Engine – Day 9

So today I was back to work determining what direction I would finally end up going with the end play situation.

Given all of the input I’ve received from people I trust, as well as other random comments on similar situations I’ve read, I decided to move forward and go with 4 shims.

I remeasured today and am moving ahead with the following specifications that should work:

Thrust Surface to Flywheel Gap: 1.28mm (.57″)
Gap Goal: .10mm (.004″)
Shim Pack: 1.18mm (.566″)

Now I already know I can’t get there with 3 shims as the max with .38mm shims would be 1.14mm which would leave .04mm to deal with.

However, if I go 4 shims I can go 2 x .30mm, 1 x .34mm, and 1 x .24mm to get me the exact 1.18mm I’m aiming for.

Now is that .04mm difference between them a possible problem?

Acceptable endplay would be 0.09mm to 0.12mm. Going with the 4 shims gets me exactly to .10mm which is the ideal.

Now Marc indicated he thinks the Silverline bearings may even have more but I’m going to stick with what gets me the .10mm.

I mentioned this to him and he gave me a thumbs up so I’m feeling confident this will all work.

I was set to go buy  some .30mm ones and some .24mm and thankfully I stopped and started searching again and I found all of the extra shims I bought last year with the 2019 New Build and I had everything I needed. I must haved picked the bag up and moved them previously because it was right where it should have been.

Anyway. I’m moving forward with the build now and once everything is assembled, I’ll recheck all of this at the very end through either my dial gauged or my little end play tool.