What Pressure Radiator Cap do I need...

[Metal Twister]

I have just completed a body swap and am running a 77 Blazer 350 /350 combination. I kept the jeep radiator because of the size difference in the body. I want to make sure im using the right pressure cap. What are you guys running pressure wise?

 

[76zimmer]

15# will get you about 240 degrees before blowoff.

 

[Metal Twister]

15# will get you about 240 degrees before blowoff.

Thanks

 

[76zimmer]

that would be best tested with a 50/50 ethylene glycol/H20 mix.

 

[4X4HIGH]

16# is your most common pressure cap that nearly all 70's-90's vehicles used.