What do you do when you have a noisy serpentine belt tensioner? You replace it with a new one off course! Never skip an opportunity to buy new shiny parts 🙂
I was able to find a Trucktec Automotive tensioner for the m113k engine, which has a steel pulley instead of the known-to-fail plastic pulley. It’s an easy DIY task, the most time is spent on removing parts to get access to the tensioner.
Replaced the Contitech 6K2445 serpentine belt with an original Gates belt and was very surprised to see the actual difference. The ribs of the OE Gates belt are significantly thicker than the Contitech (Continental), something I did not expect to see.
Even though it’s way more expensive than the Contitech (about 70 euro vs 20 euro), I’m happy that I have chosen the Original OE option.
Partnr: 1139970292 6K2449
After a incident in the garage, I had the idea that the crank pulley had a slight wobble. As these pulleys are known to separate (after a long period), I didnt feel comfortable with the car and made the decision to get this replaced.
Off course, its not a cheap item to replace, as this is an AMG specific item (2 belts running of the crank pulley, 1 for the accessory belt (6 ribs) and 1 for the supercharger (8 ribs)).
I went to Mercedes specialist Ralph Eidams in Brunssum where they were able to replace it within the hour, keeping down costs on labour. Even though it probably wasn’t necessary, I ultimately did it for peace of mind. I also let them replace the front main axle seal (krukaskeerring).
Partnr crankshaft pulley: A1130300103
Partnr crankshaft pulley bolt: 0009900200
Partnr front main seal: A0239978447
Ralph Eidams: https://www.ralpheidamsmercedes.nl/
Finally fitted a new serpentine belt tensioner, needed to wait for a Torx T60 bit to be able to take the tension of when you fit the serpentine belt.
