i just bought the 5'16 isothermal spacer today. I'm planning on doing the install this weekend or next. What benefits is it to do the coolant control valve install also? I live in Indiana also where it's cold.

If I do install it, it says to keep it closed when temps are above 55 degree Fahrenheit, which is about 12 degrees Celsius. If I only drive my car in the spring/summer/fall where temps are above 12 degrees, can I keep the valve closed at all times? How could that hurt my engine, if any at all?

Thanks for the help.

 

You have a coolant system in there now. The valve just lets you shut it off when it's warm so you don't get so much heat soak. The only thing that can happen if you leave it off in cold weather is the butterfly might freeze open or shut. The pressure drop across the throttle body, creates a pressure drop and a temperature drop as well. It can freeze in cold wet weather.

 

would i lose a lot of power if i don't install the control valve? Basically, the pressure and temp will be close to stock across the whole system right?

 

I doubt you would lose more than a couple oh ponies....