Just bought myself a bird with a 582 Blue head. I noticed on a run up test (4000 RPM) that the (analog) temp gauge wouldn't climb higher than 120 or so, and EGT readings topped out at 800 or so. Seems a little on the low side? Possible thermostat stuck open?
I would suggest that you check the calibration of the coolant temperature gauge. Remove and reconnect the sender and ground wires it in a pot of heated water. The same procedure as testing in the video. I would then test the thermostat since your all set up to test temperature.
Great question Jim. The manual says 180° f maximum. If your referring to the “Engine Run In Procedure” as the test phase, the chart states when it hits 180°f let the engine cool off and restart where you left off. The mean or average coolant temperature should be 150° f. I do know for a fact that at 240°-250°f coolant temperature the engine stops due to piston seizure. Too strong an anti freeze mixture will result in high coolant temperatures. No more than 50/ 50% mix for winter then in summer less anti freeze to water ratio. Water is way better coolant than antifreeze is.
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A test that is so easy, and can save a heck of a lot of money in repairs. Cheers from Winnnipeg.
Absolutely could! Thanks for your comment
That technique would be useful to test just about any engine thermostat. Good to know that.
Glad you enjoyed the video! Just find the specifications for the particular model thermostat and test away.
Just bought myself a bird with a 582 Blue head. I noticed on a run up test (4000 RPM) that the (analog) temp gauge wouldn't climb higher than 120 or so, and EGT readings topped out at 800 or so. Seems a little on the low side? Possible thermostat stuck open?
I would suggest that you check the calibration of the coolant temperature gauge. Remove and reconnect the sender and ground wires it in a pot of heated water. The same procedure as testing in the video. I would then test the thermostat since your all set up to test temperature.
What temperature is critically high? The manual says 180 I believe they regularly see higher. Temperatures are during the test phase.
Great question Jim. The manual says 180° f maximum. If your referring to the “Engine Run In Procedure” as the test phase, the chart states when it hits 180°f let the engine cool off and restart where you left off. The mean or average coolant temperature should be 150° f. I do know for a fact that at 240°-250°f coolant temperature the engine stops due to piston seizure. Too strong an anti freeze mixture will result in high coolant temperatures. No more than 50/ 50% mix for winter then in summer less anti freeze to water ratio. Water is way better coolant than antifreeze is.
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Glad you enjoyed it!