Does it go through this cycle while you are driving down the road at a
steady rate?
Can you tell what prompts it to cool down?
First suggestion is to change the cap. If it is not already a closed system
with an overflow reservoir, I would convert it. Be sure you use a
closed-system cap.
A possibility is that air in the system is degrading the heat transfer. The
'bubble' can also insulate the temp sensor, so it may look like it's running
cooler, but in fact it's still hot, but the gauge cannot read true.
Rex Burkheimer
Marketing Director
WM Automotive Warehouse
Fort Worth TX rex@wmautomotive.com
----- Original Message -----
From: Mark Purtell <purtell@students.uiuc.edu>
To: <british-cars@autox.team.net>; <mgs@autox.team.net>;
<shop-talk@autox.team.net>
Sent: Monday, July 24, 2000 6:07 AM
Subject: Cooling Problem
>
> I just bought my first MGB-its a 1977, and I believe that it is 100%
> stock. The car overheats after driving it for 20-30 minutes, and then it
> will stay in overheat for a 1-3 minutes and then return to normal
> operating temperature, only to have the whole process occur again at a
> later time. I have replaced the thermostat (195 degrees), and the
> temperature sensor. I have noticed that the lower radiator hose doesn't
> build pressure even when the car is warmed up/overheating.
>
> Any suggestions?
>
> Mark
>
>
|