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The Oil Soup

Main bearing question

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I am in the process of rebuilding a '55 230, when installing the forward (#1) main bearing halves noticed that the oil groove in the two halves does not match up, in other words they are off set from one another. It seems that the lower half should be a mirror image of the upper half but I have two upper halves. The main cap only fits correctly one way. Any help? Thanks

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I Just looked at a new set of Clevite mains for a 230.  Only the thrust bearing is grooved top and bottom.  The other three are only grooved on the top half.

 

The old set, still in the block are the same.  Methinks you have your top and bottom halves mismatched.

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Just saw this..

The OE MoPar and all NOSR main bearings have matching grooves top and bottom.

The modern offshore replacements only have one shell with a groove...

Check out 415M Federal Mogul on Ebay to see pics of how original bearings were manufactured.

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Yep the mains need only one shell with the oil hole..The upper shell oil hole matches the block oil hole.

Both upper and lower bearings should have a groove top and bottom for good lubrication.

Rear main is a one way assembly installation.

 

s-l400.jpg

Edited by Dodgeb4ya

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