Clevite rod bearing ?s

[miller]

Have a set of Clevite 77 rod bearings, CB-527 P-20. Mounting them into my rods, noticed something, so need to ask. Maybe there's something going on that's new to me.

There's no difference between upper and lower shells. Of course, all have the locking tab. What has me thrown, is on the opposite sides from the tabbed side...there is no oiling hole. Mean the hole in the bearing mating surface, for the cylinder oiling groove cut into the rod cap surface, opposite the tabbed side.

What gives? Is this something new...or wrong.

Looked up the bearings, and that side is plain on both halves.

 

[WP29440SE]

i had the same question, the squirt holes are deleted on the clevite bearings. I used them and all is well. if you want you can take a round file and make them yourself. was told they are not necessary. they are there to shoot oil up into the cylinders.

 

[Cranky]

There's enough oil coming off the crank to lube the cylinders but it's mostly about keeping the underside of the pistons cooler.....I thought. Might be something that needs more research on.?

 

[miller]

There's enough oil coming off the crank to lube the cylinders but it's mostly about keeping the underside of the pistons cooler.....I thought. Might be something that needs more research on.?

Off the crank, sporting a windage tray? Just thinking out loud.

Also thinking back on my radial engine days. Example is...single-row nine cylinders (R-1820)...and the only way most of those cylinders got oiled is from a spray valve (lol, squirter) located on the crank.

Sorry, guys, guess it's the old man in me. Just trying to see how any cylinders, pistons, rings, would get any oil, without those squirters. Doing a bit of checking on it, seems some cut their own. Only needed on the rod cap bearing.
One thing for sure...not going together, until I feel good about it.

 

[sleepar]

With all the moving parts spinning with oil returning to the sump from the valve train...oil would splash everywhere.... I smoothed out the casting flashes so everything flows smoothly around the block here and there as needed.... your over thinking it.

 

[miller]

Don't matter. Cut my lower rod bearings for the port.
That little deal has been working...for how many years?? Positive amount of oil to the cylinder walls...I'll live with it.

 

[Garys1969RR]

I noticed mine didn't have them when I put my 451 together. It has been running fine for 3 years now. There IS a lot of oil spray coming off the rod bearings as they are spinning around. So I am sure there is plenty of oil thrown onto the cyl walls as the engine runs. But do whatever you are most comfortable with. Good luck Miller!

 

[nm9stheham]

If you worked on radial A/C engines, I would go with your judgement!

 

[miller]

Appreciate all that, guys! Yeah, overhauled radials for just under 20 years. WW2 stuff. Power deck was my work.

Hehe. Gotta admit...don't think much on what 'engineers' have to say...just toss a handful of common sense at things. Just too many new things going on nowadays. Any rate, know for a fact engine parts and pieces need oil. The hell with new and improved.