O-Ring Size Question Triple Carbs / Manifold

Gerald

Gerald

Hero member
Does anyone have the correct size / nomenclature of the 6 o-rings for carbs and manifold plates?
R27 and R28 are a tad to thick.

Gerald
 
Take care it's easy to snap an ear off, guess how I know. I went vitron and too thick, not good the thick bit. Me and the O ring
 
Sorry to hear about that Vince, bummer if you're in the middle of a refurb and one manifold breaks.
Guess a 3D printer and the right plastics could save the day.
My concern is to seal the caboodle without any leaks.
 
Also check that the sealing surface is still flat. We had several here that were bent, most probably by to thick O-rings I assume... Soft material, that suckers...
 
Gerald,

When fitting new o-rings, you should consider replacing the insulating plates as well. As Lothar has stated, many stubs are bowed, mostly from over-tightening. The stock insulating plates compress under excessive stud torque, bowing the inlet stubs considerably. Thicker than stock o-rings make matters even worse. I skim the stubs on just about every engine that I rebuild. Just a very slight skim allows the stock o-rings to be used.

The M7 nuts don't need 25Nm, they'll be just fine with 12.

piet
 
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