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On 3 Oct 98, at 15:53, Diane & Dave Burden wrote: > I was changing the oil in the '71 Squareback today and as I was putting > everything back together one of the 6 studs used to hold the oil screen and > plate on, stripped out of the case. I would guess this is a fairly common > occurance (at least I *hope* it is...) and I was wondering if we can still > use the car for a bit with just the 5 nuts on, or do we need to get it > fixed ASAP? With one nut missing the plate will leak rather poorly, but probably livable (carry extra oil in the car). If the stud falls out then you have a hole that will empty the case in a couple of minutes, so that is not going to work. This problem seems to occur as a result of several possible causes: 1) Dirt gets in the threads of the cap nuts and this causes the nuts to bind up and turn in the case, eventually wearing out the threads there. 2) Use of cheap aftermarket cap nuts which are not tapped as deeply as they should be. This causes them to bind up too soon and we then force the stud to turn in the case.... I use an M6 x 1 bottoming tap to clean these up and they work lots better. 3) Not using the small copper(?) washers under the cap nuts. This forces the studs to enter the cap nuts farther than intended and they may bind up and turn in the case.... 4) Over torquing the cap nuts. They take very little torque. If you tighten them too much the sump plate will get deformed around each bolt hole and then you will have to tighten even harder...and so on. If your sump plate is deformed, hammer or press it back or buy another one. DON'T try to make it seal by tightening it even more. I have two repairs for this. If I am rebuilding an engine I install hex head bolts from the inside of the case so these will never come loose. If the engine is together, I have a jig that pilots the tap drill and the helicoil tap so that the stud ends up parallel to the others. I suspect that if you try to do this by hand, you are very likely to end up with things VERY screwed up. > As for the fix, I imagine a helicoil would be the answer, but what size do > I ask for? M6 x 1 > Also, please reply to dburden@mindspring.com since I think I've been > un-subscribed from the list for some reason. Probably just one of Greg's new enhancements to take care of undesirable list members that keep bring up other makes of cars! ;-) Jim - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe