R51/3 - Rear Main Bearing Holder

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Wow. What an article! I

Post by Micha »

Wow. What an article!
I really appreciate the time and information.
I will learn what you have written here.
I already know that I will consider replacing this rear bearing with a barrel roller type.
Updates will follow.
Michael Steinmann
R51/3 1952
Engine Nr. 529466

Posts: 22
Joined: Mon Oct 16, 2006 10:04 pm

Barrel bearing

Post by ahistand »

The barrel roller bearing is quite expensive, and may not be worth the cost for the relatively low-stressed R51/3 engine. But that’s up to you to decide. Also, you will need yet another tool, a bearing aligner, to install the crank back into the case. It’s a very simple tool, no moving parts, which can be easily made on a lathe.

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Location: Knox, PA. USA


Post by Daves79x »

Many reputable engine builders don't even use the spherical rear bearing even in the R69-R69S engines it was designed for. A standard front and rear crank bearing is quite fine for an R51/R50.


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