Idler pulleys blew
#1
Junior Member
Thread Starter
Idler pulleys blew
Hey guys... 109000kms and the idler water pump pulleys seized and blew the belt!! No other damage thank God... thinking I'm gonna go with weistec pulley kit for the M156!!! Does anyone know what the 5 pulleys are for? Gonna replace the belt tensioner at this point too... any input guys would be great...
#2
MBWorld Fanatic!
Message shardul. He has billet pulleys in stock. Much cheaper than weistec. I have the weistec and wish I had gotten the other ones based on the price difference.
#3
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#8
Junior Member
Thread Starter
Just a update. Got my UPD pulleys installed! With a machinist background in aerospace, I must say the machining on the pulleys is good... bearings arnt IMO the best and probably wont make the same milage as the OEM ones at 60k miles or 100k kms.... JMO!!! I was told to reuse all the OEM hardware except for the steel caps/covers, however my 09 has the lower #7 idler pulley, OEM was grooved so I replaced with grooved, UPD kit typically come with a smooth pulley but I feel it will cause premature belt wear as the grooves of the belt would be running on the smooth pulley between the crank and A/C compressor, and this pulley can not use the OEM bolt as it has no shoulder for the bearing ID (inside diameter) so as posted in other threads Merc part # 0009902906 is required for the updated bolt.... cost for the bolt $12 CAD.... all in all nice look just sucks there almost impossible to see once all the plastics are back on... longevity of the bearings TBD....
Last edited by EMTHED; 01-17-2019 at 08:39 AM.
#9
Just a update. Got my UPD pulleys installed! With a machinist background in aerospace, I must say the machining on the pulleys is good... bearings arnt IMO the best and probably wont make the same milage as the OEM ones at 60k miles or 100k kms.... JMO!!! I was told to reuse all the OEM hardware except for the steel caps/covers, however my 09 has the lower #7 idler pulley, OEM was grooved so I replaced with grooved, UPD kit typically come with a smooth pulley but I feel it will cause premature belt wear as the grooves of the belt would be running on the smooth pulley between the crank and A/C compressor, and this pulley can not use the OEM bolt as it has no shoulder for the bearing ID (inside diameter) so as posted in other threads Merc part # 0009902906 is required for the updated bolt.... cost for the bolt $12 CAD.... all in all nice look just sucks there almost impossible to see once all the plastics are back on... longevity of the bearings TBD....
You mentioned this "Merc part # 0009902906 " is needed for the installation? Is this mandatory? What is for?
#11
#12
Junior Member
Thread Starter
This post shows all the pulleys
M156 Billet Ider Pulley Kits in Stock - Page 2 - MBWorld.org Forums https://mbworld.org/forums/c63-amg-w204/587288-m156-billet-ider-pulley-kits-stock-2.html
M156 Billet Ider Pulley Kits in Stock - Page 2 - MBWorld.org Forums https://mbworld.org/forums/c63-amg-w204/587288-m156-billet-ider-pulley-kits-stock-2.html
#13
Junior Member
Thread Starter
Heres a few pics... left one is OEM plastic pulley bolt.. right one is the merc part # as mentioned with the shoulder to match ID of bearing. Also added pic of the bolts in the pulley to clarify bottom pic shows OEM (plastic pulley) bolt not in contact with ID of bearing .. Hope this helps
#16
Member
Just a update. Got my UPD pulleys installed! With a machinist background in aerospace, I must say the machining on the pulleys is good... bearings arnt IMO the best and probably wont make the same milage as the OEM ones at 60k miles or 100k kms.... JMO!!! I was told to reuse all the OEM hardware except for the steel caps/covers, however my 09 has the lower #7 idler pulley, OEM was grooved so I replaced with grooved, UPD kit typically come with a smooth pulley but I feel it will cause premature belt wear as the grooves of the belt would be running on the smooth pulley between the crank and A/C compressor, and this pulley can not use the OEM bolt as it has no shoulder for the bearing ID (inside diameter) so as posted in other threads Merc part # 0009902906 is required for the updated bolt.... cost for the bolt $12 CAD.... all in all nice look just sucks there almost impossible to see once all the plastics are back on... longevity of the bearings TBD....