pulley install (too much interference?) UPDATE
#3014112
02/10/22 06:03 PM
02/10/22 06:03 PM
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Joined: May 2005
Posts: 4,707 Florida
BDW
OP
master
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OP
master
Joined: May 2005
Posts: 4,707
Florida
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I have this pulley I'm trying to install. It's a Holley power steering kit for a 3G motor. First attempt was a total failure, wouldn't go on, and then it got cocked and gouged the powder coat on the pulley. I've now measured the power steering shaft (steel) and it's 0.668" and the aluminum pulley is 0.660". Is this normal, or is the powder coat too thick? It's circular, so that's 0.004" around the complete diameter to overcome.
Last edited by BDW; 02/13/22 09:56 AM.
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Re: pulley install (too much interference?)
[Re: BDW]
#3014174
02/10/22 10:38 PM
02/10/22 10:38 PM
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Joined: Oct 2006
Posts: 1,264 New York, USA
Chargerfan68
pro stock
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pro stock
Joined: Oct 2006
Posts: 1,264
New York, USA
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.008” is way too much interference fit. Just for reference, an ATI super damper (harmonic bal) specs at .0008” to crank. In my opinion, there should not be any powdercoat on the inside pulley to shaft surface.
Last edited by Chargerfan68; 02/10/22 10:41 PM.
1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
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Re: pulley install (too much interference?)
[Re: NITROUSN]
#3014185
02/10/22 11:14 PM
02/10/22 11:14 PM
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Joined: May 2005
Posts: 4,707 Florida
BDW
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OP
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Florida
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I’m going to have to hit the inside of the pulley with some sandpaper to clean up the gouge. Just don’t want to take off too much. Here’s the tool, seems simple enough, thread in the stud, then crank down the nut to pull the pump onto the pulley.
Last edited by BDW; 02/10/22 11:15 PM.
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Re: pulley install (too much interference?)
[Re: BDW]
#3014934
02/13/22 09:59 AM
02/13/22 09:59 AM
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Joined: May 2005
Posts: 4,707 Florida
BDW
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OP
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Cleaned off most of the powder coating with a Dremel tool and gave it another go. Inside diameter interference is now ~0.004” It was a mutha to pull on, but it’s done. Appreciate the help
Last edited by BDW; 02/13/22 10:01 AM.
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Re: pulley install (too much interference?) UPDATE
[Re: BDW]
#3014953
02/13/22 10:42 AM
02/13/22 10:42 AM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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You're all done & good but I was thinking of freezing the pump overnight in the freezer & heating the pulley in the oven.
live every 24 hour block of time like it's your last day on earth
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Re: pulley install (too much interference?) UPDATE
[Re: RapidRobert]
#3014983
02/13/22 12:10 PM
02/13/22 12:10 PM
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Joined: Oct 2006
Posts: 1,264 New York, USA
Chargerfan68
pro stock
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pro stock
Joined: Oct 2006
Posts: 1,264
New York, USA
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Glad you got it done! Nice!
1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
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Re: pulley install (too much interference?)
[Re: BDW]
#3015178
02/13/22 10:10 PM
02/13/22 10:10 PM
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Joined: Jan 2003
Posts: 15,304 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,304
Omaha Ne
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Re: pulley install (too much interference?)
[Re: 1969ronnie]
#3015309
02/14/22 11:37 AM
02/14/22 11:37 AM
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Joined: Sep 2021
Posts: 20 SWFL
Tie Rod Garage
member
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member
Joined: Sep 2021
Posts: 20
SWFL
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that finish looks more like anodizing, not powder coating. Normally threaded holes and press fit holes get masked when powder coated. It's typically not necessary when anodizing.
1941 Dodge WC, 493 cid twin turbo FAST XFI 2002 Dakota R/T RC
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