Mercedes ML W163 Tensioner Pulley and Idler Pulley Removal and Replacement ml320 ml430 ml350 ml500

Mercedes ML W163 Tensioner Pulley and Idler Pulley Removal and Replacement ml320 ml430 ml350 ml500
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In this video we are showing you how to remove and replace the idler pulley and the tensioner pulley on Mercedes w163. We demonstrated on a 2000 ML430 but it should be the same procedure from 1998 to 2005 for the v6 and v8 engine which will cover the ml320 ml430 ml350 and ml500.
If you hear a noise coming from the belt it is very likely to be a pulley. The way to diagnose it is to remove the belt and spin them by hand. If they have a play or they are noisy you will need to replace them.
This procedure should work for:
1998 Mercedes w163 ML320 ML430 ML500 ML350 Idler Pulley and Tensioner Pulley removal and replacement
1999 Mercedes w163 ML320 ML430 ML500 ML350 Idler Pulley and Tensioner Pulley removal and replacement
2000 Mercedes w163 ML320 ML430 ML500 ML350 Idler Pulley and Tensioner Pulley removal and replacement
2001 Mercedes w163 ML320 ML430 ML500 ML350 Idler Pulley and Tensioner Pulley removal and replacement
2002 Mercedes w163 ML320 ML430 ML500 ML350 Idler Pulley and Tensioner Pulley removal and replacement
2003 Mercedes w163 ML320 ML430 ML500 ML350 Idler Pulley and Tensioner Pulley removal and replacement
2004 Mercedes w163 ML320 ML430 ML500 ML350 Idler Pulley and Tensioner Pulley removal and replacement
2005 Mercedes w163 ML320 ML430 ML500 ML350 Idler Pulley and Tensioner Pulley removal and replacement
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*Disclaimer
We, World Mechanics, are not responsible for property damage or injury incurred as a result of any of the information contained in this video. Information given in this video does not guarantee the desired outcome. Any injury, damage or loss that may result from improper use of the tools, equipment, or the information contained in this video is the sole responsibility of the user and not World Mechanics.

[@WorldMechanics]

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[@CliffFent]

Hi Guys Thanks for the Straight Forward repair Video.Cliff

[@dunerunner]

Thank you for showing how to get that back bolt in the bent tensioner!!!! This is the best video series for weekend wrenching!

[@raullopez1600]

2002 ML500 W163: Thank you for your very informative video. It truly helped me today. The Idler Pully wore out and broke in half. The serpentine belt fell off the engine at 4:30 am on the expressway. its still out there somewhere. The Battery light came on. Power steering stop working. The engine kept running on battery power and got me all the way home without failing. No power steering was brutal turning corners and parking but I love this car and will never replace it. Thank you once again for your video.

[@elgiacomo]

Pretty much the exact same reason I'm here watching this video. '01 ML320, Tensioner Pulley broke while driving, lost the belt and therefore power steering (luckily less than a mile from home). This video is very informative and helpful! Thank you World Mechanics!

[@SteveEarlcelerityproject]

This seems to be a common issue with the idler pulley. I had it happen to me, I see it happening to just about everyone.

[@gavingregory1119]

Dude, if your belt breaks, don''t drive too far. Your water pump will stop turning and most you'll likely overheat the engine, possibly leading to head gasket issues.

[@chuckstewart5775]

@@elgiacomo how's the car now?

[@elgiacomo]

@@chuckstewart5775 The car is pretty good considering its age and mileage. Driving it every day. Not maintaining it as well as I should due to finances, to be honest. Losing a few drops of power steering fluid. Have to add some oil here and there. But runs strong and drives well.

[@tsommers1]

Terrific video. I was able to do this without removing the fan and kept my fingers more or less intact. I used a couple of socket wrenches linked together to give my assistant an easy way to hold the tensioner aside while I removed the lower bolt. The replacement part had a pin in place so it was no big deal to get to it for the install. I had tried in vain to get a pin in the tensioner to ease in removal but just couldn't get the hole to line up.

[@Luisperez-dc1kn]

Great video on these ML's. You guys are the best. You make it look so easy. Gives me confidence to DIY. Keep up the good work.

