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#1
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M103 idler pulley replacement
Soon I will be replacing the idler pulley and belt on our M103.....the belt is old and needs replacement, and the pulley has a chunk missing out of it
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-diesel is not just a fuel, its a way of life- ![]() '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#2
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Anyone?
__________________
-diesel is not just a fuel, its a way of life- ![]() '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#3
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If it's the pulley by the air pump, you just remove the plastic cover and take out the hex head bolt and remove and replace.
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#4
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Quote:
Also, is it possible to bypass the air pump pulley by using a different belt? Like a belt for a 1986-89 vehicle that doesn't have the air pump? I noticed in looking up parts that the '89s do not have a air pump and thus have a shorter belt.....they also seem to have a slightly bigger idler pulley....the part is different. If I were to bypass the air pump with a shorter belt (and am also replacing the idler pulley) should I replace it with the older (and seemingly bigger) pulley, or just the one that is on the car now?
__________________
-diesel is not just a fuel, its a way of life- ![]() '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) Last edited by pawoSD; 02-21-2009 at 04:59 PM. |
#5
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Don't know the torque value or the answers to your questions.
But I will say you could just unplug the air pump and then it will essentially be another idler pully. As long as the bearing in the air pump pulley is good you should have no problem. Bearing in air pump can be replaced it bad. That's what I did; replaced air pump pulley bearing. |
#6
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Yeah I am just trying to avoid the air pump altogether....less to fail or worry about. I'm just wondering if its as simple as a shorter belt and possibly the older belt pulley....
Anyone know?
__________________
-diesel is not just a fuel, its a way of life- ![]() '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#7
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Hasn't anyone else done this before?
__________________
-diesel is not just a fuel, its a way of life- ![]() '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
#8
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Check with Hitman; I think he has done it.
I can't find a torque value for the pulley bolt in the manual. Not really critical, maybe about 20 Nm, or a good snug with a 3/8 ratchet handle. Sure, blue Locktite is good insurance. My manual does show an early engine without the pump, and the belt is 2255 mm long (with AC). Of course, that may be with the larger idler pulley you mentioned. DG |
#9
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I did this a long time ago on my old 300E. I don't remember it being terribly difficult, although it might've taken a breaker bar to undo the old pulley. It's a simple bolt on, may 20-30 Nm.
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#10
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Quote:
I've inspected the other items in the belt system and (including the air pump) they all seem to be tight/ok....so I'm just going to swap on a new idler pulley and a normal sized belt for now....I'll double check the bearings on everything when I pull the belt later this week. Now....off to ordering what I need. ![]()
__________________
-diesel is not just a fuel, its a way of life- ![]() '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
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