This is great. My w212 e350 seems to need new idler and tensioner pulleys every 30k miles or so. They get noisy when the first cold day, 30 degrees or so, occurs in the fall.
@@darryld8200 I did replace my own. I bought a kit from fcpeuro.com that had two idler pulleys, tensioner pulley, and a new belt for $150 US. It was straightforward. Remember to take a picture of how the belt is routed BEFORE you remove the belt. My cam seals also were leaking at about 60k miles. I bought mine as a CPO with an extended warranty so they replaced them under warranty. The dealer told me it was a common issue.
@@xabizar 2722021419 is the top pulley which does not include a new bolt 0019904803 is the bolt part number. 2722021019 is the lower idler pulley and does include a new bolt. They are indeed two different parts. FYI the tensioner is 2722000270. I got them all from fcpeuro.com. Very easy to change yourself, don't overtorque the bolts.
Your channel was recommend by a viewer of a video on my channel where My 2012 Mercedes Benz c300 is making a very loud noise on cold start up... I was hoping I'd get to hear the car running before you fixed the issue that way I could compare the sound/noise to mines but maybe next time..
Torquing this one to 30nm is mandatory with an aluminium block and absolutely no need of threadlocker... I've seen so many threads destroyed by overtightening (been working at MB for years) , you must follow mb procedures and torque specs if you want your engine to last long (especially 272/3 engines). They have been not defined randomly in the WIS, there's a good reason for that!
Always find your videos enLightening. Found myself using them a LOT! On a side note, I'm not sure how I missed it before but I use the same Light I saw in the closing of your vids. Again, thanks Bro for the great vids.
I changed all those idler pulleys and tensioner pulley. Still get the crickets. I guess I should check the alternator, water pump, power steering and AC pulleys.
thanks for explaining which side is which, the ones with the bumps/raised pimples faces you on reinstall. You would think the mfg'r would indicate front/back. Again - THANKS
I have a 2007 gl450 annex I have replaced the alternator, serpentine belt, and the idle pulley. But my alternator is smoking when I start the car. I'm not sure whaT is wrong. Do you think you can help me. I also can't remember where my grounding wire is to be connected on the alternator
Weird question brother, I have a weird "supercharger" sound with my s550 (m273 5.5 v8) The sound shouldnt be there, since its an N/A engine. I just replaced the alternator which had some movement in it, but that wasnt it. It is belt driven since the sound only is there when the belt is on. There is nothing leaking anywhere. Also, the sound comes up when the engine hits 50C, under that temperature, no weird sound You might have any idea what it is?
You can change just the pulley on the tensioner but if your tensioner is around 60k miles and the markings are off alignment, then I’d replace the whole assembly, not just the pulley. Because the spring loosens and wears over time, and even if you replace the pulley and it’s quiet - you may be fooling yourself…your belt is not properly tensioner and your accessories aren’t spinning correctly as they should
How much whining noise was left after leaving the ac like that? I have slight whine and the ac bearing makes less noise then yours when spun separately.
Hi Keith, Please advise. I have a B200 diesel W245 I have shredded 3 serpentine belts already, I replaced 2 noisy freewheel pulleys 3rd to be replace soon, Changed new bearing in the Ac Compressor (Pulley was wobbly) and both bearings in the alternator(one was noisy). Also serviced the Alternator clutch pulley. Checked the main crank pulley but this was fine on a visual inspection also pushed it a little with a screwdriver and it didn't move, Water pump feels fine and no noise coming from there, but it looks like the belt strips form the back and then comes apart like a clean cut diagonal across the belt. Also tried to take off freewheel pully between ac compressor and waterpump and bent my size 10mm spanner ? Any help or suggestions would be greatly appreciated. First time working on a Merc.
I have a rattling/loose crank pulley in a 2014 c250 auto. Is it usually the case to simply change the pulley as in this video, or could it be a more sinister issue further inside the crank?
it depends. Did you wiggle it around with your hand? I would replace that pulley to see if the noise goes away (since it is loose it needs to be changed) then move on from there. Often times more than one pulley needs replacing.
iRepair Autos thank you. Your videos are great! They've helped me with the intake manifold replacement and others. Just enough detail but not too long.
Got this AC kit out of Miami for my W210.Easy to install. Will need to evac the system before removal and charge up with r143a refrigerant after.www.ebay.com.au/itm/222029722817
Mine is exactly like that... 06 280 4 matic.. that idler pulley you replaced...on mine it has a washer on it and I have had the belt shredding ever since I replaced it... any ideas... I used laser to align alt and PS pully from crank as reference and those are accurate.... and used straight edge to align the smooth and ribbed idler pullies with the water pump pully but belt still begins to wear and eventually jump off or gets shreaded with a couple weeks...any ideas?
