Mercedes AMG m156 | WEISTEC Billet idler Pulleys install | 63 AMG

[@AMG5PT4]

I also bought that M156 pulley kit from Weistec. Weistec went to all the trouble of making quality billet aluminum pulleys to replace the plastic pulleys MB sells, but they inexplicably use low grade bearings in the billet pulleys. I had one bearing fail within a year of installation and a 2nd bearing fail 2.5 years after installation. Totally crap bearings! Both failures resulted in shredded belts ($80/ea) one tow charge, shop charge to change the failed pulley. The 2nd failed pulley was on a Sunday and I was forced to get a used pulley from a shop and install the pulley on the side of the road. Buyer Beware! Stock MB pulleys may be plastic, but they last years - Weistec pulleys don't do much good if the bearings fail soon after installation.

[@glasser2819]

I bet the difference is plastic shield bearings from heat and aluminum transfers heat to bearings !!

[@rezzo_6fn659]

So true. Piece of junk and I can’t believe I paid that much money for that mess. I’ve stayed away from anything weistec ever since.

[@derekhead7068]

At 7:25 into the video, the hose with the fabric type sheath over it and the silver metal pipe running next to it, what do those two go to?

[@centerbuilder7677]

I got to the serpentine belt. There’s no room. Is it easy to remove the fan stroud?

[@trevormyers3114]

Great vid, nobody else includes the clips on the bottom of the fan shroud. Do you happen to remember the size of the bolt on the idler pulley on the top passenger side above the alternator? It’s like a torx bolt and I don’t know what type of socket to even look for lmao

[@akautosport]

I don't recall the size

[@glasser2819]

perfectly great video explanations 👍

[@bernardwarr4187]

Great info, many thanks

[@Subzero2698]

Great video - thanks very much for sharing. What year was the vehicle you were working on? Fun fact - according to the EPC, the bottom right pulley that you talk about @4.45 is a ribbed one until engine number 60057841, which is 11/02/2009, with part number 1562020619. After engine number 60057841 it is a smooth pulley which is the same as the other smooth one (1562020819). No idea why MB decided to change the pulley from ribbed to smooth, but just FYI of anyone reading!

[@akautosport]

This was a 2012

[@FaizAlshehri]

Sometimes a manufacturer revises parts due to supply shortage, cost, or changing of a supplier all together. Or the engineers at Affalterbach found out that the smooth pulley perfomed better.

[@jaseh7823]

@Subzero2698 is correct. W204 2008 C63 unmolested application here consists of two ribbed idler pulleys. Only ribbed idler pulley after 2009 is directly above the alternator on the M156.

[@JohnSmith-bn7bl]

thanks for the video. ill be getting these billet idler pulleys, nice upgrade. you mentioned the weistec transmission pan.. did u put that in, and is it a worthwhile upgrade?>

[@joelsalinassolo7318]

I got a service repair manual for my C63

[@DhanpreetGillRealestate]

How hard is it to do, do you think a beginner can do this

[@akautosport]

As long as they understand everything involved, I don't see why not

[@lanceisaboss9955]

Where did you get the pulleys from?

[@akautosport]

The pulleys were supplied by the customer. The manufacturer is Weistec.

[@onyx0076]

I though the torque specs is 35NM which is 25ft lbs. How you put 13 ft lbs ?

[@amtajbajwa2521]

What is the point of upgradung

[@zr0-000]

the oem pulleys are plastic and are susceptible to high heat (think supercharging) therefore tend to dry rot over time. aftermarket pulleys are made from billet aluminum which are more durable. billet pulleys are recommended when supercharging, but not necessary. i’ve read the oem pulleys are good enough (mbworld forum), but i cannot confirm. vrp sell the set for $530.

[@blue89538]

J H does it affect acceleration?

[@tonyj5408]

whats the advantage of these billet pulley over stock??? i have the same motor m156 in cl63 , I'm thinking about doing this if there's a huge advantage but I don't understand why

[@kevhauser]

Can replace the bearing without the pulley. ALso, the billet will likely never break in case the serpentine belt breaks.