Thrust Washers

[Bruce of MN]

Per

https://www.brattons.com/THRUST-WASHER-FOR-A-INSERT-MAIN-BEARINGS/productinfo/8946/

three are needed. I only see two in my engine. Two are at the rear main bearing, but that's it.

 

[Hitman]

You can get by with only two. Three are commonly used, two on the flywheel side of the rear main (one of the cap, one on the block), creating a complete circle. One is used on the cap, on the front side of the rear main cap.

 

[Bruce of MN]

It has run great for 15 years or so with two, so it must be right. Thanks to all for the tips.

 

[Flathead]

Proper use of the clutch pedal really helps the thrust bearings.

 

[Bruce of MN]

Mine don't seem to have wear, maybe I use the clutch okay?

 

[Flathead]

I'm sure you do!