HOW TO: Acc bearing replacement for JZ

[Shakotan_Aaron]

Hey guys,

Very easy job to do, maybe worth while when doing a 100k service etc. I just did it for the hell of it as I was going to the bearing shop anyway, one less thing that can fail later. I tried to put it in FAQ but seems may need a mod to move it. We don't really have anything for tech articles here.

Bearing shouldn't cost any more then $10-15

Bearing PN: 6203
Tools needed: mallet, 14, 24, 30mm sockets + ratchet
Optional: WD40 (or equivalent), clearer, paint

1.Remove acc belt

2.Remove 14mm bolt from tensioner arm



3.Turn the pulley upside down and place onto something solid other then metal or concrete (you don't want to damage the pulley). Then using a socket or something similar (i used a 24mm), give it a few firm hits with a mallet. I prefer a mallet over a hammer for this sort of thing, but I guess a hammer would do.





4. Wipe where the bearing came from with a rag to get rid of any shit, if you want to give it a coat of paint, now it the time to do it. I gave mine a quick rub with 1000 wet and dry then wax 'n' grease remover then a flick with some rattle can export gloss black and sat in the sun for a few hours.

5. Grab your new bearing a cleaned pulley. The bearing is a sealed unit and is pre-greased. I put a little bit of spray lube in before I hammer bearings, don't use grease as it makes a mess and wont dry out like a thin lube such as WD40 meaning the bearing could potentially move, plus the grease will seep out and flick everywhere!

6. Align the bearing and gently tap the bearing with a correctly sided socket or similar, I found a 30mm size to be perfect. Only make contact with the outer race, never hit from the grease seal or inner race or you will damage the bearing. The old bearing didn't matter as it was being binned. The first few taps are where its most likely to go wonky. As it starts to go in you can hit a little harder but keep it going in evenly or it will jam and not want to move.

(For the purpose of demonstration I have used the old bearing as I already installed the new one prior to taking photos)



7. Your pulley should now have a nice new fresh bearing for worry free motoring! before reassembly rest your finger in the little hole and spin it with your hand just to ensure that you haven't damaged the bearing and that it spins smoothly. Its normal to have some resistance as its the grease inside.



8. Refit the pulley to tensioned arm and refit belt (or new belt as the case maybe) and your DONE

[jondee86]

Fully endorse this as preventative maintenance !! When the bearing in mine seized, it
rooted the pulley and shredded the belt. Got gouged $120 for a secondhand tensioner
plus the cost of a new belt. Nice writeup

Cheers,,, jondee86