Just took the rx7 out for a little run and when I stopped, I popped the bonnet and found coolant somehow coming out of the top of the rad cap!?!

I don't mean where it joins the AST etc, I mean out of the actual top?! The label on top was all wet, pealing off etc.

New rad cap required!!

Anyone heard of this before?

 

You had a thread back in October (2008) were you mentioned replacing the cap. Did you replace it at that point?

 

I actually rebuilt the engine since then. Also bought a new cap.

Is it common if the fail to fail in this way?

 

Yes, they do fail. Many people have bought new ones that didn't seal properly in the past. Where did you purchase yours from?

 

from my local car parts store.

 

If it's not OEM that may be the problem. My AST cap failed a couple times since I didn't go with the specified manufacturer and simply replaced it. Might want to look into that.

 

Funnily you said that, I went back to the shop to see about getting another and they don't even have one listed for a Rx7!? They had previously given me a rad cap for some random mazda car. Possibly the same, but hey - I didn't take a replacement.

 

def had problems with radiator caps. Autozone caps are the biggest pieces of junk , DONT EVER buy one for the FD. Guaranteed to leak in like 30 miles. I have bought at least 2 over the years from the and they always immediately fail.

My cap from advanced auto parts lasted at least 1- 2 years before the rubber seal started to just leak slightly....but works a lot better.

 

Wait what cap are you guys talking about? The filler neck cap or the AST cap?

 

Ast

 

I was talking about the filler cap

 

I bought a new one and it failed the first time i put it on.... thank god i was watching the temp gge.

 

I had a failed AST cap happen to me before. I noticed coolant flowing out from the AST either during drives or after shutdown. After i replaced the cap with a stant 13psi, that cured the problem.

I havent heard of a faulty filler cap though, but hey you never know these days.