Hot-running LS6

[Chevy454]

Lots of good answers on the topic at hand. Thermostat, good system check, and timing check should all be on order. Timing plays a big factor, but if it starts/runs well, then you should be close. And, the range you describe is normal for these cars. Heck, that's actually a little cooler than where some of the newer cars run. One thing that is easily overlooked, though, is "pressure". Any idea what radiator cap is on it?

Care for some food for thought...?

Low coolant temperatures DO NOT necassarily indicate a well functioning coolant system. If there is no heat transfer between the metal and coolant, then you've got the low coolant temp you're looking for, but you're engine's temp is actually higher. If there is heat in your coolant, then it's doing it's job. Something else that is of help is to get an infrared temp gun and check and see what the engine's temp is actually at, versus what the coolant temp is. If the coolant isn't taking the heat away, but is giving you a low guage reading, then that's really just a fasle sense of security...

[mmcporter]

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Lots of good answers on the topic at hand. Thermostat, good system check, and timing check should all be on order. Timing plays a big factor, but if it starts/runs well, then you should be close. And, the range you describe is normal for these cars. Heck, that's actually a little cooler than where some of the newer cars run. One thing that is easily overlooked, though, is "pressure". Any idea what radiator cap is on it?

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<font color="blue"> Great tips Rob. Everyone has had something good to add, and if you add up all the responses, there is a great body of knowledge on supercar cooling systems here. As far as the radiator cap, it is a repop of the original GM cap from Ground Up Restorations. </font>