[DCred911SC]

Hi,

Doing my first engine rebuild and have noticed that when using viton o-rings on the case through bolts, the washer on the bolt head side does not fully seat against the case spot face when fully torqued. The o-ring seems to be preventing it from fully seating, and I can get a very thin feeler gauge in between.

Looking at where the o-ring locates in between the washer and the case, there is nowhere for it to compress into other than a small chamfer in the washer, and a slightly larger counterbore in the case, but I don't see how it can be fully compressed into there. I would think that the softer blue o-rings would be pushed into there, but not the harder viton.

Has anyone else noticed this, and is it OK ?

Any advice appreciated

Thanks

David
911SC 1982