51Meadowbrook

1951 230 Flathead 6 rebuild

59 posts in this topic

1 hour ago, dpollo said:

I would be concerned that a connecting rod bearing is available  -.040 for this engine.       

That is exactly why I suggest he have the machine shop source the bearings.

dpollo likes this

Share this post


Link to post
Share on other sites
7 hours ago, dpollo said:

I would be concerned that a connecting rod bearing is available  -.040 for this engine.       

I was thinking the same thing when I read the measurements but I checked Andy Bernbaums (oldmoparts.com) and they list up to 0.030 for mains and 0.040 for the rods.

I read into that they are available in general up to 0.040 for the rod ends.

I did Not do any further checking however.

DJ

Share this post


Link to post
Share on other sites

ID: 53   Posted (edited) · Report post

On ‎6‎/‎2‎/‎2017 at 3:52 PM, DJ194950 said:

I was thinking the same thing when I read the measurements but I checked Andy Bernbaums (oldmoparts.com) and they list up to 0.030 for mains and 0.040 for the rods.

I read into that they are available in general up to 0.040 for the rod ends.

I did Not do any further checking however.

DJ

Do you have a micrometer or set of calipers available to you? A quick check would answer your question. But I would have to agree with Don the machine shop would know best and should be able to order the correct ones at a reasonable price.

Edited by Silverdome
missed a word

Share this post


Link to post
Share on other sites

My motor's previous incarnation had .050" under rod journals. These very very tuff to find at the time, apparently.

well, that crank did not last long, but there were other issues that were the culprit... Bell mouthed honing job on the rods and improper radii at the sides of the journals. When the crank was magged after disassembly, it was found to be cracked in several places.

but yeah, have the machine shop get all the bearings...

BigDaddyO and thebeebe5 like this

Share this post


Link to post
Share on other sites
On 5/31/2017 at 4:45 PM, Merle Coggins said:

Flathead engines don't use push rods. Push rods are used on overhead valve engines. They go between the cam tappets and the rocker arms to push the valves open. Connecting rods connect the crankshaft to the pistons.

Exactly...  This is why I scratched my head on the pushrod bearing reference.  I was questioning the meaning and wanted to know what exactly he meant by it.   The term "pushrod bearing" did not originate from me, just in case some  folks have misread something here....

Share this post


Link to post
Share on other sites

I call 'em connecting rod, big end bearings. Of course at opposite end of the small end bearing. Aka piston pin bearing. 

classiccarjack likes this

Share this post


Link to post
Share on other sites
On 6/16/2017 at 9:03 PM, keithb7 said:

I call 'em connecting rod, big end bearings. Of course at opposite end of the small end bearing. Aka piston pin bearing. 

Due to occasional 18+ hour work days, I can totally relate to this.  Especially when your totally exhausted and can't find the right words!  LOL

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now