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Topic: Vibration at speed (Read 1609 times) |
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amigafan2003
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Vibration at speed
« on: Nov 2nd, 2013, 7:54pm » |
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Hi All
Took the Cosworth down to Bognor Regis for half term holiday with the kids and she performed flawlessly with over 750 miles being covered in 5 days (two 310 mile trips in one go) - new water pump didn't lose a drop of water  Even returned 31mpg on the way back
However, I did notice there is a vibration through the car which starts off around 65mph and fades out at around 85mph. It isn't felt through the steering wheel but rather in the seat of the pants and up the spine to the neck if that makes sense?
So what do we reckon - go for a wheel/tyre balance first and then move onto something like CV joints at the rear?
I can get full recon driveshafts for £60 a side - are they easy to swap? Scorpio driveshafts are bolt on on each end aren't they?
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Scorpio_Mike
Senior Member
Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Re: Vibration at speed
« Reply #1 on: Nov 2nd, 2013, 9:25pm » |
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Prime suspect, I would say has to be the propshaft bearings or joints.
Rear driveshafts have 6 Torx bolts on each end and can be tricky to get out - impact driver might be useful.
CV joints can be replaced - you don't have to change the complete driveshaft.
Yours will be the 108mm CV joints I think - don't know how much they are but the 100mm joints can be picked up for about £20 each, pretty sure they are the same as on a Sierra.
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD
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Geoff_W
Senior Member
98 Ulti2.5tdi Auto
Posts: 1340
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Re: Vibration at speed
« Reply #2 on: Nov 2nd, 2013, 10:57pm » |
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Guibo joint?
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The winding road goes on and on... or at least it does in Northumberland
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amigafan2003
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Re: Vibration at speed
« Reply #3 on: Nov 3rd, 2013, 11:01am » |
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For the sake of £20 a side I though't it'd just be easier to swap the entire driveshaft rather than faffing with boots, clips and grease!
I've seen the article on changing the center bearing on the prop - I'll give that a go
Thanks all.
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Bikerdon
Full Member
2.0 Ultima saloon, Norton 500, Suzuki 550.
Posts: 129
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Re: Vibration at speed
« Reply #4 on: Nov 3rd, 2013, 11:32am » |
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Pretty sure I've got a brand new propshaft centre bearing somewhere in my pile of parts. Bearing only not the rubber mount, Fiver posted if I can find it.
Update, yep found it! Genuine ford part.
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My other car's a bike!
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Scorpio_Mike
Senior Member
Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Re: Vibration at speed
« Reply #5 on: Nov 3rd, 2013, 12:03pm » |
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on Nov 3rd, 2013, 11:32am, Bikerdon wrote:| Pretty sure I've got a brand new propshaft centre bearing somewhere in my pile of parts. Bearing only not the rubber mount, Fiver posted if I can find it. |
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Normally the rubber bit which fails 
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD
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amigafan2003
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I'm a YaBB newbie!
Posts: 972
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Re: Vibration at speed
« Reply #6 on: Nov 3rd, 2013, 5:07pm » |
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on Nov 3rd, 2013, 11:32am, Bikerdon wrote:Pretty sure I've got a brand new propshaft centre bearing somewhere in my pile of parts. Bearing only not the rubber mount, Fiver posted if I can find it.
Update, yep found it! Genuine ford part. |
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I'll take the bearing! PM me how you'd like payment.
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Bikerdon
Full Member
2.0 Ultima saloon, Norton 500, Suzuki 550.
Posts: 129
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Re: Vibration at speed
« Reply #7 on: Nov 3rd, 2013, 5:25pm » |
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PM sent.
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My other car's a bike!
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scorpio_man
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Ford Kuga awd
Posts: 5654
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Re: Vibration at speed
« Reply #8 on: Nov 3rd, 2013, 6:36pm » |
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hi there
i'd still get the rear wheels/tyres checked for correct balance.
hth
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amigafan2003
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Re: Vibration at speed
« Reply #9 on: Nov 3rd, 2013, 8:47pm » |
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on Nov 3rd, 2013, 6:36pm, scorpio_man wrote:hi there
i'd still get the rear wheels/tyres checked for correct balance.
hth |
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Yeah, I will do Easiest thing to try first
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: Vibration at speed
« Reply #10 on: Nov 5th, 2013, 12:12am » |
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on Nov 3rd, 2013, 6:36pm, scorpio_man wrote:hi there
i'd still get the rear wheels/tyres checked for correct balance.
hth |
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If you feel it through your hands, then it's a front wheel problem.....If you feel it through your bum, then it's a rear wheel problem 
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Mike H
Senior Member
Renault Clio
Posts: 2594
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Re: Vibration at speed
« Reply #11 on: Nov 13th, 2013, 6:32pm » |
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Is this consistent, repeatable, or it only happened on one particular road or type of road, could be the road surface setting up a resonance. That's not to say there isn't an imbalance, but it's being aggravated.
Just FYI the Clio has a security bolt on each wheel so I suspect there is a bit of imbalance, the steering can tremble slightly at around 65 BUT it also depends on the road surface, so is not consistent. There were some bits of the A1 that did this (this weekend) but not much else so far as I can recall now.
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Mike H
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