Radiator pressure?

[Hrududu]

Hey all, i have a quick question. I have just installed the replacement heater valve in my 280Z and I just need to know how much pressure the little thing is subject to. I have a pressure tester so I can make sure it doesnt leak, but I don't know how high i should pressureize it to. I searched around and saw something like 25lbs in one thread, but Id like a straight up answer if possible. Thanks to you all.

[280~Master]

This is what the FSM says for the 77 280Z

SPECIFICATIONS

Engine ......................................................... L28

Radiator Type .................................................... Corrugated fin and tube

Cap relief pressure kdcm (psi) .............................................. 0.9(13)

Testing pressure kg/cm (psi) ........................ ;... ................. 1.6(23)

Water capacity

(including engine, liter (U.S. qt, Imp. qt) ...........................10.4 (11, 9 1/8) heater and reservoir tank)

[Hrududu]

Well dammit. It starts to leak around 10psi. Looks like i'll have another 2+ years to go without a heater.

[ph240]

25 psi is too much. 280 Master is correct with 13psi. If it leaks at 10, better think about using another one.

[sblake01]

I yours the automaitc valve or the cable operated one?

[Hrududu]

I yours the automaitc valve or the cable operated one?

cable.

[sblake01]

Same as mine. I'll check with my buddy who has a Z shop and see where he got the one that's in my car. I'm not promising anything, that was two years ago.

[sblake01]

25 psi is too much. 280 Master is correct with 13psi. If it leaks at 10, better think about using another one.

280~Master is correct but the testing pressure is 23 psi. 13 psi is the cap relier pressure.

Testing pressure kg/cm (psi) ........................ ;... ................. 1.6(23)