You’ll know when it snaps. Power steering gone, then the battery light comes on and then your temp climbs quickly. Happened to me on Sunday just before I pulled onto my drive. So not something you can miss 😀
You can. But that’s usually just to tell if your noise is coming from the front of the engine. If you already know that, then taking the belt off and running the engine for a quick minute won’t yield you any meaningful conclusion
Just in cold starts there's a light rough 2 seconds clanking noise. Most of the time it does it, but not always. Supposedly it's common. Do you know about this? Some say is oil pressure related, and that is a different problem than the crank shaft gear, supposedly is the crank shaft bearing or something like that. I my w164 272 I use 0w40 synthetic Mobil 1, next time I try 5w40 or 10w40 (merc spec) . To cancel the oil theory Have you had this issue?
Why do you put a thread locker at the END of the bolt, that does not even goes into the hole. You using it wrong man, you should put it on the BEGINNING of the bolt...
Hi, Please watch my 2012 ML350. Do you think the noise is because of idler pulley? This comes only during cold starts (only first start in the morning and not later starts). Moreover it does not come in the summer or warm weather. I just replaced the PCV valve and intake gaskets due to P2279 error. This noise was there even before replacement but till date has never been an issue. I also changed serpentine belt an year back. Please tell me what your think after watching the video - ua-cam.com/video/i22xJQbI8sM/v-deo.html
Just how car repair videos should be! you rock, thank you for the upload. Helped my issues out dramatically.
Wish you had turned the engine over to hear the noise
You’re a straight G 🙌🏼 great camera work, description, step by step. Much appreciation
I like how you take care to do your video's with such great detail and the video editing is very visual and you see great detail. Thank you.
Very steady hands when taking the video & step by step instructions are clear. Good job !
Thank you. I took my car to a mechanic and after changing the belt I can still hear the squeak. I feel competent ow thanks to you.
Great video, instructive, no extra BS - thanks!
Good demonstration of the good vs bad idler pulleys!
Your videos have really saved me some dollars. Thank you and keep up the good work!
THANK you..... I could not figure out how to remove those pullies as I didn't know about those little caps hiding the bolts! Again, thanks!
This is great. My w212 e350 seems to need new idler and tensioner pulleys every 30k miles or so. They get noisy when the first cold day, 30 degrees or so, occurs in the fall.
did you manage to replace them? I got a quote fro. the dealership they want $116 + labour and gst...
I also need my camshaft adjuster magnet seals and hall sensor seals replaced. $ 385....
@@darryld8200 I did replace my own. I bought a kit from fcpeuro.com that had two idler pulleys, tensioner pulley, and a new belt for $150 US. It was straightforward. Remember to take a picture of how the belt is routed BEFORE you remove the belt.
My cam seals also were leaking at about 60k miles. I bought mine as a CPO with an extended warranty so they replaced them under warranty. The dealer told me it was a common issue.
@@juicebox22a could you tell me the part number of the idler pulley? The two idler pulleys shown in the video seem to be different right?
@@xabizar 2722021419 is the top pulley which does not include a new bolt 0019904803 is the bolt part number.
2722021019 is the lower idler pulley and does include a new bolt.
They are indeed two different parts.
FYI the tensioner is 2722000270.
I got them all from fcpeuro.com.
Very easy to change yourself, don't overtorque the bolts.
Very helpful, including the additional audio comments. Thanks.
This is a great video. Thank you. I have searched and searched. I may make one myself. There isn't many out their.
Looking forward to seeing you solve the coffee grinder sound the AC pully makes.
That's a nasty one.
Incredibly helpful, thanks very much 🙏
Glad I found your channel new owner of a 06 ML350
Thank you.people who takes time make clearly videos.give ideas.lorning person thanks
Yes 👊🏾 thanks for this I’m going to get it done this week
Thanks you from France!
Hey, Thanks for that video- Are you going to make another one about replacing the AC pulley?
Mine has the exact same noice on the air conditioner compressor pulley . Great vid
Your channel was recommend by a viewer of a video on my channel where My 2012 Mercedes Benz c300 is making a very loud noise on cold start up... I was hoping I'd get to hear the car running before you fixed the issue that way I could compare the sound/noise to mines but maybe next time..
Thank you..I have somewhere to start now and locate the annoying squeak on my 2001 C class.
