Resolved Replacing main/rod bearings with motor in car

[BlackHalo]

My built 6 bolt(only 10,000 miles) was making a knocking noise when the motor was cold and would go away when the motor warmed up. I decided to pull the caps and see what's up and aside from slight wear/etc nothing seems to be tooooo bad. I think my problem lies elsewhere.

So, instead of bolting to old ones up i ordered some new acl's to throw in there, the journals look perfect but i just didnt want to re-use the old bearings since they were already out. So, my question.. is there anything wrong with doing this? Any tips when changing them? Also, there were no shaving's in the pan or free play in rods/crank.

Thanks, Anthony

 

[Elvenhome21]

That way is fine if you have room. I have done it that way before, it can be a pain to change the upper half of the mains but probably easier/quicker than taking the motor out. Just keep everything clean and use grease when you put everything together. Your problem is probably lifters or something along those lines. (my car does the same thing) You might want to cut your oil filter apart just to make sure that there aren't to many shavings in it.

 

[Defiant]

If your balance shafts haven't been removed, the noise could be from their bearing(s).

 

[BlackHalo]

If your balance shafts haven't been removed, the noise could be from their bearing(s).

yes they have been removed, i was thinking lifters as well but i put the car on all 4's and it seemed to be coming from the oil pan. It cant be anything to bad dsmlink is not reading knock when at idle or cruising. Was just making sure putting the bearings in through the pan was ok. So, this is do-able? It does look tough as hell to get to the top of the mains w/o scratching everything up, would it be worth paying a shop a couple hundred bucks to do it?

 

[T9S1i]

pm pneumo on this site. I know part of his yearly maintanence is to change out his bearrings. He can probably help you with any questions you need answered.

 

[gixrman]

Have you checked your harmonic balancer? When they start to go it will sound that way.

 

[BlackHalo]

i'll check the balencer after i replace the bearings, and i'll pm that guy. But this can be done with the crank still intact?

 

[Elvenhome21]

Yes, What i have done in the past is take an old rod bearing and bend it straighter and you can use that to jam out the old top bearing. Once the bearing is out get the new one greased up and set it in there and try to rotate it in. The first 1/8 of the turn is normally the most difficult because you can't grab on to it for shit. But it isn't to hard if you can rotate the crank a little bit and hopefully it will turn it in. Just make sure you don't rotate the tab in first, IT will wreck the bearing and you will have to take it out and redo the tab or replace the bearing.