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pulley install (too much interference?) UPDATE #3014112
02/10/22 05:03 PM
02/10/22 05:03 PM
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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 08:56 AM.
Re: pulley install (too much interference?) [Re: BDW] #3014165
02/10/22 08:45 PM
02/10/22 08:45 PM
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What are you using to install the pulley? Pictures help?

Re: pulley install (too much interference?) [Re: NITROUSN] #3014170
02/10/22 08:59 PM
02/10/22 08:59 PM
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Using a HF pulley install tool, watched a bunch of YouTube videos, seems pretty straightforward.
But this thing will just not seat, wondering if 0.008" is too much to overcome?

Re: pulley install (too much interference?) [Re: BDW] #3014174
02/10/22 09:38 PM
02/10/22 09:38 PM
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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 09:41 PM.

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Re: pulley install (too much interference?) [Re: BDW] #3014183
02/10/22 10:05 PM
02/10/22 10:05 PM
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Call Holley. They may want a tighter fit being an aluminum pulley. Steel would be more like .002. What HF tool are you using?

Re: pulley install (too much interference?) [Re: NITROUSN] #3014185
02/10/22 10:14 PM
02/10/22 10:14 PM
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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.

4ADDD7C7-54F6-418D-8801-D51AECB470D4.png
Last edited by BDW; 02/10/22 10:15 PM.
Re: pulley install (too much interference?) [Re: BDW] #3014186
02/10/22 10:18 PM
02/10/22 10:18 PM
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Here’s where the shaft gouged off the powered coating.
But only on 1 side, as it went on crooked.

487C51BA-CD55-42BC-9BD7-C7F69F004D46.jpeg
Re: pulley install (too much interference?) [Re: BDW] #3014189
02/10/22 10:34 PM
02/10/22 10:34 PM
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Lightly clean the hole. Put a light lube on the shaft and pulley. Start pulling it on and tap it to center it with a rubber mallet as you pull it on. It should center itself.

Re: pulley install (too much interference?) [Re: Chargerfan68] #3014288
02/11/22 11:09 AM
02/11/22 11:09 AM
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Originally Posted by Chargerfan68
.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.


iagree

Re: pulley install (too much interference?) [Re: wingman] #3014355
02/11/22 01:31 PM
02/11/22 01:31 PM
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Originally Posted by wingman
Originally Posted by Chargerfan68
.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.


iagree



i agree as well ! use anti-seize as a lube when you pull this on.
beer

Re: pulley install (too much interference?) [Re: moparx] #3014362
02/11/22 01:45 PM
02/11/22 01:45 PM
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Thx for the replies, I did put some lithium grease on shaft and pulley on initial attempt.
I’ll try to carefully clean up the pulley bore with some 600 grit and give it another go........

Re: pulley install (too much interference?) [Re: BDW] #3014934
02/13/22 08:59 AM
02/13/22 08:59 AM
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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


5FE8B884-3D5B-4367-AAD6-CE19C7334E2B.jpeg635768E3-59B2-4F74-B3C5-0D7AE52FBFF8.jpeg
Last edited by BDW; 02/13/22 09:01 AM.
Re: pulley install (too much interference?) UPDATE [Re: BDW] #3014953
02/13/22 09:42 AM
02/13/22 09:42 AM
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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.


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Re: pulley install (too much interference?) UPDATE [Re: RapidRobert] #3014983
02/13/22 11:10 AM
02/13/22 11:10 AM
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Glad you got it done! Nice!


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Re: pulley install (too much interference?) UPDATE [Re: Chargerfan68] #3014996
02/13/22 11:42 AM
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up up
looks nice as well.
beer

Re: pulley install (too much interference?) [Re: BDW] #3015178
02/13/22 09:10 PM
02/13/22 09:10 PM
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Originally Posted by BDW
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



up Any bets on where this was made ??? whistling stirthepot biggrin

Re: pulley install (too much interference?) [Re: TJP] #3015186
02/13/22 09:42 PM
02/13/22 09:42 PM
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Originally Posted by TJP
Originally Posted by BDW
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



up Any bets on where this was made ??? whistling stirthepot biggrin


At this point in history, I'm not sure where something was made makes much difference. Quality control just doesn't exist many places any more.

Re: pulley install (too much interference?) [Re: poorboy] #3015214
02/14/22 12:11 AM
02/14/22 12:11 AM
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up .004 is Plenty Tight , usually .005 of Rust from a pulley or snowblow something that has had corrosion/ galling results in 5 TONS of EXTRA force on removal or drive force ! . drive snowblow Ronnie snowblow

Re: pulley install (too much interference?) [Re: 1969ronnie] #3015309
02/14/22 10:37 AM
02/14/22 10:37 AM
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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.

Re: pulley install (too much interference?) [Re: Tie Rod Garage] #3015491
02/14/22 06:58 PM
02/14/22 06:58 PM
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It was definitely made in China.
It was on back order from Holley for 4 months. Other than the pulley issue, looks to be very well made.
No idea if it's powder coating or anodized, but that area definitely should have been taped off.
I didn't get all of it off and it was a chore to pull that pulley on.
I hope the pump never goes bad, I'm thinking its not coming back off.

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