Oh, plastigauge, I forgot about that stuff, thanks. My first attempt with the plastigauge wasn't a great result. It confirmed that the cap was very convex. I mounted the cap in my mini lathe, clamped on the journal and used the same journal to indicate it in. It took a good .005" to get it flat.
I had measured the length of the small outer gears before and was amazed at how close they all were to each other, within a thou with an old calipers. I kind of dread taking it apart again, as it's kind of a puzzle to get back together.
I plastigauged it again, and the gauge was mostly crushed on the small outer gears, but barely touched on the large inner. But I didn't put any brass shims in around the bolts. So I regauged it again with the .003" brass shims. Then I started to get some readings. With the .003" shim I was getting plastigauge measurements from .002 to .0035. So I would definitely say it's got an interference fit right now.
I mounted the cap in the lathe again to take 3 or 4 off the outer section and leave the center high in an attempt to tighten up the center fit.
After looking at Eaton's site, I found instructions for on-vehicle testing. I interpreted it to mean you should be able to rotate it somewhat freely under light load.
It does turn smoother now with a flat cap, but I think I'll try to see if I can mill those "clearance" pockets back into the cap.
No pics tonight, camera was acting weird.
_________________ "It ain’t what you don’t know that gets you into trouble, it’s what you know for sure that just ain’t so." "Sometimes I sits and thinks, sometimes I just sits." - Satchel Paige
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