Cooling system caps - what pressure rating?

[matttav]

I must be blind.. but I can't find the specification for the swirl tank and expansion tank caps.

Are they both 15 lb??? I didn't think so.. but both mine are 15lb

Cheers Matt

[matttav]

Urmm.... The wierd thing is I thought the bible states that the pressure cap should be on the swirl tank and a lesser pressured cap on the expansion tank. But most people may have them the wrong way around.... my mucho confused!!

Cheers Matt

PS I did find the right 15 lb cap as Halfords for £3.50...I think the Halfords part number is 601.. I saw they also did a 13lb cap the right size as well

[matttav]

OK,

So from what everyone says...it might be worth having a 15lb cap on the swirl tank... and putting any fitting cap on the expansion tank, perhaps drilling a hole through it to make it non pressurised????

would that make sense??

Cheers Matt

[matttav]

Cheers Mark..... Email on its way!!