Re: 903 straight 8 fan measurement

Posted by Tim Cole On 2013/5/20 7:34:37

Dear tbird:

That doesn't leave a lot of possibilities left.

Make sure the shutters are fully open. Probably are because the car would overheat at speed otherwise.

Make sure the temperature gauge is accurate. Do you think it is running hot because the radiator level is too high?
It should be level with the top of the core.

If it is overheating then a drop of water should boil when dropped on the back of the cylinder head.

I handled a case once where the car wasn't boiling, but the radiator cap gasket wasn't sealing.

Those old motors don't have a lot of thermal efficiency and rising temperature after coast down is normal. Although a small vacuum leak will cause lean running at idle and raise the temperature. As will late timing.

Finally, one thing Turnquist was crazy about was not overpainting the radiatior core.