Flathead 6 Radiator On A 318

[martin53]

Will a flathead 6 radiator work on a Plymouth 318 figured id ask around before i went out and bought a new radiator trying to work with what i have

[Jeff Balazs]

Hey Martin;

I think the answer is yes....and no. The system capacity is probably more than adequate. The original radiator and core was made for a non pressurized system however. I don't know for certain but I would guess the 318 is probably happiest with a #6-#8 cap. So technically speaking an original radiator with the stock core is probably going to give you problems.

 

When I had my radiator re-cored with a modern core the shop tested it and warrantied it up to #12. I put a #10 test on it when I reinstalled it with no problems. Since I still have a flathead 6 I put a non pressurized cap back on it. This works fine for that application......but if I were to re power with something modern I could.

So yes if your radiator shop will warranty their work.

 

Hope this makes sense. Jeff

[Jerry Roberts]

  Your  318 was designed to work best with a pressurized cooling system ( read hotter ) .  The tank on the  honey comb radiator if pressurized will  ' oil can '  and eventually leak along the seam , from what I have read .  Other opinions are welcome .

[martin53]

Thanks guys i found a radiator out of a truck to use on my 318 thanks alot