Re: 55 Caribbean Over Heating

Posted by Gar On 2020/8/6 18:39:55

Several issues could be causing your hot issue.

Do you know your water pump is actually pumping water?(impeller working, bearings good)

What is the percentage of Antifreeze to water? (check with antifreeze tester)

Is you radiator working correctly? (no blocked or bypassed tubes) Some repair shops will bypass spots in the radiator that are leaking. Any abnormally hot/cool spots when you start your cold motor?

Radiator hoses ok? (no sharp bends or kinks)

Heat core working correctly (not plugged/damaged)

Oil pressure, type, and quantity correct (oil reduces heat and friction. If you are down 1 qt it can cause your engine to run 10-20% hotter)

Exhaust ports and exhaust system good? (too much back-pressure will keep heat in the engine)

Water pump belt is the correct belt and is tight.

After you flushed and drained your radiator, how much fluid and distilled water did you back? Was it the same amount as the manual indicated? (Usually you need to flush the system three or four times with out the thermostat and ensure the heater core is getting flushed as well)

Is there a specific way the manufacturers recommends to refill your radiator? (they may do this to reduce air bubbles which would stop coolant from moving thru the engine correctly)

You should also check to ensure your carb is working correctly. Not too lean or rich.

Is your timing correct? (late timing can cause a slight overheat condition, then added to a bent hose, low oil pressure, etc can cause a significant issue)

Finally, verify that you are not adding any fluid and have no leaks. If you add fluid but do not have leaks it could be the head gasket leaking.