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04-12-2002, 10:16 PM
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#1 |
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Registered User
Join Date: Feb 2001
Location: Hamilton,Texas
Posts: 66
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breaking water pumps?
I am on my 3rd water pump. the first broke the shaft off and the fan went through the rad. the 2nd bent the impeller and the third is on now. I am running a regular fan and clutch w/o a shroud and a 4 inch extention to get the fan close to the rad. any ideas? is it the extention?
------------------ Bulldog in Hamilton, Texas 69 GMC Stepside 406 SBC
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Bulldog in Hamilton, Texas 69 GMC Stepside 350 Voetec SBC |
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04-12-2002, 10:20 PM
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#2 |
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"Ochre Ogre"
Join Date: Apr 2000
Location: Springfield, MN
Posts: 3,558
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My advice is to find yourself a shroud and use a normal length extension. The further the fan blade is away from the bearings, the more stress it will put on the shaft, bearings, and housing.
------------------ 1971 C-10 Suburban 1972 C-10 Suburban 1969 XL Galaxie Fastback 1968 Galaxie 500 Fastback 1974 SCOUT II Montrose, Minnesota
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Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087 |
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04-12-2002, 10:22 PM
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#3 |
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Senior Member
 Join Date: Mar 2001
Location: Cedar Park, TX
Posts: 686
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Most likey its the extension...take it off
and put a shroud on. the clutch doesnt need to be against the rad (with a shroud on). -OR- your fan is badly out of balance, but I would still bet its the extension. ------------------ 71 Chevy C-10 SWB Fleetside WAS:307w/3-on-the-tree NOW:350TBI/700R4/3.73 See it at www.prismnet.com/~grzanich
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71 Chevy C-10 SWB Fleetside RamJet-350/4L60e & Compushift/3.73Posi See it at www.prismnet.com/~grzanich |
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04-12-2002, 10:26 PM
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#4 |
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Registered User
Join Date: Dec 1999
Location: Surrey, B.C. , Canada
Posts: 874
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Well 1st thing to check is make sure your belt pulleys are lined up. If one is out of line you will be putting side forces on it. Also the 4" extension sure adds a lot of leverage to any problems you may have. Definatly reccomend shroud or electric fan.
Check to see how the belt is wearing on the pulleys, if one side is worn out you know you have a pully problem. Good Luck, CoryM ------------------ 1970 heavy duty C-10 fleetside sport truck. Vancouver B.C. Canada http://www.geocities.com/chevroletc1070 "Take up our quarrel with the foe: To you from failing hands we throw The torch; be yours to hold it high." Lieutenant Colonel John McCrae, Canadian Army
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1970 heavy duty C-10 fleetside sport truck. Vancouver B.C. Canada http://www.geocities.com/chevroletc1070 "Take up our quarrel with the foe: To you from failing hands we throw The torch; be yours to hold it high." Lieutenant Colonel John McCrae, Canadian Army |
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04-12-2002, 11:37 PM
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#5 |
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Registered User
Join Date: Aug 2001
Location: rock island,il,usa
Posts: 5,382
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I bet on the 4" spacer being the problem.....I saw the hub come off a setup like that once @ 6500 rpms(well heard it come off!). it wasnt a pretty sight,not much left of the radiator........69
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http://community.webshots.com/user/hotrodhorn |
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04-13-2002, 12:32 AM
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#6 |
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Registered User
Join Date: Jun 2001
Location: Springfield, MO
Posts: 1,098
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Take the extension off. Get a shroud. Do it right. : )
------------------ Nick Rodenberg Wellington, MO http://nickrod.port5.com You can click on "My 72 Chevy Truck" I have a 72 Cheyenne 10 with a V8 350 and a TH-350 auto-tranny. White/Ochre/White Runs well... working on body. Hoping to have completed in March when I turn 16
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Nick Rodenberg 72 Cheyenne 10 V8 350/TH350 white/ochre/white/ochre, ochre/saddle interior Retired and in the dry... still runs. I now drive Red '01 Ford Focus... better MPG!!! |
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04-13-2002, 07:42 AM
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#7 |
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Whisky Bent & Hell Bound
Join Date: Apr 2001
Location: Chula Vista, CA
Posts: 430
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A fan shroud sure would be cheaper than another new rad
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68 custom stepside PS,PB 350 with Vortec Heads,Carter 650, Edelbrock Performer,HEI, Crane Enegizer 266, Headmen headers 40 series Flowmasters, B&M hole shot 2,000 rmp stall, TCI TH350 Streetfighter, 4.10 gears 2003 Harley Davidson 883C San Diego, CA by way of Houston, TX |
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04-13-2002, 08:45 AM
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#8 |
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Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,709
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You have a serious out of balance problem, obviously. The spacer is the place to start, junk it. Your fan may be bent as well so you might think about replacing it and its clutch as well even though they are $.
------------------ 70 GMC 3/4 ton Sierra Grande 402/TH400 72 Jimmy 4WD 4spd 4" & 35's 64 Corvette Coupe 68 Camaro 'vert TPI & TH700 69 Z/28 355 12.6's @110 72 Datsun 240Z-ol' reliable
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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