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  #11  
Old 07-25-2017, 07:25 PM
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jopizz jopizz is offline
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Quote:
Originally Posted by tbirdmike63 View Post
I put the new hose on, added some coolant, let it run, but I couldn't get the temp. To go over 181 degrees, I think I have a 190 degree thermostat, the coolant was bubbling and moving around, so I shut off the car, do you think it's ok? Thanks!
You probably didn't let it run long enough. Let it run until all the bubbles are gone. If the coolant was moving then the thermostat opened.

John
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  #12  
Old 07-25-2017, 07:34 PM
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Yeah, I replaced the coolant that i took out, it was pretty nasty, I figure I will drive the car, get it up to operating temperature and watch the temp gauge, then add more if needed.
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  #13  
Old 07-25-2017, 07:37 PM
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Quote:
Originally Posted by Ladysmith Bob View Post
I probably should have made the rational behind drilling holes in thermostat available, but it was early in the morning and I wasn't quite sharp yet.
The common thought is that sometimes an air pocket will be trapped in motor cooling jackets and be dislodged by a sudden bump, roll, or angle of the car when driving. If this air pocket is large enough to fill the void of the thermostat temperature spring the water will keep getting hotter and hotter and the air pocket will not transfer enough heat to open thermostat.
By drilling these holes you allow this air to escape without changing the performance of the thermostat.
In Thunderbirds it's not much of an issue because the overflow tank is so far above the intake manifold and radiator. Air bubbles will always find the highest point. In modern cars it's a much more common problem which is why they have bleed valves.

John
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