Aircooled Mechanical TechA Q & A Forum devoted to Aircooled Mechanical Issues. Got a problem? Then ask in here. Please, no 'For Sale' or 'Want To Buy' ads, plugs for your 'business', links to 'for sale' ads or Ebay links to your (or your mate's) auction (use the VZi 'Classifieds' section) - this also includes thinly veiled 'What's My Car Worth?' threads and "Who Can Sell Me A . . ." posts.
Can’t help you with which ones to use but just in case you’ve not fitted them before, oil the rings first and work the tube up and down a few times on a table or something similar to get them seated correctly... they’ll leak for sure if not...
Yes, there are 2 grooves but there and 4 o-rings supplied. 1 groove to 1 o-ring, so there's always going to be 2 o-rings that are surplus to requirements. The question has always been, which 2 o-rings to use...but now we know
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