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Thread: Rear hub bearing, spacer question

  1. #1
    Senior Member No Quarter's Avatar
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    Rear hub bearing, spacer question

    Strange, cant find anything about this on this forum, if it's there, please point me in the right direction.

    I'm changing rear bearings on my 1985 XJ6. The Service Manual says to have 0.001"-0.003 end float. Before dismantling I had zero gap, maybe that's what killed the bearings. I've now put in new bearings and used the spacer I had. Still no gap at all. So I need a thicker spacer to create that gap. But in the manual the spacers jump 0.003, which is more than the range needed (0.003-0.001=0.002). So how can one be sure to get it in the range when spacers jump too much in size? Haynes is procedure wise like the Service Manual, but says 0.002 to 0.006, dobule what the Service Manual says.

    So I started to google, always dangerous, and found pages that recommend preload to gap range, with no gap perfect. Totally different.

    I'd like to go with the service manual, but don't understand it. Anybody here done this job?
    2007 Jaguar XKR Convertible
    1985 Jaguar XJ6
    1978 DeTomaso Longchamp
    2009 Cadillac CTS-V 650HP
    Author of Tuning Made Easy:
    http://www.amazon.com/Tuning-M...l-Hass/dp/8771144625

  2. #2
    Senior Member rchiv's Avatar
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    Hi not quite sure if I am reading you correctly. If you to have Zero space you need to reduce the thickness of the spacer to achieve the specified end float. Not increase it. Remove the spacer and check the end float and then see what is needed to reduce it.

    Roger
    HEY I THOUGHT I HAD RETIRED, Ex Auto Electrician
    2006 X Type 2.2d SE Manual Estate. Zircon Blue Champagne/Mocca, F/R Parking sensors, ,Auto Lights, Auto Wipers, Headlight Washers, Sat Nav 2012 update, 17 in Wheels, 120K Mods:- Electric Autofold Mirrors on Locking
    Simple Autofold Mirrors on Locking,http://www.jaguarforum.com/showthrea...irrors+locking
    UPDATE YOUR SIGNATURE http://www.jaguarforum.com/showthread.php?t=91945

  3. #3
    Senior Member No Quarter's Avatar
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    Quote Originally Posted by rchiv View Post
    Hi not quite sure if I am reading you correctly. If you to have Zero space you need to reduce the thickness of the spacer to achieve the specified end float. Not increase it. Remove the spacer and check the end float and then see what is needed to reduce it.

    Roger
    Roger thanks for input. With all due respect, have you done this procedure yourself? The spacer doesn't press on the bearing, it presses on the fixture surrounding the bearings, so that a thicker spacer gives more space for the bearings=end-float.

    Anybody that has done this themselves?
    2007 Jaguar XKR Convertible
    1985 Jaguar XJ6
    1978 DeTomaso Longchamp
    2009 Cadillac CTS-V 650HP
    Author of Tuning Made Easy:
    http://www.amazon.com/Tuning-M...l-Hass/dp/8771144625

  4. #4
    Senior Member rchiv's Avatar
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    Hi, No I have not done this procedure but was looking at the workshop manual. It does not say how to increase the end float only how to decrease it so will have to see if anyone else can advise. Sorry.

    Roger
    HEY I THOUGHT I HAD RETIRED, Ex Auto Electrician
    2006 X Type 2.2d SE Manual Estate. Zircon Blue Champagne/Mocca, F/R Parking sensors, ,Auto Lights, Auto Wipers, Headlight Washers, Sat Nav 2012 update, 17 in Wheels, 120K Mods:- Electric Autofold Mirrors on Locking
    Simple Autofold Mirrors on Locking,http://www.jaguarforum.com/showthrea...irrors+locking
    UPDATE YOUR SIGNATURE http://www.jaguarforum.com/showthread.php?t=91945

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