180).
Good luck!
Donny V
1978 MGB
>>> "H. W. "Sandy" McCullough" <hwmccullough@earthlink.net> 5/27/2004
10:07:55 PM >>>
Hey gang,
Well now that the summer is here, my 72 "B" seems to have developed an
aversion to hot weather driving (again). I had thought that with a
new
radiator and thermostat the problem would have been cured, but alas it
has
not. Here's the situation. In any weather over 85 degrees farenheit,
the
engine overheats. In the cool of the evening it runs fine. I have
replaced
(as mentioned above) the radiator, thermostat, flushed the enginge,
replaced
the coolant, verified that there is good circulation and that the water
pump
is pumping. I'm not sure what else to replace / repair.
As usual, thanks in advance for your suggestions.
H. W. "Sandy" McCullough
72 "B" (hot blooded)
68 "B" (being restored)
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