carlossolorzano

i have a b18b1 i spun 3rd cylinder bearing will that have damage my crank?

doood

iTrader: (1)

chances are high. main or rod?

whitaker_1991

Your chances are super high! You will more than likely have to take it to a machine shop and ask them to micropolish and balance it.

TheRealTegger

Not that by itself, no. but the oil starvation that resulted in the spun-bearing will have caused significant damage to the crank.

cagedGSR

Oil starvation isn't the only cause of a spun bearing.

FWIW, I've replaced just rod bearings on a 4.3L vortec v6 that developed a knock, no polishing, no special treatment. The motor is still going 3 years later. And the guy tows with it, so it's not babied. Im not saying it's the right way to do things but it is an option. The guy only needed the motor to last a few thousand, but it ran so well he kept.driving it.

It's possible the crank is OK if you didn't drive it after you spun the bearing.

TheRealTegger

No, but it's the most common cause, by far. A lousy rebuild job will do it, too.

carlossolorzano

rod bearing

dlo253

Cant answer that without seeing it. Every case can be different. Youll just have to tear it apart n find out.. I just spun a bearing like last week. In the process of a full rebuild haha...

Ryan96GSR

I'm fortunate I didn't spin a bearing when I purchased my car. I was leaking about a .5L of oil a day until I replaced the oil pan.
Had to check the oil before each start up pretty much lol..

carlossolorzano

took the block apart im just thinking of getting the crank micro polish ...how expensive is that?

mike703

pretty cheap...i cant remember what i paid..but if i remember correctly it was somewhere in the neighborhood of 60 bucks...and im a cheap *** so its not a huge neighborhood

carlossolorzano

and for that i need to take the crank of? and when i take it off it has to be rebalance?

whitaker_1991

I only pay about $50, but it should be somewhere in that range. Just bring them the crank and tell them you want it micropolished and they will take care of it. Just take it to a reputable shop.

carlossolorzano

ohh ok so i can just put it back my self right? it dont need to be balance?

el crapitan

oil starvation can also result FROM a spun bearing though. as the oil orifice on the bearing will no longer be lined up with orifice in the rod or block

dlo253

You better get clearances checked too. Also, pics would still help. Is there any very noticeable markings on the crank journals?