Putting pistons in my 383. Seeing trouble with rod bearing

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Cartel

Cartel

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Its just issue after issue with new parts.
These are clevite P series CB527P. Why is this bearing sticking out?
I got 4 pistons and rods in, now I might be pulling them all out because the bearings are questionable....:(

thanks


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Get two upper shells on one rod? Do these motors even have upper/lower bearing halves? Crush won't make it shift, I know that.
 
I didn't think so either, which is why my first comment was "not installed right?"
If it was mine, I'd take it apart and look, cuz it can't go into service like that.
And
I'm assuming the cap is a match to the rod, and correctly assembled..
 
Yup, take it apart. Do not assume the bearing is correct part number for the box it was in, or even manufactured correctly. Check it. That is definitely not looking right sticking out like that.

On the bright side, you were paying attention and did see it before it caused a bunch of damage.
 
It sorta has to be either the bearing tang is in the wrong place, or the notch in the rod is in the wrong place.

I have seen both.
 
all but 1 of the 4 I put in line up after checking
The bearings are all identical in numbers and markings.


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in this example, the offset is ok. So maybe not the end of the world but still annoying and stressing

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Looking like the bearings are defective. I dunno. I'm regretting this build
 
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File/grind the side of the tang so that the shell is moved over slightly. The tang is just there to aid installation, it does NOT hold the brg shells in place. The crush is what secures the shells.

I have had to grind a LOT of brg tangs that are used on H beam rods because the slots in the rods are narrower than stock rods & the shell will not fully seat without grinding/filing.
 
Prob not your problem, but i assembled a short block with king bearings. Got 4pistons in before I realized that there were upper and lower rod bearing shells. Had to pull the pistons out and correct..
 
It's very easy to displace the upper bearing shell when you tap the piston into the bore. That appears like what happened. That's why I always double check before I get the rod around the crank pin.
 
I can lossen and crack the cap and slide the bearing a bit but it slides right back over when tight.

ok heres the deal. they are supposed to be offset.
look at the step, they beveled that corner the exact same size it sticks out. then look at the corner on the opposite shell. its straight cut.
so that offset is normal or they wouldnt have beveled that corner. I just got off the phone with clevite 77 and theres nothing in the literature he has that says when or why they did that. It just dont make sense like everything else in 2024.

Thats my answer. "its normal" according to how that bearing came from Clevite. They made it that way for a reason.







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I would not being running that. Does that actually stick out past the edge of the rod? It cannot under any circumstance.
Put one of your other bearing pairs that line up correctly into that rod and cap and see if they line up right.
At the least that is a manufacturing defect. If that is the only one you have doing that, replace it.
 
Bobzilla said:
I would not being running that. Does that actually stick out past the edge of the rod? It cannot under any circumstance.
Put one of your other bearing pairs that line up correctly into that rod and cap and see if they line up right.
At the least that is a manufacturing defect. If that is the only one you have doing that, replace it.
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I mean look at the images. they arent out past the face, no but its hard to tell with the pictures where its on the crank.
The other ones I took in post #14 show it more clearly
 
It's not supposed to stick out. It's doing it because of what I said. The rod cap was tightened down with the bearing crooked. It even shows up on the bearing tang in one of your pictures up there^^^^^. Keep tellin yourself it's supposed to be like that and run it. You'll find out real quick. Fix that **** before it costs you your entire engine build. Why anyone would argue against this is nothing short of sheer stupidity. You asked if something's wrong. We're all tellin you yeah. You need to listen and quit bein a blockhead.
 
RustyRatRod said:
It's not supposed to stick out. It's doing it because of what I said. The rod cap was tightened down with the bearing crooked. It even shows up on the bearing tang in one of your pictures up there^^^^^. Keep tellin yourself it's supposed to be like that and run it. You'll find out real quick. Fix that **** before it costs you your entire engine build. Why anyone would argue against this is nothing short of sheer stupidity. You asked if something's wrong. We're all tellin you yeah. You need to listen and quit bein a blockhead.
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why would the buck that corner off then? if they are supposed to be evenly aligned then there would be a triangle shape hole there for nothing.
Its not sticking out past the rod face, but it sticks out past the opposite bearing shell. Sorry for any confusion

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They should match, line up, fit better than that.
The side of the rod that goes up against the crankshaft has a larger clearance and the bearing is offset that way to stay away from the crankshaft. The other side of the rod on a v8 engine "rubs" against the other rod sharing that crankshaft journal and this side has less bearing offset.
No matter what you do, make sure the bearings are not able to contact each other on the rod side and not able to contact the crankshaft on the crankshaft side.

Here is is pictures of rod bearings that sit correctly in a rod. Do as you wish, but I would be checking another bearing set in that rod.
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Thank you for posting. Yes definitely those bearings are on the edge and the corner are sharp and straight. Clevites are obviously not. Maybe to save cost? maybe with the extra oil flow from blocking the squirters it dont need so much surface and they get less issues with protrusion?
I was just worried myself why the offset. I didnt mean to get people worked up.



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Cartel said:
why would the buck that corner off then? if they are supposed to be evenly aligned then there would be a triangle shape hole there for nothing.
Its not sticking out past the rod face, but it sticks out past the opposite bearing shell. Sorry for any confusion

??

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f5ENVis.jpeg


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Ok. Run it. It's your pile of parts. Not mine.
 
Cartel said:
Thank you for posting. Yes definitely those bearings are on the edge and the corner are sharp and straight. Clevites are obviously not. Maybe to save cost? maybe with the extra oil flow from blocking the squirters it dont need so much surface and they get less issues with protrusion?
I was just worried myself why the offset. I didnt mean to get people worked up.



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The pictures I posted are Clevite bearings in a small block Magnum rod, but every single pair of rod bearings I have ever seen line up better than yours.
Nobody is getting worked up, other than trying to make sure you do not have problems. You are seeing it up close and in person. If you decide it's good to go, so be it. I do hope it works out for you, but as I said before, now is the time to check it and be sure before you run it.
 
A steel ruler against the rod cheek will tell if the brg is sticking out. Very simple check. As long as there is some clearance, even just a few thousandths, that is enough. Or you can do what I said in post #11.
 
Some of your pics it looks like the rod cap is offset as well as the bearings. By chance is the rod cap on correctly? Not 180 degrees out? Or are the caps miss matched to the wrong rod? Not pointing fingers or maybe it’s the angle your holding the camera but it sure looks like it to me
 
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