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Mine were a little tight coming off - if they were extremely tight, maybe the tube is slightly out of round? My new ones were also a little loose, so it couldn't have been the tubes.
These fittings can be a little tricky to install - the part that holds the tube and fittings down is barbed and needs to go down ALL THE WAY so that the tube seats correctly on the "U" on top of the cam bearings. There should be no or _extremely_ little room between the plastic tube part and the sides of the "U". I've done this twice and it takes more than (my) hand pressure to do this - it took some taps with a rubber mallet. Obviously, don't go overboard with the mallet or you will wind up with broken fittings and/or out of round tubes.
Apparently, my 380SL's tube fittings weren't down all the way before I got the car, one of the tubes just lifted right off of the bearings. This caused a cam to be eaten along with most of the cam followers. Definitely check that they are down all the way before buttoning up the engine.
Also be aware that these are "one time use" - once installed and removed, the plastic barbs will wear/distort, they will not be as strong as they were in holding the tube down and they must NEVER be reinstalled.
Last edited by Strife; 07-04-2007 at 12:41 AM.
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