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  #1  
Old 05-12-2018, 01:36 PM
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rang-a-stang rang-a-stang is offline
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Rod, main, and Cam bearing recommendations or advice?

just dropped my 401 stuff off at the Machinist. I need to order Rod, Main, and Cam bearings.

I see OEM was Clevite 77s. Anyone have any advice on bearings before I order them? Stay away from certain brands, positive experience with others? This machinst basically said, any name brand is good but they typically use Clevite or King...
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Last edited by rang-a-stang : 06-06-2018 at 03:57 PM.
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  #2  
Old 05-12-2018, 02:27 PM
joe joe is offline
 
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I haven't rebuilt a motor in many years so can't attest to quality in 2018 but I've used Clevite in the past and never had premature bearing failure.
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  #3  
Old 05-12-2018, 02:43 PM
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King is fine, I opted for Clevite tri metal P series for lt1 rebuild.
Made in USA according to boxes.
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  #4  
Old 05-12-2018, 03:49 PM
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I have king bearings in 2 of my 360's.
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  #5  
Old 05-12-2018, 07:09 PM
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rang-a-stang rang-a-stang is offline
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ok, copy all. thanks guys.

Looks like cam and main bearings are the same in 360/401 but rod bearings differ. (going off part numbers are rockauto)
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  #6  
Old 05-13-2018, 11:25 AM
Ristow Ristow is offline
 
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OEM was federal mogul,which is junk. if you had clevite they were changed.

i prefer clevite,and also like acl. acl makes an oversize thrust bearing. acl are also full groove mains tho,which means the rods are oiled 360 degrees,which is fine altho not necessary,and will lower oil pressure.

clevite,and the oem were half groove mains. i would run half groove mains given the choice.
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  #7  
Old 05-14-2018, 07:25 PM
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Heavy_Metal_Thunder_81 Heavy_Metal_Thunder_81 is offline
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Quote:
Originally Posted by Ristow
OEM was federal mogul,which is junk. if you had clevite they were changed.

Are these not OEM?

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Last edited by Heavy_Metal_Thunder_81 : 05-15-2018 at 07:09 AM.
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  #8  
Old 05-14-2018, 08:03 PM
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Yes. They have the "AM" logo on them.
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  #9  
Old 05-15-2018, 12:15 PM
Ristow Ristow is offline
 
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Wow, I've tore a lot of these engines apart and never seen am stamped clevites. Always federal mogul.
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  #10  
Old 05-23-2018, 12:32 AM
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mattmopar440 mattmopar440 is offline
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Quote:
Originally Posted by Heavy_Metal_Thunder_81
Are these not OEM?


are those out of that 401
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Inferior Chevy


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  #11  
Old 05-23-2018, 10:48 AM
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rang-a-stang rang-a-stang is offline
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Quote:
Originally Posted by mattmopar440
are those out of that 401
Yes sir.
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  #12  
Old 06-06-2018, 03:44 PM
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3 3

Motor was made March of 1973 . Clevite 77 is what I use in all my engine builds
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  #13  
Old 06-06-2018, 03:55 PM
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rang-a-stang rang-a-stang is offline
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My motor was built then?!?! That's what those numbers mean?!?! SWEET!!! I have the early stud mount rockers (casting numbers are 3216090-1) but my block casting number was 71-78.

I would assume that means the bearings were made March of 73 or does it mean they were installed in March of 73?

I ordered all Clevite 77 bearings for my rebuild because they seem to have good ratings all over the place, were OEM, and have been around for decades.
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  #14  
Old 06-06-2018, 04:17 PM
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11 9

My motor bearings have 11 9 .The jeep is a 1990 .vin date nov. 1989 . So vin date and motor date are the same.
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  #15  
Old 06-06-2018, 04:23 PM
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Manufacturers date .Is your jeep a 1973
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  #16  
Old 06-06-2018, 05:20 PM
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Nope. I have a 79 but the engine was swapped in before I bought it so I have no idea/history on the engine.
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  #17  
Old 07-31-2018, 11:43 PM
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A tri metal copper-lead with Babbitt overlay bearing like the OE bearings and Clevite 77 are the heaviest duty bearing. They can handle high loads without failure. However, they wear out quickly. Most have blown through the Babbitt layer by 100,000 miles and after that their performance degrades significantly.

Bi-metal aluminum bearings like King are a medium duty bearing that cannot handle loads as heavy as a tri-metal bearing, but have a longer service life. 200,000 miles from an aluminum bearing is completely do-able. They are more tolerant of crankshaft finish and misalignments too and wear the crankshaft journals less. Modern bi-metal aluminum bearings have nearly the load capacity of the older tri-metal bearings.

The AMC V8s used in standard AMC passenger cars and not Jeeps actually switched to bi-metal aluminum bearings sometime in the mid to late 1970's. The Jeeps kept tri-metal copper-lead bearings because of their anticipated loads and because bi-metal aluminum bearing technology was not what it is today.

I recomend King bi-metal aluminum bearings for stock to mild engines because of their service life in those conditions. High performance builds should still use a tri-metal bearing.
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