Jerry and I have a totally messed up case caused by a seized main bearing, #4 to be exact. There is a service bulletin on the Great Plains website that addresses this issue. I am repeating it here because I am sure that there are others out there waiting to do the same and if you apply this corrective action, you may not have to face this issue. Here is the direct link to the bulletin from the GPASC site.
http://www.greatplainsas.com/service1.html The instructions are very clear, with pictures. Here is a snip from that page. This Service Bulletin applies to all Type 1 new engine cases manufactured since 1998. These cases may been purchased from any company - aircraft or automotive related. The plug pressed into the case that plugs the drilling to the Number 4 main bearing and Number 3 main bearing (pulley end of the crankshaft), may be pressed into the case too far and may block oil flow to the #4 main bearing. In over 50% of the cases we have checked, the plug is either blocked or has partially blocked the flow of oil to the Number 4 main bearing. Jerry and I have chosen to replace the case, rather than trying to have it repaired. The main bearing is frozen to the hub and will be cut off and the crank will be polished. Right now, we think this is the sum of the damage and that the damage was caused by the plug. See N64KR at http://KRBuilder.org - Then click on the pics See you in Mt. Vernon - 2006 - KR Gathering There is a time for building and a time for FLYING and the time for building is OVER. Daniel R. Heath - Lexington, SC
