1970 LS5 fan clutch
Thread Starter
Intermediate
Joined: Jan 2003
Posts: 36
Likes: 0
From: west chester pa
1970 LS5 fan clutch
Hi guys, I just purchased a Hayden 2713 fan clutch. My fan is stock, to the best of my knowledge (5 blades, unevenly spaced).
I found that the "hub" on the new fan clutch is slightly larger in diameter than the hole in the center of the fan, so the fan won't fit onto the clutch.
Has anyone else experienced this?
The other notable difference is that the replacement clutch has slots for the water pump studs, rather than holes.
Thanks!
I found that the "hub" on the new fan clutch is slightly larger in diameter than the hole in the center of the fan, so the fan won't fit onto the clutch.
Has anyone else experienced this?
The other notable difference is that the replacement clutch has slots for the water pump studs, rather than holes.
Thanks!
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
Go to the Hayden Fan Clutch specification pdf and compare how your old clutch, fan and new clutch compare to the specs. That clutch should fit your fan. Either you have the wrong fan or the clutch was mis-boxed.
Thread Starter
Intermediate
Joined: Jan 2003
Posts: 36
Likes: 0
From: west chester pa
It appears that there are different parts for ac vs non-ac cars, which likely explains my problem.
The Hayden pdf (http://www.haydenauto.com/upload/Hay...n-clutches.pdf) doesn't mention the 2713 part number. But it shows part 215052 for ac cars and part 215065 for non-ac cars.
The dimension in question - the flange diameter - is different for these part numbers (2.58 inches vs 2.59 inches).
I measured my new 2713, and found that the dimension is 2.59. Presumably the old clutch is 2.58 but I can't measure it at the moment.
The Hayden box does indicate part number 2713, and the clutch is stamped with number 271307014.
Thanks again for the help!
The Hayden pdf (http://www.haydenauto.com/upload/Hay...n-clutches.pdf) doesn't mention the 2713 part number. But it shows part 215052 for ac cars and part 215065 for non-ac cars.
The dimension in question - the flange diameter - is different for these part numbers (2.58 inches vs 2.59 inches).
I measured my new 2713, and found that the dimension is 2.59. Presumably the old clutch is 2.58 but I can't measure it at the moment.
The Hayden box does indicate part number 2713, and the clutch is stamped with number 271307014.
Thanks again for the help!
Burning Brakes
Joined: Aug 2008
Posts: 878
Likes: 55
From: Deep South Denmark
Usually an adapter piece / insert comes with the clutch so that it can be used with both pump shaft diameters. Have you looked inside the hole in the clutch? It's usually a thin walled pipe that has been sliced up.
/Karsten
/Karsten
Thread Starter
Intermediate
Joined: Jan 2003
Posts: 36
Likes: 0
From: west chester pa
I didn't even get that far (installing the clutch onto the pump). My issue was that the clutch flange would not fit through the opening in the fan. Thanks -
Drifting
Joined: Aug 1999
Posts: 1,451
Likes: 84
From: Round Rock TX
1970 used small bolt pattern and pilot shaft, and 71 and later used larger bolt pattern and pilot shaft. I have both 70 and 71 pulleys and can show this if needed. I suspect that you got the later fan clutch and you need earlier.
Thread Starter
Intermediate
Joined: Jan 2003
Posts: 36
Likes: 0
From: west chester pa
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