How to safely change crank bushes

Discussion of technical issues and ideas (engine, chassis)

Moderators: P3g4sus, Daniel, rat, Draco, Riekert

Post Reply
User avatar
phoenix s14
Over Boosting
Posts: 1102
Joined: Tue Aug 12, 2008 8:01 pm
Car: S14
Engine: SR
Real Name: Mark Appelgryn
Location: Boksburg, Gauteng

How to safely change crank bushes

Post by phoenix s14 »

After some shocking and horrific stories of crank bushes being cut-out, hacked, chipped and what not I am going to reveal what seems to be the secret to removing/replacing these (and other similarly fitted) bushes.

1. make sure you have suffient access to where the bush is located.

2. make sure the area in front of the bush is clean.

3. fill the area behind the bush and 2/3 of the bush with grease. (preferably a nice thick one like CV joint grease and obviously the backend has to be closed off.)

4. Find a shaft that slips nicely into the bushing (as little clearance as possible is a must)

5. Gently tap the back of the shaft with a rubber mallet/hammer.

6. the pneumatic force of the grease behind the bush will gently push out the bush from where it sits.

7. Once removed clean the inside of the crank (or other) and fit the new bush. REMEMBER these bushes are made of oilite which should be oil/grease filled. This is done as follows:
Weight kills all the fun - Jeremy Clarkson
User avatar
widowmaker
200SX Maniac
Posts: 3051
Joined: Wed Aug 02, 2006 9:50 am
Car: S13
Real Name: Walter
Location: im from another planet?
Contact:

Post by widowmaker »

great, now where can i find this bush?
User avatar
phoenix s14
Over Boosting
Posts: 1102
Joined: Tue Aug 12, 2008 8:01 pm
Car: S14
Engine: SR
Real Name: Mark Appelgryn
Location: Boksburg, Gauteng

Post by phoenix s14 »

Treating your new oilite bushes:

1. hold the bush closing one of the two sides with you thumb or whichever finger you can.

2. Fill the bush with oil/grease (grease will be more difficult later)

3. close the other end of the bush now with another finger.

4. now press hard on the 2 sides.

5. when done correctly you will see oil/grease sweat from the outside of the bush.

YOUR NEW BUSH IS NOW TREATED AND READY FOR INSTALLATION!
:D :D :D

Hope this helps someone. :wink:
Weight kills all the fun - Jeremy Clarkson
User avatar
phoenix s14
Over Boosting
Posts: 1102
Joined: Tue Aug 12, 2008 8:01 pm
Car: S14
Engine: SR
Real Name: Mark Appelgryn
Location: Boksburg, Gauteng

Post by phoenix s14 »

This is applicable to all oilite bushes and especially your crank centre bush (the one in the centre of the crank on the flywheel side)

I got a new one with the new SPEC clutch I got for my SR. ALSO recommended. Buy a proper clutch kit. I got my SPEC clutch from Import Parts for cheaper than OEM from Nissan.
Weight kills all the fun - Jeremy Clarkson
Post Reply