Groves in rear main bearing cap

F

figment

Senior Member
I have a rear main oil leak. My bearing does not have any oil grove or groves . I noticed that in other posts there are several different ways to grove the bearing surface. Is it necessary to have the grove? I also noticed some have a hole in the bottom of the bearing. Is the hole necessary? Is there a good way to put a grove in this late in the game? Anyone have a good photo of the correct way? Thanks for your input. Norm
 
figment said:
I have a rear main oil leak. My bearing does not have any oil grove or groves . I noticed that in other posts there are several different ways to grove the bearing surface. Is it necessary to have the grove? I also noticed some have a hole in the bottom of the bearing. Is the hole necessary? Is there a good way to put a grove in this late in the game? Anyone have a good photo of the correct way? Thanks for your input. Norm
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YES. The groove is to spread oil across the bearing. The hole is an old "farmer fix" that is not necessary if the grooves and wells are present and the bearing is clearanced correctly. If the groove is not in the cap, I would venture a guess that the block does not have them either so, cutting the groove and wells in the cap will be pointless without doing the block also. Here is a picture of a cap that is grooved correctly with the wells.
 

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I sure wish mine looked like that. I need to figure out how to post photos. I just haven't talked the time to follow the steps. Thanks for the photos!
 
Bill is close to me (relatively, at four hours), and can turn a babbitt job in a day if you give him warning. Top notch guy.
 
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