Date registered: Sep 2012
Vehicle: 1972 Mercedes Benz 250
Location: Santa Fe, NM U.S.A.
Mentioned: 0 Post(s)
Quoted: 17 Post(s)
(Green Arrow) Loosen this bolt and nut using a wrench/socket at each side
to relieve the tension from the genertor to loosen the drive belt.
(Blue Arrow) there are four 10 mm bolts that should be removed that hold the fan in place.
(Green Arrows) theses are the bolts that hold the water pump to the housing,
there are bolts underneath too.
(Red Arrow) This is the weep hole, apperently this position is INCORRECT, the
weep hole should be to the bottom. (This was done by previous mechanic)
If you are going to replace the fan drive belt with a new one, you will need
to loosen the power steering pump tensioner (green arrow) and remove the
power steering belt also.
The hardest part is to get the fan back onto the pulley, the easiest way for
me was to use my fingers to start one of the bolts into the pully and only get
it in there just enough to grab a few threads,(enough so it doesnt fall out
and also enough to let the fan mount easily slide in there) then rotate the
pulley so that the bolt is at the bottom. Next you can place the fan into
position by sliding the fan mount between the head of the bolt that you
just put in and the pulley. This get the fan really close to the right position,
you might need to rotate it on the one bolt and line up to allow the remaining
three bolts to fit in the threaded holes. You will need some patience here
and some small fingers can also help out. Tighten using the 10 mm wrench. I'm
not sure what torqe should be applied here, but I would recommend checking
them again for tightness after 50 miles or so.
Let us know how it goes.
Last edited by Luna Gaudi's 72 250; 01-19-2014 at 03:20 PM.