Thread: DISA 0 Ring
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  #37  
Old 02-25-2011, 09:18 PM
pleiades pleiades is offline
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Location: Oregon
 
Join Date: Jun 2010
Posts: 2,222
Mein Auto: '99 528i, M52TU w/stick
As noted in an earlier post, my new DISA O-ring is 50 mm I.D. and 3.2 mm thick.

I replaced the old one a couple days ago and it measures exactly the same.

I noticed when removing and re-installing the DISA unit, there was resistance both ways, presumably because the O-ring is meant to be a tight fit.

Those red ones look quite thin. Be sure to measure your old O-ring once you get it out.

My old one still seems usable by the way; not hardened or cracked/shrunken at all.
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