Oh well, Since I changed water pump, thermostat, and 3 core radiator, my 240z (with L28, triple weber, header, comp cam) dropped water temp from the 240 degree range to 210-225(just past middle line, I would say 60%-70% of the gage. I still have not check the water temp by the cooking thermometer or cheep water temp gage. Is current temp(205-225 degree) safe for my engine?

jaynez31

I just went to buy the candy thermometer or cooking thermometer from Pay less drug store. It was 4.99 dollars.

I just put it in the radiator which showed 190 degree even the gage in the z car indicats 225-230 degree(well over the middle line). When the thermostat open/moving the water, then the candy themometer showed little over 190 degree.

I think this overheat issue is over.

Guess it's time to replace the temp sending unit or go with a mechanical type gauge...the original sendin units have always been known to be innacurate, and the temp guage working properly is probably the most critical.

200-225 shouldn't do any damage if the engine is in good condition, any more than that, or on a high mileage engine could spell disaster.:cross-eye

Of course, 190 is close to perfect...