Radiator Cap Question H engine

[048642]

I just had the radiator recored for my 1980 H engine HJ45 and in the process the original cap was misplaced. I'm trying to figure out what the original cap pressure setting was for this truck. Any suggestions from the group?:whoops:

 

[RufusTheDufus]

I'll check mine when I get home. I'll also look at the FSM to see what it says. The rad in my 45 is a 4 core, I don't think that's stock. Someone might have changed the cap too I never thought to check it.

 

[048642]

I think I found my own answer, I checked the H Engine repair manual and found that the valve opening pressure is 0.9kg/cm2 or in the US 12.8 psi.

Now i just need to track one down, which I don't think will be too difficult.

 

[bad_religion_au]

my H had a 4 core radiator too, don't think anyone would have bothered upgrading to it, so could be stock.