Pics that OEM honda cap works

And neither of you commented on when these radiators were bought... i've had mine a good 6 months and have had no problems with it.

As i said i am not someone to complain to, merely a worker (and an apprentice at that), i'm just trying o solve the original problem that OP posted.
I will raise the issue at work that people have had problems with the stant caps

is this the said cap that is failing??
http://www.stant.com/brochure.cfm?br...ocation_id=179

As i said mine didnt fit under the bonnet (fouled on it) so i took it off, but pressure release is a "luxury" imo,, and unnecessary. Spoon ect all make usual rad caps