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Topic: Fan Clutch

in Forum: C3 Cooling and Heating Systems


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Fan Clutch (1/5)
 2/5/07 6:47pm
longhorn294Lifetime Member
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DeBerry, TX - USA

Vette(s):
1971 383 Stroker- mille miglia red...5 speed


Joined: 2/27/2002
Posts: 1006

 Tried to get a fan clutch today. MAM, Ecklers and The Last Detail techs all said the '71 was unique and none of them have or can get it. Something about the bolt pattern was different. Ecklers recommended getting a 'universal' type from a local parts house with the slotted type holes. Why would '71 be different from '70 or '72Question  Would I be likely encounter balance problems with the slotted type? Anyone with a '71 ever run in to this before Question Confused help me, help me! Wits%20End

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Fan Clutch (2/5)
 2/5/07 8:07pm
Ron 78Lifetime Member
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BINGHAMTON, NY - USA

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Joined: 7/19/2003
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Should'nt be any problem with the slotted one,as long as the center hole is the same size as your water pump shaft Thumbs%20Up

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Fan Clutch (3/5)
 2/5/07 8:40pm
rearn2go72
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Bladenboro, NC - USA

Vette(s):
1972 conv., sunfire yellow, blk interior, blk vinyl and convertible top. Off frame restoration with American Speed 383 stroker engine producing 500hp plus a 200hp NOS system. MSD ignition. Hooker super competition headers with chambered exhaust.


Joined: 1/22/2006
Posts: 1058

Rick's has the clutch for the 71. According to them  71 thru 73 is the same.
Fan Clutch (4/5)
 2/6/07 1:29am
Adams' AppleLifetime Member
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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


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There is a difference in the type of clutch only. They will bolt on, as long as the wp shaft size is the same as the clutch. Chances are, you don't have the original water pump on yer car anyway. I would measure the shaft size, and maybe the bolt circle, and see what will fit. Most wp shafts are 5/8" or 3/4" but some are a bit smaller. Maybe they thought you were looking for a "stock/original" fan clutch?
Ron is right, tho. If the pump shaft and the clutch center is the same size, the slotted bolt-hole type will work fine. It's the shaft it centers on anyway, not the bolts.

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Fan Clutch (5/5)
 2/6/07 1:44am
longhorn294Lifetime Member
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DeBerry, TX - USA

Vette(s):
1971 383 Stroker- mille miglia red...5 speed


Joined: 2/27/2002
Posts: 1006

 Thanks for the info guys. Thumbs%20Up

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   I know the voices aren't real, but they have some pretty cool ideas...

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