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Jaguar s type shaking steering

1.9K views 22 replies 7 participants last post by  mondeao  
#1 ·
My wife's jaguar feels like abs is engaging on the offside whilst driving and as it reaches 50 mph and more the steering wheel shakes quite violently. Offside wheel is hot when vehicle has stopped. Check wheel balancing twice and now think there is an underlying problem. Any ideas?
 
#2 ·
Sound rather like a sticking caliper piston.
 
#3 ·
When you say you've checked the wheel balancing, how many weights are needed to balance it?

I had a problem last year with my Landrover. Once over 50 it shook really badly. Had all 4 wheels balanced and 4 wheel geometry done but nothing really cured it. But it kept bothering me that 2 wheels took far too many weights to balance than I felt a newish car with top brand tyres should.
In the end, I resolved it with a brand new set of Pirellis. The old ones looked fine and passed the checks but clearly 2 of them weren't as round as they should have been. Probably as it had spent most of Covid sat around on them.

My XF was just a bit unpleasant at speed. Lots of vibrations, but very hard to pin down to a speed or scenario. I put it down to age but recently I had a blow out which was caused by a cracked alloy. As it was in the wheel refurb place I asked for all 4 to be checked for cracks and for straightness. Not surprisingly, for a car running 255/35/20's on pot holed roads, all 4 were out of shape. 1 weld, 4 straightens and 2 refurbs later and It's now a different car. Don't think it's ever driven so smoothly.

If the wheels are ok, then I'd be checking the brake disks.
 
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#6 ·
If the wheel is hot, the heat is coming from somewhere. Is that wheel also dirtier?

ABS faults like you mention are very rare but sticking calipers are far, far more common. Jack up that corner and see how free the wheel is especially after a drive when the wheel gets hot.
 
#8 ·
Very unusual for the ABS to pull one brake on. When you think about it, the ABS's job is to reduce braking effort to stop lock ups.
I tend to agree with @Neilr that it will be a sticky caliper, either the piston, or the slider pins making the brake 'drag', and as it get warmer, it will grab more, and get hotter still, then the disc will go out of shape a bit, and cause the judder/shake. When it cools, the disc returns closer to true, and the judder goes away until it gets hot again

Edit, The disc will eventually stay warped if it gets too many heat cycles.
 
#21 ·
Hi there!

Maybe start a new thread about this issue?

Have you noticed any other symptoms - not being able to change temperature anywhere, etc? Check what works and what doesn't.

One common fault is the heater distribution valve which eventually dies. Also the header tanks are prone to prone to cracking.
 
#22 ·
Thank you to the person who suggested that my wife's s type heater problem could be the duel heater solenoid. It took an age to find and then replace but it has sorted the problem. Many thanks also to the person that told me where to look as all my investigations fell to earth with a bang.