how does the piston wall get a splash of oil. people saying the piston dips down into the crankcase thats a lie.. the piston doesn't go down that far in fact it doesn't even leave the cylinder wall.. but another thign does the counterweight on the crank atleast get dip into oil as it spins.,. if so i understand but how does the piston rings and cylinder walls get its oil kinda clueless.. did research in skool and on google.. kinda stumped here.. infact its a homework project.. and the book doesn't show explaination..


cliff note how does the piston rings and walls get lubricated.. thru what not from the crankcase though thanks..

 

The rods have oil passages. On the B-series VTEC engines, there are oil squirters that spray the pistons/cylinder walls.

 

That's waht I thought, but wasn't sure, I knew for sure that the ITR had oil squirters... but wasn't sure about the others. Thanks for clearing that up dogg.

 

Indeed. The oil squiters help to keep the pistons cool and lubricated at high RPM. That is a major deficiency of a LS/VTEC.

 

ok but i'm not talking about vtec motors.. motors in general.. how does the walls and rings get it oil from.. i know it doesn;t go far down enough to get a peice of it from the crankcase..

 

It goes through the rods to the wrist pins to the cylinder walls. There are oil passages to make the connections.

 

i see it now.. its on the rod itself.. it goes from the crank oil passagge to the bearing.. from the bearing.. up to the bearing rods.. from the rods into the cylinder rings?

how does the compression ring keep itself from burning oil.. if the oil ring is down below. so b4 the ring scrapes it off the walls. the compression ring would have some oil on it b4 and than the oil rings and down back into crankcase.. anybody follow?

 

The oil is applied to the cylinders below the oil ring. The compression rings wipe most of the remaining film downwards below the combustion.

 

still lost.. okay so the oil ring lubes the walls.. now when the piston goes down.. wouldn't oil get on the2 top rings which is compression before it gets on the oil rings? so it burns oil that way? lost..

 

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