Clutch Fan

So how would that bolt up?
4 bolts, same as a Mopar. But, little room for a box wrench. M-B owners grind the end of a box wrench to barely fit over the head, since an open-ended wrench risks rounding off the head. In my M-B, I bought bolts at Ace w/ larger heads so I can use an open-ended wrench. Of course, a Mopar will be using different SAE bolts, so get ones w/ the largest heads possible (if a choice). Insure the M-B fan will clear everything on the engine. I tried the other way, test-fitting a Mopar fan-clutch to my M-B diesel. While it bolted up fine, the Mopar fan blades would hit the T-stat tube. I recall verifying w/ a vernier that the pilot hole is the same diameter. That must be fairly universal, except some fan clutches come w/ a reducer bushing which you must insert to use on our Mopars. I expect the same pump is used on GM or Ford which has larger pilot shaft on the w.p. BTW, the M-B fan in the photo appears to have aluminum blades. Better to pick a later one w/ nylon blades, as most M-B guys do. Also, some of the thermal clutches lose their silicone fill, especially if not stored vertical in storerooms.