Flipping pistons?.....Phphfsssssssssssssst....Now it's oiling backs of bearings

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67Dart273

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So NOW the "controversy" is whether you should oil the backside of rod/ main bearing shells


 
I had a knucklehead tell me he crazy glued them back in the day...I told him" the oil and heat will break the glue down in short order...:)
 
I had a knucklehead tell me he crazy glued them back in the day...I told him" the oil and heat will break the glue down in short order...:)
That’s is really dumb, they will move (And need to move) when torquing The cap
 
Maybe because some B20 blocks are aluminum and I'm not sure if his is. I've never built an aluminum blocked engine but I have experienced the gall that can happen with aluminum and stainless steel. So which would be harder, an aluminum block or the bearing shell? I've always set the bearing so they are not proud at all and never had a spun bearing in a Iron block or rods.
 
Some people try to reinvent the wheel with the stupidest things ever.
 
Its just weirdo wankery. Some farmer does something goofy and calls it voodoo magic...the kiddies are amazed.
Noting against farmers though...:)
 
Bad move. The brg shell has to remove heat from the oil at the journal interface; that heat in the brg shell transfers the heat to the rod. Oil has very poor heat conductivity, about 1/4 of what water has. So having oil on the back of the brg will reduce heat transfer.
 
People come up with some f*ckin dumb ideas....

My brother an I worked at a 10 minute oil change when we were young... A guy came in and asked my brother to grease his front brake pads because they were squealing.... :wtf:
 
Every engine I have dismantled the back sides of the bearings have been "wet" with oil so "some" gets in there anyway. I have always dunked the bearing shell in a pan full of clean oil as I assemble an engine.
 
I wouldn't "purposely" put anything between the bearing and block, main cap, rod or rod cap. Think about that for a minute.
 
Its just weirdo wankery. Some farmer does something goofy and calls it voodoo magic...the kiddies are amazed.
Noting against farmers though...:)
All the important info has been Mastered by the original pioneers / stuff today just weighs less and comes from across the pond because Corporations have bought out all the companys just like with MSD.
 
Isky - is one of the Last true US based
Legends left and he might have celebrated his 100 bday this year !!
 
I've yet to see a bearing shell dry of oil upon disassembly.
oil has a way of getting to places with minimal clearance.
 
Every engine I have dismantled the back sides of the bearings have been "wet" with oil so "some" gets in there anyway. I have always dunked the bearing shell in a pan full of clean oil as I assemble an engine.
As a person who pulled wrenches for 25 years and have rebuild engines up to 2,000HP diesels, install bearing shells dry. For the poster that says he never has installed bearings "proud", did you file a couple of thousandths off the ends? Bearings are designed with "crush" built in. The ends of the shells are slightly thinner and as you tighten the bearing cap bolts, the shells are pressed tight into the bores to hold the shells in place. The thin part is so the bearing does not get tight at the sides as it sqishes a tiny bit. The bore surface should have a slightly rough surface "stone honed" for the back of the bearing shell to bite into, and they should be installed dry. The sharp edge of the bearing bore on the tang side should be slightly dressed with a worn hone stone or fine emery on a file. This is so that sharp corner does not peel a sliver off the bearing back as you put then in place. This is tricky while doing a 250,000 mile bearing rollin on a heavy duty engine. The bearings and bores should be dry at assembly for maximum retention at first. Due to the hammering stresses while running, a little oil can work between the bearing shells and the bore. This is generally black and stinks like oil that has been in a fire. Indicates the heat present in normal operating conditions in the bearings when that oil is "cooked".
 
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