Expansion cap pressure

[clive f]

I`m soon to be dropping the ajp into my griff, and I`m thinking ahead for the design /routing of the coolant system, I plan to have a radiator/expansion cap at rthe highest point of the system but would like to know what pressure the cap should take, something like 15psi?

anyone have any info on this please.

[ridds]

Should be a blow off pressure a touch of 30 odd PSI.

Most cooling systems run at 1 Bar so a safe margin over this is required. Not sure on specifics of the AJP though.

[JensenA]

The cap is from a VW Golf (MkII ?) so the pressure in the AJP won't be anything out of the ordinary.

[clive f]

I`m looking at a radiator style cap rather than the standard, I`ve seen several on ebay around 1bar, just wondered if one of these will do the job.?

[GreenV8S]

1 bar (roughly 15 psi) is typical and I'd be very surprised to see it more than a couple of psi either side of that.

[clive f]

thanks Peter, is there anything you don`t know?