M20 Autowelt Pistons + .50mm oversized. Who has used this

[digger]

stack feeler gauges

[Motorsport1207]

My pistons showed up today. I didn't order rings because I thought that was a generic part. But it has been more difficult than I thought, and they are more expensive than I thought.

Any advice on how to measure the dimensions of where the rings go? The top two lands(?) are narrower than the pin end of my digital caliper (~2.1MM), so not sure how to measure the depth.
I think I can stack feeler gauges to measure the height.

Do you think the rings would be same as used on a stock BMW piston?

Any recommendations on what rings to get?

Did you purchase the Autowelt pistons


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[Tinkerer007]

The rings from the seller in Russia are $16 a set... I may get those. It appears that they claim to be same part number as BMW rings.

The pistons seem to have slight casting imperfections. I think they will be okay. Will probably need to be cleaned up.




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[Tinkerer007]

I have ordered rings from Russia. It was ~$100 and will take about 3 weeks to get here.

[medgingt]

Does it say where the pistons are made?

[Tinkerer007]

Does it say where the pistons are made?

I don't see any country of origin on the pistons.
The box says:
Autowelt
Autoteile
Germany