Expansion Tank Rubber Pad

Hi Bob

Yes indeed it is an artifact from the original 912 engines where it would bounce on the top of the crankcase in some installations.  Depending on how the hoses support it there is always the risk that someone will not check that area and it could be mounted incorrectly and come in contact with the block.  (generally on start and shutdown the engine "shake" can sometimes do it)  The iS is very unlikely due to the repositioning of the tank more forward from the carb versions.  

Cheers

Thank you very much for the validation.  One less item to have to worry about replacing.

They were installed so there wouldn't be any contact between the expansion tank and engine cade. I see many where the rubber loops are broken and the rubber pad slides out if position. I used to replace them, but now I use a good silicone adhesive on the bottom to keep it in place. I clean both surfaces with Lacquer thinner first. I've  never had a pad come lose. I do agree some tanks are up off the engine, but sometimes I see a hose change cause the expansion tank to dip too close to the engine.

Remember two things. Bettersafe than sorry and an ounce of prevention is worth a pound of cure. 

Takes 2 minutes to secure the pad and possibly keep you safe.