Torquing this one to 30nm is mandatory with an aluminium block and absolutely no need of threadlocker... I've seen so many threads destroyed by overtightening (been working at MB for years) , you must follow mb procedures and torque specs if you want your engine to last long (especially 272/3 engines). They have been not defined randomly in the WIS, there's a good reason for that!
enjoyed your video have a 2011 exactly like that
Always find your videos enLightening. Found myself using them a LOT! On a side note, I'm not sure how I missed it before but I use the same Light I saw in the closing of your vids. Again, thanks Bro for the great vids.
Great video. Thanks.
Clear and well explained. Thank you sir.
Wow, thanks dude. I have a W211 and your video is the best for showing whats going on , very well filmed. Thanks :-)
Just what I needed Sir.
Thanks
1st time visitor,
L.D.G.
Oh man, you saved me so much money. Subbed!
Very details diagnostic method...
U just saved me a lot of money. Appreciate you
Great vid. i try and zero in a bit first with the engine running with a stethoscope. My last time was a bad water pump.
Yes that works as well. Thanks for commenting and watching!
I changed all those idler pulleys and tensioner pulley. Still get the crickets. I guess I should check the alternator, water pump, power steering and AC pulleys.
Thanks. Was looking which side faces out on the ider for my M156. Thanks man!
Straight to the point! Thanks for the great info!
What a lot of sites don’t say is it much easier if you take the radiator fan out first. Especially on the 320
You know what ? You're doing this much better than many of the charlatanes aqui. You;re very welcome - thanks ;))
Clear instructions.thx man
I would love to see an video that shows procedures for removing and replacing Alternator for C300 Mercedes 2008 or similar. Thanks
Very informative and precise video thanks!!!
I really like your videos.
Thank you for great video and advice.
good job on your videos- they helped me with my issue
Hello I have a sprinter just had a new tensioner fitted and new belt I've just noticed the tensioner is juddering?
Good video , Cheshire UK
thanks for explaining which side is which, the ones with the bumps/raised pimples faces you on reinstall. You would think the mfg'r would indicate front/back. Again - THANKS
U answered my prayers
Thank you. Very clear video.
I have a 2007 gl450 annex I have replaced the alternator, serpentine belt, and the idle pulley. But my alternator is smoking when I start the car. I'm not sure whaT is wrong. Do you think you can help me. I also can't remember where my grounding wire is to be connected on the alternator
hello, as always great video ... see you soon...
Good shyt frfr, I'm sure I need to replay e couple pulleys.
Thanks.
Weird question brother, I have a weird "supercharger" sound with my s550 (m273 5.5 v8)
The sound shouldnt be there, since its an N/A engine.
I just replaced the alternator which had some movement in it, but that wasnt it.
It is belt driven since the sound only is there when the belt is on.
There is nothing leaking anywhere.
Also, the sound comes up when the engine hits 50C, under that temperature, no weird sound
You might have any idea what it is?
Very clear,many thanks👍
Great thanks mate
This work was Fair and Perfect!! tsk bro.
Great video
Is there a part number to just replace the pulley on the belt tensioner? The tensioner is in good shape, just the pulley is making noise.
You can change just the pulley on the tensioner but if your tensioner is around 60k miles and the markings are off alignment, then I’d replace the whole assembly, not just the pulley. Because the spring loosens and wears over time, and even if you replace the pulley and it’s quiet - you may be fooling yourself…your belt is not properly tensioner and your accessories aren’t spinning correctly as they should
Why does my tensioner have a shock attached to it?08 c300 manual
very helpful.
Should be a locking pin hole for the tensioner, to hold it off
How much whining noise was left after leaving the ac like that? I have slight whine and the ac bearing makes less noise then yours when spun separately.
You did not check the water pump? How do we need to replace it? Thanks and regards
Genius!
I have 2014 E350 4matic and it just started making that noise. How can I find the one that needs to be replaced?
with the engine off - squirt a little W40 in between the bolt and the pulley.
Hi Keith, Please advise. I have a B200 diesel W245 I have shredded 3 serpentine belts already, I replaced 2 noisy freewheel pulleys 3rd to be replace soon, Changed new bearing in the Ac Compressor (Pulley was wobbly) and both bearings in the alternator(one was noisy). Also serviced the Alternator clutch pulley. Checked the main crank pulley but this was fine on a visual inspection also pushed it a little with a screwdriver and it didn't move, Water pump feels fine and no noise coming from there, but it looks like the belt strips form the back and then comes apart like a clean cut diagonal across the belt. Also tried to take off freewheel pully between ac compressor and waterpump and bent my size 10mm spanner ? Any help or suggestions would be greatly appreciated. First time working on a Merc.
Great video! What was that blue stuff you put on the screw?
locktite.
