Hello! Ive bought a 350z vq35hr 2007 and now i see that i have a problem with the coolant system, the radiator cap bleed due to high pressure in system (1.1bar/15.95psi)
the problem is that the afermarket (arc spressure valve is not opening for colant to drain to the expansion tank. ive heard that the valve should be adjusteable but i dont know how to adjust it.

ive also did an inspection on the valve itself by dissambling it and look for faults but everything worked fine.

i have no manual or documents for the parts either

i have the orginal nissan radiator cap.

and what pressure should the system work at. whats the orginal pressure?




Pressure valve


what should i do?

 

@dkmura
@MicVelo

 

Welcome- two problems here are 1) the aftermarket pressure valve is not one I'm familiar with; and 2) your Z is not a USDM car that we know. Not knowing either of those items means I can't offer any constructive advice. Do you have a local Nissan dealer to consult with? Have you attempted to contact ARC to get instructions?

 

Ive actually did this. ive tested on what pressure this arc valve did open on. and the result was 2.1 bar, so i decided to not use it becouse i do not need to go so high on the pressure in the system. ive re-routed the hoses so the arc-tank works like the original expansion tank. and also ive found the the radior cap was leeking a little due to the stress taken from not being able to bleed correctly becouse of the arc valve. order new one (still waiting)

so actually i think my problem is solved. i just have to go out and drive when my new radiotr cap comes home.

thanks!