Are Stihl Flippy Caps Supposed to Squeak and Leak?

[Cantdog]

Leak?..........can't imagine why a flippy cap might fail.....geeze..... the one at the top of the pic is 2 years short of a half century old and it doesn't leak or ever failed me in any way.........

 

[rocketnorton]

"tool less", right from the horses mouth

guess there's never been a leaky screw in cap
or one f'd up by use of tools to remove

 

[belgian]

It must be that the toolless cap has been invented by one member of the Stihl family itself, as no one in the Waiblingen engineering department apparently dares to admit that the flippy cap was an obvious faulty design from the start. These caps have upset almost every user of their product and represent a clear safety issue. But on the other hand, they must like the service revenues generated by the multiple replacements, I guess.

 

[cookies]

the cap o rings are like 7-8 bucks last time I got a couple...about double for the whole cap. If the Oring has a flat face replace it, the problem is the plastic cam and its shaft in the cap wear down so the seal is not fully pushed against the sealing surface or it will leak in the center of the cap past the shaft.