02-06-2016, 10:19 AM | #1 |
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Thermostates
A have 2 barrel type thermostats for use in a 36 ford. I teasted them in water. One has a tight seal and opened up at about 175. The other does not seem to close tight and fully opened at about 165. Am I right to say that the thermostat that does not close tight and is not good.
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02-06-2016, 11:17 AM | #2 |
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Re: Thermostates
Yes
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02-06-2016, 11:23 AM | #3 |
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Re: Thermostates
That is what I thought crap
Thanks for thr reassurance
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02-06-2016, 01:38 PM | #4 | |
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Re: Thermostates
Quote:
engine and take a long time to open. When a small amount of coolant flows through at startup warm coolant opens the stat faster. Has nothing to do with the operation of the stat after it is open. G.M.
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02-06-2016, 02:28 PM | #5 | |
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Re: Thermostates
Quote:
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02-06-2016, 06:33 PM | #6 |
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Re: Thermostates
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02-06-2016, 06:47 PM | #7 |
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Re: Thermostates
My thermostats each have a small hole (1/16) drill size, and NO stopper in the hole.
You need a small bleed hole in the stat, so when you fill it with coolant, the trapped air can bleed out of the engine, the coolant can fill the block and heads completely. .
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02-06-2016, 07:36 PM | #8 |
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Re: Thermostates
They don't have to close tight like a valve, .020 or .030 gap on one side isn't going to leak that much coolant. I would question trying to see EXACTLY when they open in a pan of water??? Put them on the engine, run them and check the temperature on the head outlets with a laser pointed thermometer. You can swop thermostats from side to side to see the true picture. G.M.
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02-06-2016, 07:54 PM | #9 |
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Re: Thermostates
This gap is 1/16" you can fill in the spring that one has more tension on it then the other.
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02-06-2016, 10:33 PM | #10 |
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Re: Thermostates
If you have already made up your mind that one of them is defective then there is not much to discuss. Seems you have two ways to go, replace it or test it in the car as GM suggested and see how it preforms in an operating system. What other options do you have? Flatheads often run at different temperatures on each side, so you would most likely have to switch them to truly see how they are working.
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02-07-2016, 06:25 AM | #11 | |
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Re: Thermostates
Quote:
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02-07-2016, 10:04 AM | #12 |
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Re: Thermostates
I didn't realize you had the option to return it! If that is the case that is what I would do.
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02-07-2016, 11:02 AM | #13 |
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Re: Thermostates
Thank you for all the help. This is a great place for information
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