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Thread: Strange noises...

  1. #1
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    Strange noises...

    As the weather has improved I've been driving around in my 2006 XK with the windows open for a few days, and I've noticed two slightly worrying noises.

    The first is a very slight brake squeal like noise when crawling in traffic... I would assume that this is the brakes, but it stops when I put very slight pressure on the brake pedal. Could this be a slight brake binding or maybe the start of a wheel bearing problem?

    The second noise sounds like an exhaust bracket rattle when pulling away, but I can't replicate the rattle when revving the engine on my drive, its only audible when pulling away. Could this be something to do with an exhaust valve or similar?

    Does anyone have any experience of either of these?

    Any guidance would be greatly appreciated

    John

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    Senior Member Peterv's Avatar
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    I'd say the brakes need some cleaning an greasing!
    As for the exhaust, it could be an exhaust valve or heat shield. Crawl under and feel if anything is loose. You could try and knock on the exhaust system with an hammer, sometimes it will tell you where the sound comes from.
    There is no substitute for cubic inches!

    Jaguar XK 4.2 2006

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    Senior Member 8bit's Avatar
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    As Peter says, squealing brakes often just need a bit of copper grease on the back of the pads (not the friction faces!) and on the caliper carriers where the pad sits. If you're DIY'ing that then you'll have the chance to inspect for worn pads and potentially sticky calipers or sliders.

    Again to expand on Peter's point, there's a heatshield above the rear silencer under the boot floor. It's made of thin aluminium which tends to disintegrate around the holes that the threaded studs pass through and comes loose. Mine was missing completely when I got the car, it was picked up on a dealer health check when the car was in for service. I ran it like that for a few years without any issue and only fitted a new heatshield when I was installing an upgraded rear silencer anyway. If yours is still there but is coming away around the attaching studs then you could just get some repair washers from B&W and use them between the the nuts and the heatshield to hold the shield back in place.
    Current: 2009 XKR 5.0
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    Senior Member Shmee's Avatar
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    I get this squeaking occasionally, drove me nuts until I put 2+2 together and realised it was always after driving slowly over a section of road that had been top dressed to hide the potholes. Always the rears for some odd reason, a good clean out sorts it, as has been said.
    2007 XKR Convertible , Zircon Blue, Ivory leather.

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    Many thanks for your suggestions gents.... I'll grease the brakes and take a look at the heat shield

    Cheers
    John

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    The saga continues.... this afternoon I jacked her up and clambered underneath with my trusty rubber mallet in hand!
    I checked all the heat shield attachments, they all seemed solid with the heat shields securely fastened.

    The only rattle i could find was coming from the small cylindrical protrusion on the passenger side of the back box. The identical cylinder on the drivers side of the back box was not making any noise.

    Could this be my problem?

  8. #7
    Senior Member 8bit's Avatar
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    Could well be, can you secure it with cable ties or tape of some sort?
    Current: 2009 XKR 5.0
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    Quote Originally Posted by 8bit View Post
    Could well be, can you secure it with cable ties or tape of some sort?
    I don't think so 8bit, the rattle sounded internal, the unit appears to be solid on the side of the back box.

    I was thinking of taking it to the local exhaust specialist to see what they can do!

  10. #9
    Senior Member 8bit's Avatar
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    In that case, time to treat yourself to a nice new upgraded back box I have the Elite RR one from Elite and Performance Jags in Derby (they do mail order), I was £820 for that plus delivery, you'd need to change the rear trim section that sits between the exit pipes to an XKR part for it to fit but that's not expensive I don't think. Alternatively you could probably source an XKR back section on eBay etc. for a lot less, you'd get a moderate increase in sound and tone for a smaller outlay, you'd still need the rear trim section as well though.
    Current: 2009 XKR 5.0
    Previous: 2008 XKR 4.2

    I take photos of cars! Find me on Facebook, Instagram and Flickr.

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