hey so i plan on replacing my plastic oem replacement radiator with a blitz aluminum radiator and the cap is going to be 1.3 bar,
my car is stock and on the 1.1 oem radiator cap, is it oossible that heater core can blow or leak if i stall this radiator since pressure will increase? Had the same set up on my 1st evo and it didnt have any problems.

 

Nope you'll be fine. Have run those 1.3 caps on OEM and non OEM radiators for years with no cooling issues

 

It'll be fine, the heater core is all metal (no plastic tanks). I have a 2bar cap on my car.

 

whut. who makes those? I thought water pump seal is the weak point

 

i can still run the stock cap on the blitz radiator? ive seen guys with koyo radiators and run the stock cap with no problems?

 

In this case, I think nothing terrible will happen, that is, there will be no explosion. Aluminum is stronger than plastic. On my 2011 Chevrolet Silverado, I replaced the radiator with a 34 '' Core Radiator DWVO. I ordered the best silverado radiator upgrade here https://boostyourengine.com/silverado-radiator-upgrade/ It was back in 2018, but there are practically no traces of use. There are no signs of pressure either.