Oil Shaft bearings *Installation Help*

[Deathseeker31]

Hello Everyone,

I am in the process of building my 7MGTE and my machine shop hot tanked the block. I just replaced the freeze plugs and will be replacing the oil shaft bearings. My question is what can i use to shim the bearings? Once the bearings are pressed in the clearances are out of spec on these new bearings. Any help or suggestions is greatly appreciated. Thank you.

Ricky L

 

[hvyman]

Cant shim bearings. Either have to get different sized bearings or different drive shaft.

 

[I6Boost]

Why are you installing your oilshaft bearings yourself? Or do you got the tool?

Machine shop installed my oil shaft bearings.

But yea dont shim the bearings lol...

 

[hvyman]

Ummm you can install them your self.

 

[Deathseeker31]

The machine shop didn't do it for a few reasons. The bearings come from Toyota in only one size, the situation is that once the bearings are installed then the clearance is too tight, HVYMAN what you are saying is that once you install the bearings the shaft should go in with no problem? WITHOUT modifying anything on either part? is this what you experienced when you installed yours? thank you for the response guys.

 

[CyFi6]

When you replace them they will be extremely tight. you have to either machine the shaft journals down or cut/sand down the bearings. I found that they were slightly out of round as well, so i chose to sand the actual bearings down until the shaft fit perfect and rotated nicely. They dont bear a lot of load, but you want the clearance in specs to keep your oil pressure up. Also, be careful about getting debris in your engine, you will want to final clean the block after you do all this

 

[Another MkIII]

When you replace them they will be extremely tight. you have to either machine the shaft journals down or cut/sand down the bearings. I found that they were slightly out of round as well, so i chose to sand the actual bearings down until the shaft fit perfect and rotated nicely. They dont bear a lot of load, but you want the clearance in specs to keep your oil pressure up. Also, be careful about getting debris in your engine, you will want to final clean the block after you do all this

Its for that reason I chose to have my machine shop do it. Three questions you should ask yourself (this holds true in almost any kind of work you do on your car, not just this situation):
Can I easily screw it up? (Can be due to lack of experience or tools)
Is screwing it up likely to cause bigger problems? (Causes other damage or premature failure)
Is there somebody else better prepared to do this? (Experienced friend or a reputable shop)
If you can answer yes to all three, it is a probably a good idea to have somebody else do it or get some help.
-Am3

 

[I6Boost]

Its for that reason I chose to have my machine shop do it. Three questions you should ask yourself (this holds true in almost any kind of work you do on your car, not just this situation):
Can I easily screw it up? (Can be due to lack of experience or tools)
Is screwing it up likely to cause bigger problems? (Causes other damage or premature failure)
Is there somebody else better prepared to do this? (Experienced friend or a reputable shop)
If you can answer yes to all three, it is a probably a good idea to have somebody else do it or get some help.
-Am3

Agreed, kinda where i was getting at as i aforementioned....

I didnt mean it by its impossible to do it yourself...

And CyFi6 its probably not a good idea to tell others that if there bearing is too tight
just sand it down till it fits...

If you had your block rebuilt there such as hottank, milled etc etc alot of times they will just
install the oil pump drive shaft bearings for you if you just give them to them...

If not majority of the machine shops will only charge $20-$30.

I'ts impossible for our human hands to hold the exact same pressure on a piece of sand paper and sand
down bearings to spec ALL the way around...

Your already this far into your motor, mise well do it right and do it once.

 

[Deathseeker31]

Thank you CyFI6 i appreciate the resonse.
The machine shop didn't have the right tool or didn't want to do it. I asked them to take care of it but they didn't want to do it. Therefore I am not dealing with them anymore in regards to that matter.
Everybody else the person helping me assemble the motor has the tool to install the bearings, we just need to figure out the clearances. Installation is not the problem, it is the clearances since the bearings come from Toyota in only one size.