Quote:
Originally Posted by Maximan1
The intermediate plate on my OM617 was off when I got the engine. I'm getting close to finishing up my it's my rebuild, do I need a special tool to center it back up? From what I could see, the bolt holes were not slotted or anything. Seemed like it just bolts up to the block.
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An examination of the back face of the intermediate plate (IP) will reveal a circular recess of about 12 5/8" diameter. There are gaps in the circle in a few places, but it is circular. By mounting a dial indicator to the crankshaft so that the tip of the indicator touches the OD of the circular recess, and rotating the crankshaft, the run-out of the recess relative to the crankshaft can be measured. With the IP bolts slightly loose, it can be tapped into concentricity with the crankshaft, and the bolts then tightened.
Once the IP is centered it will center any transmission that is bolted to it.