Flat Gaskets vs. Round Gaskets

[BobHadababyitsaboy]

Is there a certain advantage to either type of rubber case back gasket (flat vs. round)? Would it be improper to replace a flat gasket with a round one instead? It seems to me that flat gaskets are more of a pain to install due to their tendency to twist and tear against the case back. Thoughts? Suggestions?

[jdm]

You should use the type that was originally used. A round gasket can be much thicker and the case back may not sit properly. Vice-versa a flat gasket will not seal because it floats in the groove designed for a round one.

[jdm]

Adding that the common reason why a flat gasket tends to twist is because is too small. Order the correct size (they go in small increments) and it will be fine.