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Thread: Broken AC pulley - do I need a new clutch or just the pulley?

  1. #1

    Default Broken AC pulley - do I need a new clutch or just the pulley?

    The pulley and clutch both have quite some grooves. Can I just buy a new pulley and reuse the old clutch (with the thick vibration damper) or is it wise to use both new?
    Need to import that stuff so I donŽt want to end up having to re-order and wait for weeks.
    Thanks

  2. #2
    Lost and driftin' Arquemann's Avatar
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    What so you mean by "grooves" on the pulley and clutch?
    I'm not aware of a vibration damper. The AC clutch has 3 parts, the magnetic clutch, the pulley and the clutch plate (on the front).
    1985 Mercury Grand Marquis LS, "Maisa"
    2008 BMW 530d Touring, "Femma"

  3. #3

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    Clutch plate has a 3/8" thick rubber on the front. It is rubberized to the metal. Can only think it is sort of a damper they used on the Lincoln to silence the clutch engaging.

    By grooves I mean grooves on the front face of the pulley and the back side of the clutch plate. Looks like it is there to enlarge surface area, but not sure.

    Pics of new clutch packs I see have no grooves but a flat mating surfaces.

  4. #4
    Lost and driftin' Arquemann's Avatar
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    Yours doesn't look like this?
    Click image for larger version. 

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    Anyways, atleast RockAuto doesn't list the clutch pulley separately. EDIT: And you'd most likely need new shims for the clutch.
    Last edited by Arquemann; 06-08-2021 at 12:28 PM.
    1985 Mercury Grand Marquis LS, "Maisa"
    2008 BMW 530d Touring, "Femma"

  5. #5
    I'm an air-conditioned gypsy gadget73's Avatar
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    If you mean there are deep grooves on the face of the pulley, I would replace both pieces. Every time I've seen a deeply worn pulley face, the rear face of the hub part was equally worn. Never tried it, but I would just assume the worn piece would wear the new piece until they fit. Kind of like using new brake pads with a grooved rotor.


    You don't have to replace the coil underneath, but sometimes you can find complete setups with the coil, the pulley, and the clutch disc in one go for cheap. I've even found NOS Motorcraft ones on ebay for not stupid money.

    They don't always come with shims either, and sometimes the shims are hard to find. Last time I needed one, a common washer from the hardware store happened to be the right thickness.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  6. #6

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    Hi gadget73,

    thanks, IŽll get me a complete clutch pack then. Makes more sense.

  7. #7
    I'm an air-conditioned gypsy gadget73's Avatar
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    The worn one on my Mark VII was caused by the rubber bushing in the middle of the clutch face wearing out. That one is a stupid design, instead of the usual metal spring, it uses the rubber as the spring and after 30 odd years it stops being springy. It got to the point where it was constantly rubbing and it just ate itself up. I think this was only used from about 89-92 or so.

    The bad one on my Continental was a different clutch face failure. The older compressor has a rubber hub in the middle of it where the disc actually drives the compressor. The rubber had oozed out, probably from heat and oil leaks. The rubber caught the retaining ring that holds the pulley in place on the front of the compressor and spun that ring until it sawed the front of the compressor off, then the pulley moved forward until it just ground against the clutch face. Had to replace the compressor along with the clutch because of this.

    the one on the Towncar was mostly my fault. I had the belt jump and it sawed through the electrical connector. Eventually it just broke and stopped pulling the clutch in. Changed the whole thing including because I bought a complete kit. The good pulley and clutch face actually are on the Continental now, mated to the original coil on a good, used compressor.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

  8. #8

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    @ Arquemann: No, it has a solid one-piece rubber about 3/8 thick on the hub face where yours has the three.

  9. #9
    all the CFI are belong to me
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    For some photos of the clutch replacement, see this reply within my Lincoln thread: http://www.grandmarq.net/vb/showthre...l=1#post817398

    Current: 83 GM 2dr POTM 10/2019 | 84 TC POTM 1/2017 & 4/2019 | 85 CS | 85 Ranger +trlr | 86 GM | 91 GM POTM 12/2017
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  10. #10

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    Thanks for the hint with the upper rad hose. pulley is off already but coil still on. IŽll maybe change the coil when I do the new rad hoses and coolant flush then in one turn.

  11. #11
    I'm an air-conditioned gypsy gadget73's Avatar
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    The 3 puck clutch is later and many replacements are that style. The older original style looks like the one on Kishy's car. Both work fine, I have swapped from one to the other with no fuss. The 3 puck one is arguably easier to hold since you can jam a screwdriver in it, but with the proper triangular holding tool neither are hard to deal with.

    86 Lincoln Town Car (Galactica).
    5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley

    91 Lincoln Mark VII LSC SE, triple black (Timewarp) - poly front bushings, KYB struts and shocks, Holley SystemMax1 lower intake, SilverFox AOD valve body,

    1984 Lincoln Continental TurboDiesel - rolls coal

    Quote Originally Posted by phayzer5 View Post
    I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers

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