318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Knowledge Base


Knowledge Base How to articles and things explained.

» Recent Threads
Automatic Trans Fill &...
01-07-2018 01:54 AM
Last post by Newbomb Turk
Today 05:54 AM
5 Comments, 420 Views
Black M-Sport Part out...
Yesterday 06:33 PM
Last post by TurboMeTroy
Today 12:07 AM
3 Comments, 246 Views
1997 318ti M Tech 5spd...
01-08-2018 01:04 AM
Last post by mtgoatboy
Yesterday 08:07 PM
5 Comments, 613 Views
S52-Swapped Tintop 318ti...
01-21-2018 03:24 AM
Last post by Strawman
Yesterday 08:04 PM
3 Comments, 606 Views
Euro glass headlights
09-24-2014 11:27 PM
Last post by RandyDangler
Yesterday 07:45 PM
187 Comments, 99,775 Views
Happy Birthday ...
Yesterday 06:00 AM
Last post by 1996 328ti
Yesterday 06:00 AM
0 Comments, 133 Views
Happy Birthday ...
Yesterday 06:00 AM
Last post by 1996 328ti
Yesterday 06:00 AM
0 Comments, 96 Views
new engine build. dasc +...
01-02-2016 02:28 AM
Last post by andakn
Yesterday 05:21 AM
136 Comments, 56,214 Views
Manual Windows
08-30-2010 06:13 AM
Last post by Estii
01-21-2018 10:57 PM
45 Comments, 8,257 Views
Manual windows
01-20-2018 08:58 AM
Last post by Estii
01-21-2018 10:54 PM
2 Comments, 234 Views
Comment Share/Bookmark
Tutorial Tools Display Modes
Idler Pulley Refurb
Idler Pulley Refurb
Published by LouM...
Default Idler Pulley Refurb

I recently replaced the idler pulley due to the squeaking eventually occurs as the bearing gets old and dry. I used a piece of hose as a megaphone to isolate the squeak while the engine was running. Replacing the idler pulley did eliminate the squeak.
Coming from a bicycling background I have rebuilt titanium crank bottom bracket bearings rather than pay the high dollars necessary just to stop a squeaking/creaking bearing. So why not see if I could do the same thing with the idler pulley that I just replaced?
Maybe it's just me, but I tend to save old parts just in case I need them in an emergency. I know they aren't that expensive. But it might save some time in ordering and waiting for a new pulley. Or, just to troubleshoot and repair this bearing before going on to isolate further.
Thought that I would share what I did and add a small piece to this knowledge base that I have used to do repairs on my Ti.

First, the idler pulley as it was pulled.

These are "sealed" bearings. But that doesn't mean that they can't be cleaned and repacked. The sealing ring is made of rubber and is fixed in-place by a lip along the outside of the bearing race. I used a small flat blade jewelers screwdriver to gently pry this ring out from the outside. You can see it partially removed here between 12:00 and 3:00.

Completely removed. The grease is partially gone and there is some dirt and grit floating around in what grease is left. The bearing did spin easily though.

Backside of the sealing rings. Looks like some sort of carbon/graphite insert to make the rubber a bit less compliant.

A closer look at the exposed bearing. Old grease and grit along the outside race.

Clean out the old grease and dirt. Anything that will dissolve the grease will work. I had carb cleaner available and is was a in a spray can so that helped dissolve and blow the stuff out.

Repacked bearing. I just pushed the grease in using a wooden chopstick until I saw it coming out the of other side.

Then put some grease in on the other side and spun it a couple of times to get everything lubed. Do not over pack the grease into the bearing. There wasn't a whole lot in there to begin with and I suspect that it will sling the excess all over the place once it is in use.

Clean up excess and reinstall seals by placing the seal behind the lip and sliding your finger around the bearing while pressing down.

I cleaned up all of the other dirt on the outside and put the idler pulley back in the box and stored in the spare parts bin.
Tutorial Tools

By skimmer on 01-24-2015, 02:02 AM

Excellent write up.I love fixes like these,rather than tossing old one in the trash restore it.
Reply With Quote
By Milkdud on 01-24-2015, 04:43 PM

The cheap bastard that lives deep in my soul loves this
Reply With Quote
By twdavis1 on 01-27-2015, 11:34 PM
Default Excellent Hack!

Well done!
Reply With Quote
By eurohb on 11-23-2015, 06:22 PM

Any updates on the pictures?
Reply With Quote
By xxxJohnBoyxxx on 11-24-2015, 04:19 PM

Originally Posted by eurohb View Post
Any updates on the pictures?
The pictures were most likely on a photo server like photobucket or some other pic server. Your best bet is to contact the member that posted the DIY over PM or even better over email and have him send the pictures. Most times picture servers have a limit of space the member gets for free. If they are close to their max limit they will remove pics to add new ones and that is why there are no pics available in this post.

Just a FYI and best of luck, John S
Reply With Quote


Currently Active Users Viewing This Tutorial: 1 (0 members and 1 guests)
Tutorial Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

Similar Threads
Tutorial Tutorial Starter Category Comments Last Post
m44 engine idler pulley performanceisland Engine 12 04-26-2015 12:10 AM
DASC Idler pulley help please DASC SA Induction 20 01-12-2014 02:33 AM
WTB Idler pulley 98318ti US and North America 3 06-03-2013 07:37 PM
Idler Pulley question JDantuono Maintenance 2 10-20-2010 01:44 AM
Question on upper idler pulley 97 318ti dartman Maintenance 0 02-18-2007 11:58 PM

All times are GMT +1. The time now is 07:02 PM.

Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2018, 318ti.org

Tutorial powered by GARS 2.1.8m ©2005-2006
© vBadvanced CMPS v3.2.2
[page compression: 73.87 k/91.58 k (19.34%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.