Old ones felt pretty much like the new ones. The exhaust side one had a little front/back play - no doubt a result of me using the puller and taping on it to get it free.

I don’t think I had to touch them. Had I not pulled off the intermediate sprocket - I probably would have let them be. But I did and so I decided to go deeper.

Pics below compare new and old.:
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IMG_1144.jpg
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For shi$&s and giggles - I decided to pull them apart to see what all the fuss is about:
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Much simpler than I imagined. I was unable to get the intake side balance shaft apart. It was much tighter. I’m sure it has a similar construction.

They look like they could be rebuilt with a press - or maybe even just heat up the gear and put it on. You would just need to know the proper outer dimension to get it right. I wonder if it is possible to buy only the gear?

Seeing it apart - I now see why oil pressure and flow is sooooo important in these engines.

I need to find an oil diagram to see where these feed from - and what would need to be blocked for them to starve to the point of seizing.

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New and old plastic covers are identical. The old one was not super brittle as I had expected. It was just a little bit stiffer than the new one. Same part number - no updated revision number. All other parts of the balance shaft assembly components had updated letters at the end of their part numbers.

Finally, put in an order for the last parts I should need!
2x freeze plugs and 8x cam adjuster seals. The old ones are stiff and definitely need to be replaced! Remember - I’m at 120k!
Besides oil and coolant - I really hope I do not come across anything else I need to order! I’m in waaaaayyyyyy deeper than I intended.
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