black35

A friend has a 64 coupe 365 horse, it is running a little warm New DeWitts, hoses,clutch fan, everything new ecept water pump looking for suggestions on what might be wrong gauge is new also HELP

Frankie the Fink

First and foremost and always in these issues is to confirm its REALLY running warm...the temp sending units are notorious for reading high. An I/R temp gun aimed at the thermostat housing on the hot car will do the job to validate the gauge reading.

tbarb

If it's not loosing any coolant, in addition to what Frank suggested make sure the COLD coolant level is halfway (maybe 3/4) in the expansion tank. If it gets to high the cap will allow some to overflow out. Make sure the radiator cap is good and relieves at 15 lbs. The reproduction caps are not really good, look for a older AC made in USA RC-26 cap.

Where is the initial timing set and is the vacuum advance working properly.

JohnZ

Read this and learn how your Corvette cooling system works and how to properly diagnose and repair it:

black35

Bought a IR gun to read temp Where is the best place to measure the temp to ge a accurate reading for running temp

new vette 62

The thermostat housing is what I use to check the temp. I also do the top and bottom hoses for a differential reference. Hot going in cool going out. My temp sender is off by about ten degrees.

leif.anderson93

And, hold the IR gun no further than 6" from the area you are wanting to read...much more accurate