John,
I went through a similar problem with my old Volvo P1800. So I
understand how frustrated you must be at this point and that changing
the fan seems the easiest way to attempt a cure, however if the fan and
air baffles on the two BT 7's are the same and one over heats at idle
and the other does not, then it seems likely that the problem is
something other than airflow. As others have suggested, it may be due to
restrictions in the flow of coolant in the block, head, hoses etc. These
may be minor and the water pump can overcome them at high rpm but not at
idle( just an uninformed guess).
I would certainly make the airflow modifications that you plan to do but
I would also look for another problem BEFORE changing the fan etc. as
they may cool things down and hide the real cause of the over heating.
On the bright side, just think of the satisfaction you will have when
you solve the problem!
Bob Tarwater
John Snyder wrote:
>Thanks to all the people who replied to my post re overheating at idle.
>
>Other than the stuff I have already done and checked, the common threads were
>to double check the baffles that feed air to the radiator ( they are original,
>but I am going to seal them to the sides of the radiator), try a fan w/ more
>blades, and DO NOT mess w/ the blade pitch.
>
>Norman Nock suggested just using an extra stock original blade, giving a total
>of 6. I had considered doing that. I have the fan for the car I'm currently
>restoring, and will steal a blade from that if sealing the baffles does not
>work.
>
>Thanks again
>
>John
|