[@hectorventayer7603]

Yous are legends. Just saved me heaps. You have great mechanical knowledge.

[@shaimran8933]

bro thanks I did this on my moms ml500 today thanks to this it sounded terrible before

[@colinaglae2605]

Great work guys. Another nice video in the bag.

[@moemoes5989]

Wow great video Brotha, t was nicely done, in-degth and you explained everything so that I understood. I'm looking forward to seeing more videos. When my belt came off, I had 1 of 2 choices before my vehicles ran hot , drive to mercedes shop or home. I decided to drive home to check out a few videos to see if it was something I could do. Now I know how to do it. Thanks!!!

[@terrancelee1096]

great video. big help.

[@cold_as_ice_canuck]

Just saved the day. Thanks brother!!

[@RobertMarshall]

Love your videos! Super helpful, and easy to follow. I'm in the middle of replacing my tensioner pulley, idler pulley and water pump on my 2003 ML500. But, I've hit a snag. I was able to remove the two E-12 bolts that hold the tensioner pulley to the motor block. But, it doesn't seem to want to come away from the motor. Your video makes it look like it should just come right out. is there any trick to extracting it other than removing the two bolts???

[@nigelhungerford-symes5059]

Thanks for the video. Could you please provide details of all the sockets, wrenches and tools you used. I am not familiar with the star shaped socket you used for the top roller. Thanks again for all the great W163 videos.

[@robertpugh804]

Thanks! Needed that

[@WorldMechanics]

+Robert Pugh We are glad to hear that the video was helpful. Thank you for watching and if you ever have any question let us know

[@hoangphudpm8]

Thanks

[@AndyNav1]

2006 ML500 W164 Would you please let me know if the AC compressor pulley can be replaced on the car without removing the compressor itself. Thank you for your help

[@gene1711]

I like your very helpful videos thanks,, How come no one ever cleans their engine?

[@apptech1350]

Any idea what to do if the bolt head for the tensioner is completely rounded off?

[@dilove89]

hello. I recently replaced my tensioner pulley so it's brand new. is possible to just replace the wheel and not the entire tensioner? it warped away when my water pump went out.

[@Matt-yh6we]

Do you guys have a video of crankshaft pulley replacement?

[@stephenmickelson1451]

have 2003 clk430 the idler pully bolt hits radiator. please address this issue as the rad. needs to be moved back or removed

[@LILbreezy423]

my fan clutch compliantly broken off of the engine any subjection ?

[@EndlessXConcertgoers88]

did it actually fit the engine noise problem?

[@wildtan9650]

Where’s the video link to change oil leak?

[@seans2914]

how do you get the fan cover off ????????

[@HectorRodriguez-xx3vg]

Will this make my car to shake ? How you diagnosis?

[@neranebus3530]

What are the bolt torque values?

[@krawnikt]

My idler pulley doesn't have the torx bolt... instead it's just a bearing covert that is completely smooth except for a divet in the center with a small pin dead center. How do you remove?

[@चेतन_महाराष्ट्र]

My Ml320 tensioner pulley doesn't have a bolt to loosen the belt. It's an older type. What to do to get it out?

[@zahirchaudhury9853]

someone tell me what screw it is for the idler pulley

[@orange2352]

Just imagine breaking that idler pulley bolt when reinstalling it! Whats the torque spec on that bolt? 25nm?

[@torahteacher7425]

I have a 2002 ML500 with a broken tensioner pulley. The tensioner itself is fine but the pulley is broken. How do I remove the pulley FROM the tensioner? A replacement pulley will arrive in a few days, so I may have a better idea then. Thank you in advance!!

[@istvanmeissler2238]

Was the bolt in the tensioner pulley right hand thread or left hand thread? Thanks.

[@dorthymorris7503]

Awesome!

[@mikepantelis6562]

I fucking love you bro! Btw same procedure on w211 minus the fan part.

[@DrOdTtg]

Why do you paint your nails lol 😅

[@nicksilvacastro]

Thanks

[@krawnikt]

My idler pulley doesn't have the torx bolt... instead it's just a bearing covert that is completely smooth except for a divet in the center with a small pin dead center. How do you remove?