Originally Posted by PhatRV
If you have a new IO-360-M1B engine and want to use it for FP then I recommend you get the Lycoming factory guidance for the conversion.
These are the instructions from the factory tech rep:
" Iíve got a couple illustrations Iíve attached to this email to show the process for pulling off the rear prop governor drive assembly and installing a block-off plate. You would remove the four gray-painted nuts (one of them is circled in green), and pull the drive assembly straight out. Cover plate p/n 69106 and gasket p/n 69551 would get installed over the hole and secured using the plain washers and nuts you removed, replacing the 4 used lock washers with new lockwashers p/n STD-475. The nuts will get torqued to 17 ft-lbs.
On the front of the engine, you can either put an AN cap on the elbow (something like an AN929-6), or remove the elbow and put an STD-783 allen plug into the case, using a little bit of Loctite 564 on the first 3 threads.
" (The elbow remains after the oil line is removed)
The drawing shows the picture of the block off plate that is installed after the governor is pulled out. This also necessitate removing the oil line which is quite easy to do.
This is the link to my post showing the the block off plate after it is installed.
I donít mean to give you a hard time. My only reason for posting was that I did not want others to take your advice and end up with a major unexpected oil leak, particularly in flight. There is a reason that Vanís instructions and the Lycoming service instructions exist. To prevent the front plug from being pushed out by oil pressure.
Did your factory tech rep tell you why you should ignore Vans and Lycomingís instruction?
Is there something different with the IO-360-M1B that allows not removing or poking the back plug?
At minimum the factory rep should tell you why pressure will not build up and push out the front plug. There may be a very good reason but you have not shared what that is. (I hope you are correct)
For what itís worth I poked the hole on my O-320-D1A and now have over 700 hours on it. If I had to do it again I would have left the oil line in place as PilotjohnS describes.