Rod And Main Bearings

[BahnE30]

here's a question for you guys that know something about the M20 how long do you figure it would take to replace rod and main bearing with the engine still in the car and does the crank have to come out to do this???
car has 370,xxxkm's on it and i don't want to end up with a M20 boat anchor the rest of the motor is tight dosn't burn or leak a drop of oil so it's not time for a rebuild yet..

[Jordan]

I've never heard of a shop that will blueprint/balance an engine while its in the car and assembled...

You are going to need to bring them the crank and rods.

[BahnE30]

so your telling me you cant just pull the caps off and put the new bearings in??? the motor has to come out and be balanced???

[AdamF 88iS]

Don't bother with mains. If it really bothers you you can pull out the rod shells and replace them with another set that's the same size.

[DaN]

Why do you want to replace the bearings if there is no problem with the engine? Are you looking for problems?
Keep fresh oil in it, and Wait till it needs bearings....

[mikeedler]

and how do you know when it needs new bearings????? when its knocking and then needs the crank to be reground!! thats a pretty crappy answer imo

Why do you want to replace the bearings if there is no problem with the engine? Are you looking for problems?
Keep fresh oil in it, and Wait till it needs bearings....

[Stu]

You can do the rod bearings without pulling the motor, you'll just need to pull the oil pan. Balancing and Blueprinting isn't necessary, you'll just need to pick up some Plasti-Gage and get the tolerences within spec.

Rod bearing replacement is good preventative maitanence, and as mentioned by Mikeedler, you don't want to wait until a rod bearing has wiped out and scored the crank....at that point you will need to pull the motor apart for a rebuild. ;)

[BahnE30]

fuck i hate people who talk about shit they don't know anything about

it says right in my first post that i don't want to end up with a boat anchor why would that be when bearings go the crank goes with them.........

thanks Stu and the other people who know what they were talking about

now finally
how much time is involved in this roughly......

[aaron_silva]

1 day.

Aaron

[DaN]

and how do you know when it needs new bearings????? when its knocking and then needs the crank to be reground!! thats a pretty crappy answer imo

Why do you want to replace the bearings if there is no problem with the engine? Are you looking for problems?
Keep fresh oil in it, and Wait till it needs bearings....

I'm willing to bet money that by the time it needs bearings, the rest of the motor will need a rebuild. If you perform regular maintenance, you will probably get rid of the car before it needs bearings. That is of course if oil changes were done regularly throughout the life of the engine.
I think I know a little about this, I've been working on cars for years, and I'm about to graduate from an automotive technical school, and enter the bmw step program.
If you don't like what i have to say, just ignore me, no need to get upset.

lol, it's your time, you are allowed to waste if if you like.
my $.02

[ColdAccord]

fuck i hate people who talk about shit they don't know anything about

you guys ever see chappelles show, the player hater's ball? w/Ice T? They just chanted

HATEHATEHATEHATEHATEHATE

It sounded like dan was trying to say if it needs bearings, it will probably need other things in addition. so why do you hate? just rebuild that shit.

and funny the kid who wont pull his motor and only wants to change his bearings is the one accusing the tech student of not knowing what they're talking about

[BahnE30]

for one it's not my car it my fathers 2 someone wanna tell me anyway you can tell when bearings are going bad in a motor. there isn't and once there noisey it's to late 3. why waste money rebuilding a motor that is tight top and bottom it dosn't burn a drop of oil it's got 374,xxx km's on..

like stu said it's good preventative maintanience

[mikeedler]

I think I know a little about this, I've been working on cars for years, and I'm about to graduate from an automotive technical school, and enter the bmw step program.
If you don't like what i have to say, just ignore me, no need to get upset.

I m not going to get upset, just trying to point out you have no idea what u r talking about! School or not, and "working" on cars, and "about" to "start" the bmw step program doesnt mean anything. replacing the bearings will not hurt anything, and it is definately not a bad thing to do. no reason to give rediculious answers when you are not sure of something.

[ColdAccord]

uungh. the ignorance continues

look. he wont even pull his damn motor. or his dads, should I say. he also is quick to shoot down what dan has to say

the internet cocks are huge here

[BahnE30]

why pull an entire motor if you don't have too..... it just dosn't make logical sense. it's preventative mainteince, if the car was burning oil then the motor would come out and get rebuilt, dad dosn't mind spending money on things that need to be fixed or could cause serious damage if not fixed. as stated several times before theres no way of telling whether it needs rod bearings or not

all i asked was how long to do them roughly not whether or not to do them..
that and i'm still waiting for dan to pull an answer out of his ass on how to tell when rod or main bearings are going