Jump to content


Heat shield above MSA coated header


Recommended Posts

  • 2 weeks later...

On 12/21/2021 at 11:48 PM, Barefootdan said:

My suggestion would be to remove the line that goes from the back of your block to the front and plug both ends. It would mimic the OEM heater core when you’re not running heat in the car. Hopefully improving your cooling issue?

Can you point out what is your suggestion? My thermostat is rated 160 degrees so it should keep the car cool during stop and go traffic situations. 

I took this recent pictures for your reference.




Link to comment
Share on other sites

Have you tried running your Z without a thermostat? They definitely have a purpose but you could try it. Don't get too far from home though in case it over heats on you.

Also you could try putting some kind of reducer in the hose coming off the head. It is possible the pump is pulling the coolant through too fast resulting in those black plugs you've shown us. 

It's a balancing act, not too fast but also not too slow. I still think you could put a thermometer in the radiator while the car is parked, no wind flowing besides the radiator fan and give us a temp reading. No "stuck in traffic" reading. Just sitting still in your garage.


  • Agree 1
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...

Important Information

By using this site, you agree to our Privacy Policy and Guidelines. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.