Idler Pulley Replacement

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Irving Zisman
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Re: Idler Pulley Replacement

Post by Irving Zisman » Mon Apr 22, 2019 11:07 am

I found the bearing for the tensioner pulley. They are a little more expensive (3 for $20), but still way cheaper than buying the entire pulley.
https://www.amazon.com/Double-Sealed-An ... pons&psc=1

When I decide to press out the bearing on Idler No. 1, I will post up the information on that as well. I have a sneaking suspicion that Idler No. 1 uses 2 of the bearings that Idler No. 2 uses.
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Re: Idler Pulley Replacement

Post by Irving Zisman » Tue May 07, 2019 10:39 am

Well I have figured out the best solution for a faulty idler pulley. I had my old pulleys laying around so I figured I would give this a try, and Ill be damned, it works!
Saw this canuck on youtube clean and repack sealed bearings.



The plastic seal pops right out with a razor blade and pops right back in with your thumbs. I used WD40 to clean out the bearing. There was a significant amount of dirt and rust inside, but a good WD40 bath cleaned it right out. I then packed the bearing with new Mobil 1 grease, popped the plastic seals back on, and I now have brand new bearings. There is another video I watched where a guy opened a brand new sealed bearing and found that they use white lithium grease from the factory so replacing that grease with Mobil 1 wheel bearing grease will make a huge improvement.

This is the only way I am going to handle idler pulley issues going forward in the future.
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Re: Idler Pulley Replacement

Post by Irving Zisman » Fri May 10, 2019 9:54 am

So I decided to open one of the brand new bearings that I bought on Amazon just to see what kind of grease the come with. To my surprise, I found that they dont come with grease, but rather a clear gel type material (could be a type of grease for all I know). There was very little of this "gel" in the bearing. It appeared that someone had taken a syringe and injected a small glob of this crap between the ball bearings. I was disgusted to say the least about the poor quality that goes into these bearings.

This makes me understand now why the idler pulleys dont last for shit anymore. Needless to say, I removed that gel crap and packed the bearing with Mobil 1 bearing grease and reassembled it. After this discovery, I think I will be taking all my new idler pulleys back off the vehicle, repacking them with real grease, and putting them back on the vehicle.

I would have gotten pics of this gel that was in the bearing, but my hands were covered in grease and I didnt feel like touching my phone.

In light of all this research I have done on these bearings, I now have a complete spare set of idler pulleys, all repacked with Mobil 1, as spares in the garage. I also have two brand new bearings as well so I will not be buying any idler pulleys for quite some time :thumbup:
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Re: Idler Pulley Replacement

Post by bovine » Wed Oct 16, 2019 1:50 pm

So for those who are wondering how well the Re-Greasing has been working on the idler pulleys my brother visited recently and while heavily intoxicated he pulled the idler pulleys which were making a clicking noise and repacked the bearings. So far its been over a month and everything is still working nice a quiet. The temperature is dropping very rapidly up here so I will keep everyone informed how things go as the Temps drop below -20.
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My FJ December 29th 2018 Beat that California!
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