Powervalve issue

[shank]

The bellows on my powervalves are coming off the top round cap from time to time. They normally held on with a circular spring to the cap. I have been trying cable ties out now as they are stronger then a spring but it happened again.

Possible reasons anyone ?

 

[Harbor]

Get new bellows and springs, rebuild kit

 

[ngerk]

I had the same issue when I assembled my TPE engine this year. Everything was brand new and the bellow on one powervalve popped off twice first ride out. I took it apart, cleaned everything good, and put a thin layer of threebond on it. It hasn’t popped off again.