There's a hole to hold the tensioner pully right ?
Yes
Perfect
I have changed the guide pulley and is still giving me the same squeaky sound at start up
Any thoughts on that
It could be one of the other pulleys
What did it sound like I have a 2010 c300 and it sounds like a gridning rubbing but idk if it is something serious or a pumly
I recently had that same issue here’s whey mines sounded like
ua-cam.com/users/shortsGqO79GpasBg
My car noise starts when I start my car it gets louder when I accelerate,the noise is still there when it’s standstill and the engine is started?
Thank you!!!
Good video. I have a C250..What model is that?
what motor is this? it looks like a m156?
Where do i geet a 2006 mercdes c230 power steering pully only
I have a rattling/loose crank pulley in a 2014 c250 auto. Is it usually the case to simply change the pulley as in this video, or could it be a more sinister issue further inside the crank?
it depends. Did you wiggle it around with your hand? I would replace that pulley to see if the noise goes away (since it is loose it needs to be changed) then move on from there. Often times more than one pulley needs replacing.
So much room for activities…lol. Did you have to take out the fan to have enough room to get to the belt?
My ac and ps pulleys dont make noise but they don't continue to spin when I spin them. Is that bad or normal?
Whats is the torque on idler pulley?
Should all of the pulleys be replaced at the same time even if they aren’t all bad at this time???
Only if bad
How much torque do you put on the bolts? 10lb/ft?
hi can u tell me 2009 gl450 air compressor fuse relay location
What about the other pulleys?
hey are you still around - survive Covid?
Dude you couldn't let the car run so people can compare the sound. UFFF
am iTrippin or did he not test the water pump
lol. I isolate and only fix what needs to be done.
Where are you located?
If the A/C pulley is bad do you have to replace the entire air conditioning unit? I couldn't find a separate A/c pulley that they sell.
You would have to change the whole part..
iRepair Autos thank you. Your videos are great! They've helped me with the intake manifold replacement and others. Just enough detail but not too long.
I think this clutch can be replaced climateam.com.pl/pl,sprzeglo-kompletne-do-sprezarki-denso-6seu16c-mercedes-105mm-5pk,0,139,171,199,3220.html
Got this AC kit out of Miami for my W210.Easy to install. Will need to evac the system before removal and charge up with r143a refrigerant after.www.ebay.com.au/itm/222029722817
Mine is exactly like that... 06 280 4 matic.. that idler pulley you replaced...on mine it has a washer on it and I have had the belt shredding ever since I replaced it... any ideas... I used laser to align alt and PS pully from crank as reference and those are accurate.... and used straight edge to align the smooth and ribbed idler pullies with the water pump pully but belt still begins to wear and eventually jump off or gets shreaded with a couple weeks...any ideas?
what happens if the power steering pulley goes bad how do you know
It may become noisy, rough to turn by hand. Those are the warning signs. Sudden failure, breakage comes next if ignored
You’ll know when it snaps.
Power steering gone, then the battery light comes on and then your temp climbs quickly.
Happened to me on Sunday just before I pulled onto my drive.
So not something you can miss 😀
Can i turn on the engine with out te belt, just a few seconds to listen?
You can. But that’s usually just to tell if your noise is coming from the front of the engine. If you already know that, then taking the belt off and running the engine for a quick minute won’t yield you any meaningful conclusion
What's the torque specs for the pulley?
I use 16 Nm.
Is there any way you could speak up a bit... At times it sounds like your whispering. Thanks so much
Just in cold starts there's a light rough 2 seconds clanking noise. Most of the time it does it, but not always. Supposedly it's common.
Do you know about this? Some say is oil pressure related, and that is a different problem than the crank shaft gear, supposedly is the crank shaft bearing or something like that.
I my w164 272 I use 0w40 synthetic Mobil 1, next time I try 5w40 or 10w40 (merc spec) . To cancel the oil theory
Have you had this issue?
..
John.
The locktide has to be at the end of the bold .....
Why do you put a thread locker at the END of the bolt, that does not even goes into the hole. You using it wrong man, you should put it on the BEGINNING of the bolt...
super👍👍👍👍👍☆☆☆☆☆
Lagit
✌️😉
Hi, Please watch my 2012 ML350. Do you think the noise is because of idler pulley? This comes only during cold starts (only first start in the morning and not later starts). Moreover it does not come in the summer or warm weather. I just replaced the PCV valve and intake gaskets due to P2279 error. This noise was there even before replacement but till date has never been an issue. I also changed serpentine belt an year back. Please tell me what your think after watching the video - ua-cam.com/video/i22xJQbI8sM/v-deo.html