1996 Northstar A/C clutch overhaul

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Cadillac Tech Tips - How to fix it Discussion, 1996 Northstar A/C clutch overhaul in Item Specific Cadillac Discussion; ok, now here's the little write up on how to change a hd-6 clutch coil, result from having that work ...
  1. #1
    el_dorado_mex's Avatar
    el_dorado_mex is offline Cadillac Owners Fanatic
    Automobile(s): 1996 El Dorado and 1991 Cheyenne Pickup
    Join Date
    Jul 2012
    Puerto Escondido, Mexico

    Re: Vacuum & other things - 1996 Eldorado

    ok, now here's the little write up on how to change a hd-6 clutch coil, result from having that work done on a 96 eldo:

    tools you'll need:
    • clutch removal and installation tool (metric), az # mt1115
    • 6" puller, generic
    • 13/16" socket, short
    • standard tools, including punch (flat end)

    the removal and install tool:

    let's get started:
    • take off accessory belt
    • jack up the car
    • remove rf wheel
    • remove splash guards

    • screw the clutch removal tool into the clutch center thread, as far as you can go

    • screw the center part of the removal tool into the outer part until it touches the compressor shaft
    • hold the outer part and screw in the center part with a 19mm wrench until the clutch can be removed

    • remove clutch, be careful not to drop the shaft key (in my case it wasn't there)

    • take out the clip that holds the pulley in place

    • using the 13/16" nut, pull off the pulley with the generic puller, don't pull it against the compressor shaft, you'll damage it

    remark: the pulley doesn't sit on the compressor very tight, you may be able to get it off by hand

    now you can see the clutch coil (and in this case the reason for the job, broken connector):

    • pry off the coil as far as necessary with a screwdriver (or two), until you may use the puller for the rest, the reason is that the coil sits pretty close to the compressor and leaves no space to put on the puller completely

    • clean the area
    • mount the new coil using the punch and a soft hammer, this may take some time and effort, take care of putting the coil on evenly and till it's completely seated (check that the connector is placed within one of the two possible gaps or you may damage it). also don't hammer on the plastic part, just on the metal ring

    • put the pulley back on, this can be done by hand
    • check that it turns freely, if it doesn't, take it off and check that the coil is seated correctly
    • mount back the clip and make sure it sits tight in the groove

    • put the clutch back on and turn the removal tool around to make it an install tool
    • pull the clutch towards the pulley using the bearing that comes with the removal/install tool by pulling against the compressor shaft thread (i guess the next picture explains it better than my words)

    • leave a gap between clutch and pulley of between 0.020 to 0.030, using a feeler gage
    • plug in the coil
    • put the accessory belt back on
    • check for proper functioning and if it works fine mount back splash guards and wheel
    • lower the car and tighten the wheel nuts to spec

    you just saved yourself a couple of bucks, congratulations!

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  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, chrome it
    Automobile(s): 2002.5 F55 STS - 67,500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    MD Eastern Shore, Kent Island

    1996 Northstar A/C clutch overhaul

    Post copied from Seville/Eldorado - Thanks.

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