Engine running cold
#1
Join Date: Oct 2005
Location: northwestern Ontario
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Engine running cold
Hello, was able to take my panel out for another run today, the temperatures are quite a bit cooler now, in the 40*'s F(5-8*C) and the engine coolant temps which should be at 100*C is barely reaching 70*C. Not sure what to check, I'm running a 195* thermostat in a 5.7liter sbc, headers and 2 1/2" dual exhaust, it has the original stile radiator 4 row core that I bought from Midfifty. Any suggestions??
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#11
A cold running engine is going to be the thermostat. It is either opening too cold, sticking open, or is being bypassed too much.
#12
Most likely the thermostat or bypass, as suggested. Be aware also, that trucks with very large cooling systems run covers in front of the radiators to minimize air flow when they're running in very cold temperatures. It has been my experience that you really don't need any fan when the temperatures drop below the 50 deg F mark. Back when, I drove a '52 Mercury without a fan year round. Not much traffic back then where I was. Just had to "time my stops so as to not remain stopped very long.
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Yes John I would also try the cardboard first. Than drive it
a lot so as to make the thermo work. If a chunk of crud is
holding it open it may then work it's way out. This has
worked for me in the past. And on new engines that should
be clean with now chunks. Go figure. Maybe the stat is just
sticky from some coating put on at the place it was built.
But either way making it work by forcing the heat with cardboard
worked for me and saved changing it out.
Also Jim is right on as to how to check it.
a lot so as to make the thermo work. If a chunk of crud is
holding it open it may then work it's way out. This has
worked for me in the past. And on new engines that should
be clean with now chunks. Go figure. Maybe the stat is just
sticky from some coating put on at the place it was built.
But either way making it work by forcing the heat with cardboard
worked for me and saved changing it out.
Also Jim is right on as to how to check it.
#15
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Well hopefully this weather will hold out so I can take it for another spin, I have no plans on running it through the winter when our roads are covered in salt. Unfortunately I'm back to work for the next 7 days and will not likely get a chance to take it out until I'm off again. I'll do what has been suggested and thank all you fine gents for your help.