Hi all
this weeks question is what pressure rad cap will i need for my expansion tank
im using a brand new 2/0 zetec black top
the expasnsion tank is made from ally and has the normal push down 1/4 turn metal radcap


Thanks
Simon

Mine is a Stant 10334 18psi.

Not too critical, anything 13-20psi ish will work.
a 13psi cap increases the boiling pt of water by about 20 degrees. Bear in mind 50:50 antifreeze does something similar, you really should not be troubled by the coolant boiling up unless there is a real problem elsewhere.

Check the diameter of the cap.

The original neck on my alloy expansion tank used a larger cap than the neck I replaced it with. I think there are only 2 standard sizes, but don't get the wrong one.