Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 04-05-2018, 12:54 PM   #1
EZDriver
Junior Member
 
EZDriver's Avatar
 
Join Date: Jan 2016
Location: Holly Lake Ranch, Texas
Posts: 4
Smile Main and Rod bearing oil groves

Hello One and All,

Haven't posted for a while.

I have been concerned about the fact that I think my center main in my 1929 Special Coupe might have too much tolerance and is knocking. Have removed the center main cap and found the oil groove to be what I think is too small. Can anyone give me the dimensions for the grooves that are cut in the bearing surface how deep and how wide they should be. The engine was overhauled back in the 60s and has been driven very little ever sense. I want to drive in more from now on I am not sure how much I should refurbish. Any help would be greatly appreciated.

EZDriver

Last edited by EZDriver; 04-05-2018 at 12:55 PM. Reason: grammer
EZDriver is offline   Reply With Quote
Old 04-05-2018, 04:51 PM   #2
Jim Brierley
Senior Member
 
Join Date: Jun 2010
Location: Temecula, CA
Posts: 2,692
Default Re: Main and Rod bearing oil groves

Size of the grooves makes little difference as long as they are in there. Normal width and depth are about 1/8". Some are machined into the babbitt after it is poured and machined to size, some are cast in as the babbitt metal is poured into place. The grooves should not continue to the end of the babbitt as oil needs to stay in the bearing. not run right back into the pan.
Jim Brierley is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 04-05-2018, 06:42 PM   #3
Mark in MT
Senior Member
 
Join Date: May 2010
Location: Western MT
Posts: 193
Default Re: Main and Rod bearing oil groves

According to the ford prints, the grooves are 3/32 to 7/64 wide, sides forming a 90 degree included angle, with a 1/32 radius in the bottom. The rod print calls out the depth to be 1/32". Like Jim says, it ain't magic, the oil will find its way.
__________________
Mark in MT

Always looking for another opportunity to be wrong.
Mark in MT is offline   Reply With Quote
Old 04-05-2018, 07:05 PM   #4
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,263
Default Re: Main and Rod bearing oil groves

It might look too small because the babbit is worn away. First thing to do is check the clearance and adjust as needed.
Tom Wesenberg is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 02:58 AM.