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Evo X General General discussion on the 2008+ Mitsubishi Lancer Evolution X

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Old 01-13-2014, 01:49 AM   #1
XRATEDX
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Replacement idler/tensioner pulleys for evo x

So I just wanted to post up about my recent replacement of the tensioner and idler pulleys. I know people talk about going to the Hyundai dealer and getting them and paying close to $200.

I was never aware of the problem with the plastic oem ones (surprisingly considering how much I'm on here). So as others have had happen it shredded on my on the way home this week. Towed the car home and got to work the next day.

I wasn't really a fan of wasting $200 for this so I thought I would look for other options. I found that autozone sells metal pulleys for the genesis coupe for around $16. So I went and picked up 3 of them, the belt, and a 5/8 copper washer. Pulley is Part Number: 231052 @ autozone.

Install was simple remove the 2 idler pulleys and replace with the new metal ones. The tensioner is reverse threaded and you remove the plastic one, place copper washer on the tensioner followed by the pulley. Then tighten, put new belt on and your done.

The top idler pulley barely makes contact on the motor side. So you can either very slightly grind it down before putting it on or the lazy road I took and just leave it. After about 75 miles you barely hear it because it's already ground it's self down and soon I'm sure it won't make a sound.

So all the parts only cost me $85 vs just the pulleys for $100 more or some of the kits you can buy which cost over $250.

I will update if anything changes or if I have any problems to warn for those who do it in the future.


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Old 01-13-2014, 02:08 AM   #2
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Nice work man. thanks for posting this. I've been debating replacing mine, now I'll be updating for sure. Any pics of the dead, old pulleys?
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Old 01-13-2014, 02:28 AM   #3
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The middle and the right were the idler pulleys and the left was the tensioner. The tensioners wear was all in the middle and both idlers wore evenly. You can see how much the idler pulleys have been worn when comparing to the tensioner. My car is just under 60k miles.






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Old 01-13-2014, 04:13 AM   #4
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Did it make any sounds at all or did you notice any form of indication that it was about to go
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Old 01-13-2014, 04:18 AM   #5
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Did it make any sounds at all or did you notice any form of indication that it was about to go
I noticed occasionally the belt was slightly off the power steering pulley. But other than that no. Just driving normally and I started hearing something making a clunking noise in the engine bay and that was all.


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Old 01-13-2014, 05:41 AM   #6
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What model years is this for? What are the impacts of not changing them out?
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Old 01-13-2014, 05:47 AM   #7
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What model years is this for? What are the impacts of not changing them out?
I believe all years use plastic. Someone correct me if I'm wrong. Impacts are belt either starts to fall apart due to not sitting correctly on all the pulleys, falls off or both.


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Old 01-13-2014, 07:10 AM   #8
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https://www.evoxforums.com/forums/sho...ight=tensioner

Here is the original, now the Autozone is way cheaper.
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Old 01-13-2014, 12:01 PM   #9
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Quote:
The top idler pulley barely makes contact on the motor side. So you can either very slightly grind it down before putting it on or the lazy road I took and just leave it. After about 75 miles you barely hear it because it's already ground it's self down and soon I'm sure it won't make a sound.
Any contact at all on the two static idlers means poor quality control in the product - maybe swapping around the idlers around will give you the clearances you need?

The only one that needs any adjustment, when using real Hyundai idlers, is the idler mounted on the tensioner assembly.
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Old 01-13-2014, 03:15 PM   #10
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Any contact at all on the two static idlers means poor quality control in the product - maybe swapping around the idlers around will give you the clearances you need?

The only one that needs any adjustment, when using real Hyundai idlers, is the idler mounted on the tensioner assembly.

The metal pulleys width is slightly bigger than the oem by 1.5 mm which is why contact is made on the top one.


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