Aloha I bought a laser temperature gun and my engine is running at about 220 degrees farenheight after an uphill run. It's lower going down hill by about 20 degrees. Anyone know the maximum safe temperature range for these engines? I have 2 aftermarket cooling fans ... Mahalo from Maui 1969 206 GT Alloy block Gregg
Gregg - what area of the engine did you shoot when reading 220 degrees? The heads will be much hotter, the block a bit cooler, the radiator cooler yet. Check the inflow and out flow ports of the radiator. There should be a 30 degree (or greater) differential when the thermostat is open. Jim S.
ALoha.... That's what I did....lower engine case and water pipes....the heads were about the same temp. gregg
Gregg - I believe that 220 may be correct, depending on which engine structure you measured. The Dino has both water and oil temperature transducers. The oil temp transducer measures sump oil, and the water temp sits in the head. Shooting an IR temperature after the engine is turned off for a minute or two will be misleading, as engine temps will rise absent circulation through the radiator. More information will be gained if you measure the inflow and outflow from the radiator while the engine is running. The delta temp is important. The 220 degrees really does not help much unless you know specifically where you are measuring it. If you point it at the water temp sending unit in the head, or on the bottom of the sump, these should correlate with the gauge reading. However, if you are measuring the temp of the aluminum of the head versus the water at the tip of the sending unit, the aluminum will be hotter. Heat is flowing from aluminum to the water, hence the metal will retain more heat. Jim S.
