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Discussion Starter #1
Who said to drill holes in the thermostat?
How big should the holes be and how many?
I have a 160 degree balanced thermostat.
 

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I may have said it.

Why would you add holes to a 160?

I've done it with a 195 and experimented with a 180. Adding the holes does two things.
1-The holes let air escape during warmup if there is any air.
2-The holes lower the operating temperature of the system.

If you're going to do it, start with two 1/8 holes and evaluate the result.

The warm up will take longer. Realize this too. Your engine performs best at a minimum 180 degrees. 185-195 is optimum.
 

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Discussion Starter #3
I just installed a 4 core radiator and i'm trying to get all the air out of the system. I have one fan on constant and the second comes on at 195 and turns off at 175.
 

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Jlreyna said:
I just installed a 4 core radiator and i'm trying to get all the air out of the system. I have one fan on constant and the second comes on at 195 and turns off at 175.
I would raise the front end up and run it with the radiator cap off if you think air is in there. Once the temp is as high as it will go and the fluid level is stable, you shouild be ok.

It's your business, but I like to run both fans when the sensor says so. I have this fear of premature death to the fan that always runs.
 
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