337ci flathead thermostat?
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337ci flathead thermostat?
Working on my 337ci flathead. Pulled the thermostats to check them. Think one may have been in backwards but wasn't paying enough attention when I pulled it apart. The current ones are 160'f. What is the correct value thermostat for my 337ci flathead? I have read in the forum that 180-190-195 might be better because flatheads done like running cold. I already have some overheating issues but that is another thread.
John
NNY
John
NNY
Fleet Owner
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From: NM
Keeping in mind that the rated temperature of thermostats is their opening temperature, not the temperature they keep the engine, 160's are OK for your engine. If you find it is running too cool, then step up a notch.
Cargo Master
Joined: Aug 2010
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From: Houston
The temperature on the thermostat is full open temperature. The thermostats will start to open below the rated temperature and hit full open at about the rated temperature. I use different temperature thermostats in different vehicles based on how each engine behaves. My 37 likes to run warm, so I have 160 degree thermostats in it. My 53 likes to run cold, so I have a 195 degree thermostat in it. My dad's 40 runs at about the thermostat rating, and we have 180 degree thermostats in it. I like my vehicles to run about 180.
Cargo Master
Joined: Aug 2010
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From: Houston
Interesting. My experience is quite a bit lower tech than that. I have put several thermostats in a pot of water with a 200 degree Celsius mercury thermometer and observed the temperatures of the thermometer when the thermostats hit full open. I typically do this when installing new thermostats to make sure they don't stick closed or open. I think most of the thermostats I have conducted my crude experiments with were from one manufacturer, so that may be why I have gotten fairly consistent results. Thanks for posting that, I saved a copy of it.
Hotshot
Joined: Oct 2009
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From: Burbank, WA
We are sorry, but do to a running error, this thermostat will have to close now. You may lose any and all unsaved parts from your very expensive engine you have just built. We regret any inconvenience of stranding you on the side of the road.
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If it was made by GM, the thermostat would have a 3 year life span, cost about $76, require a special tool, dealer charges $320 for labor and hazardous material, and require the computer to be reprogramed for another $560. "See you back in 3 years"
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