low temperature in 65

[65BLUBIRD]

Because of leaks, I recently had my radiator recored and the supply tank replaced. The recore is a higher efficiency cooling than the original. The gauge in the car was working fine before the work. The gauge does go up a little but not to the middle where it was before. When I turn the engine off with the key on The gauge does creep up higher. Am I right in thinking the new thermostat is a defect and I am not having a problem with the gauge or sending unit? I am located in so cal so I am not too worried about getting this fixed right away. If I block the radiator with cardboard, how long should I run from a cold engine to determine if thermostat is problem?

[redbird1]

Five minutes at idle should bring the engine up to normal operating temperature.

Bob.

[boaterbob]

I would buy or borrow a infrared laser gun and check what the temps are at certain spots on your car gauge. What temp range is your thermostat? 160, 180, 195 ???

[bondobird]

My gauge only moves a little also. Sounds like your new radiator keeps things a little cooler than before. Don't worry......be happy. Ride on, brother.

[65BLUBIRD]

Thanks for the good ideas. Is the temp sending unit on the intake manifold directly behind distributor? There is a taped splice in the wire I am going to check. Repair manual says sending unit is on the block but vague on location. Does give a good picture of the gauge on the dash though.

[tb65m66]

My '65 has it in the intake like you described.

[65BLUBIRD]

I have been driving the car around and it is running fine. I am guessing the the higher efficiency radiator recore I had done makes it run lower and the thermostat may be lower than the one that is in there. In traffic the guage goes to just a little below mid level. All is good and driving great.