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Idler pulley bearings go BOOM! (pics)

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Old 03-23-2013, 08:56 PM
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'12 E63, E55(sold), C32 (sold), '65 Skylark GS 445 convertible, '12 ML350
Idler pulley bearings go BOOM! (pics)

Sooooo...Sunday night after coming home from a concert (KMFDM...and it was awesome) we pull into the garage and my girlfriend goes, "What is that SMELL?!??!"

Well...in retrospect, I now instantly recognize the smell as burnt belt rubber....but since I'd detailed the car earlier in the day and had really dug in on my exhaust tips with a ton of polish, I thought it was the smell of the leftovers burning off.

Thursday morning coming home from the gym, I notice NO boost. None. Zero. Felt like I was driving a C240 4Matic wagon (OK...not that bad, but still it sucked). I park in the garage and pull off the engine cover and there's a belt sitting right there, snapped in half. Look at it and confirm it's the original belt so I think little of it and call Buckhead Imports Performance and tell them what I think it is.

Drop it off in the morning... an hour later Tony calls me and goes, "ummm ... I know why your belt broke...."

Idler pulley with shredded bearings and the snapped belt:



Closer look at the idler pulley (the bearings look like itty bitty strips of linguini stuck in there):



As usual...they knocked it all out in a few hours for me...also hit my Service G ... and had me back on the road with full power back on.

The B.I.P. guys really rock and take care of their customers. I know MB Buckhead would have had the car at least another day.

I hadn't heard of this pulley blowing out on anyone yet so I thought I'd share the issue.

And sorry I haven't been on the board much - been neck (i.e. checkbook) deep in another complete restoration that should be done in about a month!
Old 03-23-2013, 09:22 PM
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2006 E55 AMG
Glad it was something small brotha, better put june 6-8 on your calender, timmayfest
Old 03-23-2013, 09:38 PM
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'12 E63, E55(sold), C32 (sold), '65 Skylark GS 445 convertible, '12 ML350
Well...before that... we're hitting a track.

I NEED 11 sec's on street tires.... (in super shi-hi-tay conditions on my first outing I did 12.01)... So I know I can do it.

I also want to steal your DR's for a run!

Timmay timmay...TIMMAY!!!!!!!

Putting it on my calendar now.
Old 03-24-2013, 01:36 AM
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2015 E63S 4Matic
Good to hear!

I'm actually moving to Atlanta in June of 2014. If I still own my E55 I'll have to make it a point to meet all of y'all
Old 03-24-2013, 06:08 AM
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I believe this issue is one of the reasons ASP came out with their 3 piece pulley set?


Glad you're up and running again!
Old 03-24-2013, 05:36 PM
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think mine broke 2-3 times

its a wear and tear item...a pricey one at that

got the ASP spare now just incase
Old 03-24-2013, 07:19 PM
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i still have a OEM set if anyone wants it
Old 03-24-2013, 08:51 PM
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I changed mine to the ASPs as preventative maintenance and when I took the originals off at 67k miles they were about to let go anyways.

I just noticed the Buick in your profile. I've got a 66 convertible I've had for 15 years and keeps calling at me to re-do, but hasn't gotten any love yet. Roadster Shop's IRS chassis looks awesome but I haven't talked to anyone who got one for feedback.
Old 03-24-2013, 09:20 PM
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2011 CTSV auto, 06 E55 white pano, 87 Grand national, 63 split window
[QUOTE=berti_00;5589664]i still have a OEM set if anyone wants it


Is this the idler pulley set you're mentioning? How much? Might consider it to have it for the next time if they go bad often.

I just changed mine as it was bad when I got the car but how long do they last...approximately?
Old 03-25-2013, 09:51 AM
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W211
get the 3 piece ASP set from Shardul. Less than $300
Old 03-25-2013, 10:06 AM
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Originally Posted by novae500
get the 3 piece ASP set from Shardul. Less than $300
thank you sir
Old 03-26-2013, 12:38 AM
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w205 C63s, w212 E63,w219CLS500-SOLD! w211 E63, 2006 E60 M5 (KABOOM!)
Similar experience, different engine. Had an idler pulley stop spinning on my 156 and the damn belt wiped out my radiator, thermostat housing, one intake tube and puked it's guts all over my driveway. The funniest part was the console telling me to "top off my coolant level". Just glad for warranties.
Old 03-26-2013, 08:10 AM
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2011 CTSV auto, 06 E55 white pano, 87 Grand national, 63 split window
Originally Posted by jaedee
Similar experience, different engine. Had an idler pulley stop spinning on my 156 and the damn belt wiped out my radiator, thermostat housing, one intake tube and puked it's guts all over my driveway. The funniest part was the console telling me to "top off my coolant level". Just glad for warranties.
BERTI 00: This is why no one should ever buy a used idler pulley set...bc this could happen anytime within 100-500 miles of putting it on their car and many of us here have no warranty!

I will give you $10 for it and keep it in my car so that when the next person cuts me off I can throw it on their windshield!
Old 03-26-2013, 09:48 AM
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Originally Posted by 60nomad
BERTI 00: This is why no one should ever buy a used idler pulley set...bc this could happen anytime within 100-500 miles of putting it on their car and many of us here have no warranty!

I will give you $10 for it and keep it in my car so that when the next person cuts me off I can throw it on their windshield!
i wouldnt either and thats why i bought the ASP set from shardul... some people want them to experiment with them or w.e the reason or have projects so to some it doesn't matter... plus my stock oem set ran like new still they turn like new bearings are in or something but i just like the look of the ASP and dont have to worry anymore
Old 03-26-2013, 03:25 PM
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Originally Posted by novae500
get the 3 piece ASP set from Shardul. Less than $300
Agreed. That's what I did. I can be a little over the top, though, so I got the fourth pulley as well. Might as well change all of them.
Old 03-26-2013, 08:57 PM
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2011 CTSV auto, 06 E55 white pano, 87 Grand national, 63 split window
Originally Posted by berti_00
i wouldnt either and thats why i bought the ASP set from shardul... some people want them to experiment with them or w.e the reason or have projects so to some it doesn't matter... plus my stock oem set ran like new still they turn like new bearings are in or something but i just like the look of the ASP and dont have to worry anymore
I understand...I should have consulted you guys here before I bought the OEM set from mercedes but what the heck...it's on and working...for now! lol

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