I just finished the install on a new Haste radiator. The car is running hot now. there are no leaks that I can see and I've checked all the radiator hoses. Anyone have any suggestions? I'm running a Greddy FMIC, intakes, filters and cat back.

 

did you replace your thermostat when you did your rad? i usually change it everytime i drain the coolant

 

bleed the system, usually whenever you do any work to the coolant system you end up having to bleed it a few times before it works normal again.

I hate doing that cause it takes a long time to do right but it beats having to rebuild due to blown coolant seals!

 

no I didn't change my thermostat. Where would I find the proper bleeding procedure for the engine coolant?

 

Are you running the same mix of water/coolant as before? That will make a much bigger difference than the size of the radiator. Also if you having burped/bled the system extremely thoroughly then what you are experiencing is to be expected. Let the car warm up and then shut it off. Once it has cooled down add more coolant/water. Repeat until coolant level doesnt drop once car is cool.

David

 

What are the temps?

 

http://www.rx7.org/Robinette/flush.htm

 

Many larger-capacity rads need more (or at least the same) as stock air flow to have the same cooling capacity, as a result of different fin design and density. If the radiator is not COMPLETELY sealed around the edges, and ALL areas where air can bypass the rad are not sealed off, it will not cool properly, not even as well as the OE rad.

A related thread: https://www.rx7club.com/3rd-generation-specific-1993-2002-16/radiatorworld-com-radiator-assessment-660256/

 

when you say sealing the radiator off to stop air from bypassing the radiator do you mean on the sides of the radiator? do you have an example of this?

 

One of the things the FMIC guys use is a cover over the front top of the engine bay to make sure air doesn't flow over the radiator instead of through it. Something like on this thread:

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/ebay-carbing-cooling-plate-quality-695585/

 

Yes, on the sides and any other areas where air can bypass. For example, the stock rad has foam along the sides to force all the air thru the rad. Also, if the undertray is not there or sealed to the bottom of the rad, air will bypass.

Dave

 

i hope i dont have that problem .. I am installing a Fluidyne on mine right now.

 

Just wanted to say thanks to everyone for giving me a hand. I was able to solve my problems with your advice. The radiator seems to be working very well now.