For the '91 there will be a few differences, and a few tips. These are for the m103 engine - I think the '91 124 still used that engine??

- The front radiator shroud (plastic) is held in place with two metal clips, just pull them off. Release the rear shroud first by rotating, then release and remove the front shroud upward, then remove the rear one.

- The fan can be removed with an 8mm or 5/16 allen - if you lock the pulley down with the little "fan bearing bracket holding tool". Do a search herein for the "L" shaped coathanger-looking tool and how to use it. You can easily make one. Really helps.

- yours will have a big 'ol bolt right in the center of the tensioner body, and I'll bet it takes an 18mm socket rather than an allen. Very hard to see, keep looking.

- Loosen the big bolt a bit, then turn the 13mm cap on the tensioner adjusting rod CCW to loosen it. It does have left threads, but loosens and tightens the belt lefty-loosey - righty-tighty like a normal bolt. Plays with your brain.

- The brace over the front of the tensioner body runs over to the fan bearing bracket and bolts on to the lower left bolt there. When replacing that bolt, you MUST clean it up and apply gasket sealer to it - it goes into the timing cover and will leak oil.

- Adjust the "righty-tighty" cap on the adjuster rod before final tightening the big 18mm center bolt. Be sure to get that tensioner rod on the back of the tensioner correctly - it can be put on wrong. Look it over closely.

- set the pointer arrow on the tensioner to zero when everything is in place - it just clicks around.

Everything else is pretty intuitive. Good instructions above, also probably a pictorial in the archives somewhere.

DG