Overheating Issues!

Highway speed pushes alot of air throught the radiator. If you are overheating at highway speed, the fan and shroud (or lack of) are not the cause of the overheating.

The radiator cannot get rid of the heat produced bythe engine. look at the following:

1. leaking head gasket will be evident by the cooling system becoming pressurized very quickly after starting the car, and you may be able to smell the exhaust inside the radiator with the cap off. Also with the cap off and engine running, you will also see air bubbles in the coolant.

2. Clogged radiator preventing coolant flow and poor heat transfer. Take the radiator out and force water into the lower hose outlet and see what flows out of the top of the radiator. you may need a radiator shop to flush it properly.

3. incorrect ignition timing. Retard the timing enough and you can overheat just about any motor. Check your timing.

4. too much antifreeze in the cooling system. Even in the coldest climate, you should never run more than 60% antifreeze. Pure Antifreeze has very poor heat transfer qualitities. You must mix with water for it to work properly as a coolant. In hot climates, 30% antifreeze/70% water is all you need for corrosion protection.

Start with # 4 and work your way backwards to #1 to solve your overheating problem