hi all,

I really had no warning this was going to happen, the bolt just snapped after a mile of driving fom my house (I need to drill out the thread which is left)

I need a new bolt and pulley, am I missing any other parts as this is all I could find at the bottom of the engine bay?

I hope ASP can sort me out, does anyone know what the crack is with the bolt breaking?

 

That's all of it.

 

A bearing siezing could cause that kind of collapse

 

thanks.............. it not a great design having a plastic pulley, I dont see why I cant use another cheap ebay idler pulley like this will I wait for the ASP one.

http://cgi.ebay.co.uk/Mercedes-Idler...item1c0a80efc0

 

thanks

I checked both bearings, the inside pulley bearing is perfect, the outside pulley bearing has a fair amount of play but turns freely?

I just want to avoid this from happening again. I had driven the car all day and not heard any noises/grinding etc........ the worn bearing vibrating, caused metal fatigue and the bolt gave after time maybe?

I might try and fabricate a support bracket.

 

I just realise the pulley I need to replace is the 6 ribbed accessory plastic pulley.

I dont think ASP will supply this.

Does anyone no the part number of a pulley I can use, is the W210 E55 the same?

cheers

 

I searched aimlessly for a replacement plastic pulley, no luck. If you happen to find one, please let me know.

The issue I came across was the plastic pulley was/is only being sold in a package with the SC idler with pricing ranging from 250-500

 

i had this same problem. i broke my inner double idler (plastic ribbed) pulley and i am fairly certain the just finished there first batch of these in aluminum. call them. they have been prototyping this for a month and it is now in production i think. otherwise someone here on the board has a spare (or at least they did when i needed it).

 

thanks pun1sh3rz,

the original pulley is 90mm ext DIA and 17mm int DIA, I have found/sourced from a local AC DELCO supplier a 6 ribbed pulley which is almost identical, so I have ordered for £16.

http://www.gates.com/oreilly/PDFs/PulleyIndex.pdf



Now I have to work out have to take the front engine plate/braket off that holds the other pulleys,alternator,waterpump etc so I can drill out the broken of bolt thread.


OOH and what do you know....... MB doesnt seem to be able to supply me a new bolt as it comes with the idler pulley kit ...........£270

 

cheers that sounds like good news.

I have e-mailed them,,,,,,,,,,, so I will what for a response and order one also if its availible.

 

I would be cautious going with this plan

 

I had all those pulley`s made by ASP and bbeen running the them for at least 4K miles.. Very quiet, smooth and no problems at all..


I bet your bolt broke from the heat caused by the outer pulley being worn out.. Now that it is getting hot, I bet we see more stock idler pulley`s fail soon..

 

thanks.........the outer metal pulley bearing had no play, the inside one did.

The Plastic pulley I sourced is spot on, I cant belive that MB would not sell me the bolt separately as it only comes with the idler as a full set, typical!

the gap between the two pulleys was very tight and they were almost touching so I have used a 2mm steel washer to keep them apart and not vibrate against each other which might have been the cause of the bolt breaking due to metal fatigue.

also I dont see why it would not be possible or what the issue would be, to have a solid double pulley machined to fit......... both belts spin a the same rate.............do the not?

 

Bringing this post back from the past. £ C43 £ AMG £ How did the GATES pulley work?
I replaced my accessory belt, as the car was idling the plastic accessory pulley broke tearing apart the new belt. I think the 90,000 miles of engine heat and extra tension the new belt has caused the pulley to disintegrate.

Is there a better way to fix this then spending $400 at stealership? I found many listings on Ebay that appear to sell the plastic accessory pulley only.

 

This happened to me as well. I replaced the plastic part with a DAYCO 89130 for $25. This part is verified and fits perfectly. http://www.ebay.com/itm/390913099113?_trksid=p2059210.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT
Now about that bolt.. Does anyone have a source for this? What did you end up going with. I know this thread is pretty old but I'm hoping to get some feedback from someone.

 

Bolt size for the double idler assembly, is a M10 x 1.5 x 100mm.

 

Thank you x1000

 

So, we are talking about that double idler pulley at the top left of the engine, when standing in front of it.
Mine looks metal alike, i thought it was already an upgraded version

 

can this be bought in the uk...?

 

I have an extra one I can ship to you if not.