I have the M104 engine and I was trying to temporary remove the air pump to rebuild it but the belt I got from the dealer (2257mm) is too short and the original one (2415mm) is too long. Does anybody knows the exact lenth ?

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New Addition to the family
2013 Passat TDI 5Miles
2004 E500 4MATIC Wagon 95k
1996 E300 Diesel 173k Sold
1993 300E 2.8 230k Sold
1994 E320 White Wagon 373K Sold
Still dreaming about ....500E


Radu Negru

Might be cheaper to get a junkyard air pump to use temporarily.

Sixto
87 300SDL

A belt cost $18 but an $25 dollars used air pump from Junk yard may be bad so it can seize and create more damages.

__________________
New Addition to the family
2013 Passat TDI 5Miles
2004 E500 4MATIC Wagon 95k
1996 E300 Diesel 173k Sold
1993 300E 2.8 230k Sold
1994 E320 White Wagon 373K Sold
Still dreaming about ....500E


Radu Negru

There was a VIN split at engine # 48696 - but 2415 is the shorter one, 2475 the longer, so something is fishy.

but my junkyard oil cooler could have been bad, and i would have been out $40 on the cooler, and my engine would have been flushed down the toilet. its possible that a junkyard pump *could* be bad, but i've never got a bad part from a junkyard, except for the first oil cooler, that the one fitting was stripped, and the other broke off , atleast it was only $10 the first time, but the stakes went up the second time (hopefully the last) because i needed to get the car out of the lot, and i couldnt do that with a stream on oil , but its fixed now, all thats left is the damage from the wreck!!!

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1982 300D (w123, "Grey Car")
1982 300D (w123, "Blue Car")
2001 Ford F150 "Clifford" (The Big Red Truck)
1997 Dodge Ram 2500 12V Cummins
1996 Dodge Ram 2500 12V Cummins
Previous Vehicles:
1995 E300D, 1980 300SD, 1992 Buick Century, 2005 Saturn Ion