Cooling system question.
11-02-2011, 08:45 AM
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Cooling system question. Hello, I am just finishing a 46 Chevy pickup truck streetrod project which has a LS1/4L60E combo from a 2000 Camaro. I am using a Griffin all aluminum radiator that was built specifically for that year truck with a LS1. My question is why does it seem that the lower radiator hose doesn't get hot? I am using a 180 degree thermostat and the fan turns on at 185 degree. The engine temp never goes over 195 degree. Do I have a problem? The people at Griffin tell me that the combination of the great cooling system in the LS1 and a very large all aluminum radiator is why the lower hose stays cool. What are your thoughts? Thanks, Al.
11-02-2011, 09:11 AM
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I am using a Dakota Digital dash with their supplied sending unit. I have no way of reading the PCM. The PCM was reset by Painless Performance to match my application.
11-02-2011, 09:19 AM
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Do you have a diagnostic port in the harness? IMO getting a reader from like autozone will read temp that the PCM sees. Could be a case of really good cooling, and a well insulated hose.
IF I was really curious, I would test the opening temp of the thermo in a pot of boiling water and candy thermo to see when it actually opens. Then with a infered gun I would hit different spots and see what the actual temps are once the system is running and up to operating temp.
IF I was really curious, I would test the opening temp of the thermo in a pot of boiling water and candy thermo to see when it actually opens. Then with a infered gun I would hit different spots and see what the actual temps are once the system is running and up to operating temp.
11-02-2011, 11:02 AM
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Like stated above, verify engine coolant temp with a PCM scanner. If it's really 195°, then I wouldn't worry about the cool hose since the engine is obviously warming up.
If you want to make it a bit warmer on average, you could bump the T-stat temp to a stock LS1 T-stat (187°F unit). You could also raise the fan on/off temps. My experience is that NA LS1s run best between about 190-210°F, so you are already in that range.
If you want to make it a bit warmer on average, you could bump the T-stat temp to a stock LS1 T-stat (187°F unit). You could also raise the fan on/off temps. My experience is that NA LS1s run best between about 190-210°F, so you are already in that range.
