Do you have to replace metal gaskits

[RobbieRX-7]

as above, i did the rats nest a while ago, but suspect a faulty check valve so il need to take the uim off again, question is that although i replaced the old paper gaskits with metal ones when i last ripped it all apart, do i need to change the metal ones again, or could i get away with using some blue hylomar.cheers lads!

[nikp]

Strictly speaking you should replace metal gaskets once they\'ve been used, but you can get away with not replacing them.