212 crank journal size

Unknown

Gotta send my rods to Harkin and trying to determine the size needed. What is the standard DIA of the CRANK rod journals ?---BUD

[Deleted User]

1935-47 connecting rod journal diameter for a 212ci engine:

1.935-1.936. bearing clearance .0003-.0006. Tight!

I would suggest sending the crank to whom ever is going to do the Babbitt. I used Effingham Grinding in Ill. to do mine. They are very familiar with the Hudson splasher engines. The would not do the Babbitt with out the crank due to the close tolerances. They said everybody reads the calipers a little different when it gets this close.

Don't let anybody tell you that these are to tight. Those little engine will run so quite when you get it finished, you won't believe it.

The main bearing clearance is tight also, .0007-.001.

The main journals are as follows:

Front 2.341-2.342

center 2.373-2.374

rear 2.404-2.405

Unknown

Scott wrote:

1935-47 connecting rod journal diameter for a 212ci engine:

1.935-1.936. bearing clearance .0003-.0006. Tight!

I would suggest sending the crank to whom ever is going to do the Babbitt. I used Effingham Grinding in Ill. to do mine. They are very familiar with the Hudson splasher engines. The would not do the Babbitt with out the crank due to the close tolerances. They said everybody reads the calipers a little different when it gets this close.

Don't let anybody tell you that these are to tight. Those little engine will run so quite when you get it finished, you won't believe it.

The main bearing clearance is tight also, .0007-.001.

The main journals are as follows:

Front 2.341-2.342

center 2.373-2.374

rear 2.404-2.405

---

Thanks SCOTT, is that the factory DIA or is that what yours measured , trying to determine if mine are original standard or not and can't find anything in the manual I have . Yes that's right about reading the calipers , and they can be differant also , I allways use the same one when working on something . ---BUD

[Deleted User]

Bud,



Those are out of my Motors Repair Manual, 1950 edition. The Terraplane maintenance manual is a little vague about dimensions and torque settings. When I overhauled my engine this is where I got a lot of my info.

Club members like Geoff Clark and Park W. also helped me out. One other thing you may need is the torque for the head bolts, 45 ft lbs. The manual says to 'Snug them down', and even gives you the pattern to torque by, but no torque value. I imagine torque wrenches were kind of scarce back then.

Rod bolts are 40 ft lbs and main bearings are 75 ft lbs.