Owner reviews for radiator cap

Honda Radiator Cap 19045-PAA-A01. Accept no substitutions. Those aftermarket-OEM (Murray or whatever from O'Reilly's and Autozone) are JUNK. I've had several. I'm now on my second HONDA one, not due to design flaw but due to driving my car with a breeched head gasket for 3 years. The parts house ones NEVER lasted nearly as long (only about ten stops or so for me).

I had a Motorad radiator cap until about a week ago. Worked fine just changed it for a spiffy Flex a Lite cap.

Check the radiator cap. I had this same issue (though no overheating, perhaps because I was driving in sub-freezing temperatures) and after replacing the radiator cap with a $12 part, no issues since.

Replaced the rad cap with a brand new one for a Hyundai and that fixed that

I also got the best radiator cap I could find which was the Porsche Cayman one( 996 106 447 04 which is like 6 revisions from the original vw one) which is a way better design and much better fit than the MK1 rabbit one I had but seemed to work just fine.

I had a mishimoto rad cap that completely screwed up my coolant system.