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here locally they sell flange head metric bolts I suppose they also would help. ----- Original Message ----- From: "Jim Adney" <jadney@vwtype3.org> To: <type3@vwtype3.org> Sent: Wednesday, August 25, 2004 7:38 PM Subject: [T3] AT pan gasket "fix" > For those of you who have gone thru the trouble of getting a distorted AT > pan > gasket to reseal, I think I have a kind of a fix. > > Well, it's not really a fix, because once the pan is distorted you have a > difficult problem. What I have is a way to keep the pan from distorting in > the > first place. > > The pan is held on by 13 8mm bolts. The pan distorts because the bolts > exert > all their clamping force right around the inner edge of the bolt hole. It > doesn't take much overtightening to bend this lip inwards, so that the pan > is > no longer flat. If you've done this job, you already know that the torque > spec > on these bolts is already quite low: 7 ft-lb. If you try to give these > just a > bit more tightness you'll ruin your pan. > > I've found some very strong Belleville washers which are also called > conical > disk springs and just look like deformed (conical, not wavy) flat washers. > If > you put these under those bolt heads (with the large end of the cone > against > the pan) the bolt force will be spread over a perimeter that is more than > double that of the original setup. This means that we are now less than > half as > likely to bend the pan. I still don't recommend increasing the torque. > > $15 will get a set of 15 (2 spares!) of these special heavy-duty > Belleville > washers delivered to your door. > > I just installed these on my '71 and they fit perfectly. Just remember to > leave > out the original split ring lockwashers when you install these. You can > install > them without removing the pan or disturbing the gasket if you just remove > every > 3rd bolt at a time and reinstall. > > Email me privately if you're interested. > > -- > ******************************* > Jim Adney, jadney@vwtype3.org > Madison, Wisconsin, USA > ******************************* > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ~ Shameless link for search engines: http://listarchive.type3.org ~ > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > >