Just got my crank back from the machine shop and he sold me bearings to go with it. The OEM bearing had a hole on one side for the connection rod, the Clevite CB481P does not. Do I have to file a hole in the new bearings?
Connecting rod bearing
- Thread starter DartFred
- Start date
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RAMM
Well-Known Member
You don't say what crank your using, however it should not matter. The hole in the bearing was for a corresponding hole in the connecting rod itself. Long story short---The 481p bearings are correct. You are good to go, your crank shop would be the ones to call for any questions. J.Rob
moper
Well-Known Member
Nope. That hole is for oiling the cylinder walls. But as technology moved forward, the engineers realized that can put too much oil on the walls and there's already a ton splashing around in there. So they stopped making that passage. You don't need it. I'd go as far as to say you don't want it, either.
You don't need the hole . The oil comes to the bearing via the crank.
I know the oil will get to the bearing from the crank, I mean the small hole on the side of the connecting rod. My engine is a 97 magnum, is it new that they removed that hole to splash oil on the cylinder walls?
Most aftermarket con rods don't have the oil"groove" as stated earlyer not nessesary to oil piston bores. now some do have a hole thru the rod to the small end to oil read that as cool the underside of the piston.
green1
Well-Known Member
This just hit my dumb butt. How can you have splash, with a windage tray, or a screen?
I guess you get oil from rod side clearance...
moper
Well-Known Member
A windage tray stops the air whipped up by the crank, from pulling oil from the sump, into the airstream around the crank.
The bearings are oiled, then the oil flies off the rotating assembly. Up on the cam (that's how the lifter faces are oiled), up on the bores, out onto the block walls...
A scraper fits close to the rotating assembly and "scrapes" the oil out of the airstream around the turning crank. At high rpm, most of the oil in the sump is carried around with the crank.
The bearings are oiled, then the oil flies off the rotating assembly. Up on the cam (that's how the lifter faces are oiled), up on the bores, out onto the block walls...
A scraper fits close to the rotating assembly and "scrapes" the oil out of the airstream around the turning crank. At high rpm, most of the oil in the sump is carried around with the crank.
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