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#1
11-17-2005, 01:53 PM
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Really frustrated! - Trying to remove water pump
What should have been a straightforward, relatively easy job (and probably is for most people) has turned into a mess! I can not get the four small bolts loose that attach the fan assembly to the water pump - one is loose the other 3 are ridiculously tight and are now rounded off. I couldn't get the closed end of a box wrench on the bolt heads - no clearance. I've tried some needle nose vise grips but they just slide.
I've thought about trying to cut the bolts, or even through the water pump or the water pump shaft, but I don't think/know if I have the room. Is there a way to remove the fan and fan clutch from the shaft? That way I could at least get to the 4 botls head on. Any other suggestions? BTW, 1972 250. Thanks, ryan
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RG Newell 1984 300D 1972 250 1986 560SL 1991 300CE 
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#2
11-17-2005, 02:02 PM
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Dremil tool to cut the heads off?
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Proud owner of .... 1971 280SE W108 1979 300SD W116 1983 300D W123 1975 Ironhead Sportster chopper 1987 GMC 3/4 ton 4X4 Diesel 1989 Honda Civic (Heavily modified) --------------------- Section 609 MVAC Certified --------------------- "He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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#3
11-17-2005, 02:12 PM
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Go buy a cheap, or expensinve, box wrench. Grind the end of the closed end box wrench so that it will fit over the bolt. Your thining the wall of the wrench so it will fit between the bolt and fan hub.This will be your fan box wrench.
Since you rounded the bolt heads. You only did it on the flats you were trying to use. If you grind the box end so the wall is thin. You wil be able to grab the non rounded points and remove the bolts. The rounded over points may have to be smoothed so the wrench can fit over the bolthead. Dave
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1970 220D, owned 1980-1990 1980 240D, owned 1990-1992 1982 300TD, owned 1992-1993 1986 300SDL, owned 1993-2004 1999 E300, owned 1999-2003 1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD 1988 560SL, 100,000mi, owned since 1995 1965 Mustang Fastback Mileage Unknown(My sons) 1983 240D, 176,000mi (My daughers) owned since 2004 2007 Honda Accord EX-L I4 auto, the new daily driver 1985 300D 264,000mi Son's new daily driver.(sold) 2008 Hyundai Tiberon. Daughters new car
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#4
11-17-2005, 06:52 PM
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I soaked em in lock ease and then put the ol vice grips to them , they came off
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Ron 2015 Porsche Cayman - Elizabeth 2011 Porsche Cayman - Bond,James Bond Sadly MERCEDESLESS - ALways LOOKING ! 99 E320 THE Queen Mary - SOLD 62 220b - Dolly - Finally my Finny! Sadly SOLD 72 450SL, Pearl-SOLD  16 F350 6.7 Diesel -THOR 19 BMW X5 - Heaven on Wheels 14 38HP John Deere 3038E Tractor -Mean Green 84 300SD, Benjamin -SOLD 71 220 - W115-Libby ( my first love) -SOLD 73 280 - W114 "Organspende" Rest in Peace 81 380 SL - Rest in Peace
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#5
11-17-2005, 11:20 PM
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A big thanks to Dave (dmorrison)!
Your suggestion worked perfectly and I was able to complete the job tonight w/o too much more trouble. Got everything back together - no leaks (at least so far). Appreciate the help! ryan
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RG Newell 1984 300D 1972 250 1986 560SL 1991 300CE
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#6
11-17-2005, 11:38 PM
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I wonder who put low quality bolts on. MB bolts are hella tough.
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Regards Warren Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL ENTER > = (HP RPN) Not part of the in-crowd since 1952.
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#7
11-18-2005, 12:52 AM
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Quote:
Since the majority of people, myself included, usually use the open end of the wrench. It's common to round them off. I finally ground one of my cheap wrenches down. If I could just get a Gear Wrench ground down to fit. The 5 degree ratchet mechanism would really help. rgnprof I hope you installed new bolts. Since the old ones were rounded off. Think about the future jobs that will require removing the fan. Dave
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1970 220D, owned 1980-1990 1980 240D, owned 1990-1992 1982 300TD, owned 1992-1993 1986 300SDL, owned 1993-2004 1999 E300, owned 1999-2003 1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD 1988 560SL, 100,000mi, owned since 1995 1965 Mustang Fastback Mileage Unknown(My sons) 1983 240D, 176,000mi (My daughers) owned since 2004 2007 Honda Accord EX-L I4 auto, the new daily driver 1985 300D 264,000mi Son's new daily driver.(sold) 2008 Hyundai Tiberon. Daughters new car
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#8
11-18-2005, 11:51 PM
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Actually, only one bolt was rounded and it came off pretty easy with the closed end - they were just really tight and I was being careful NOT to round them off.
Anyway... everything is back together with no leaks, but one question - the car is running a little hotter than before. It looks like around 185 - 195. Before, it got a little cooler while I was driving and the gauge would creep up some while idling - doesn't really do that now. Stays pretty much halfway between the 175 line and the next line - clearly not overheating, but just wondering why it might be a little hotter now?? Maybe, new water pump not circulating as much (Geba, Made in Germany)? I also replaced the thermostat but with the same temp setting. Ryan
__________________
RG Newell 1984 300D 1972 250 1986 560SL 1991 300CE
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