Saw building 101?

[Yukon Stihl]

I used to use white cotton thread to help seal snowmachine engine crankcases.
Put the sealer on and lay a single thread in the center of the case flange

 

[EFSM]

I used to use white cotton thread to help seal snowmachine engine crankcases.
Put the sealer on and lay a single thread in the center of the case flange

I think that is standard practice with Lycoming aircraft engines. Thread and sealant.

 

[jacktheripper]

I think that is standard practice with Lycoming aircraft engines. Thread and sealant.

Old Porsche engines too

 

[davidwyby]

Threads by @Onan18