Vibration through steering wheel
Discussion
Hello,
I have a little problem I hope you can offer some advice on, I'm getting shaking in the Marlin above 60mph, at 70mph heavy shaking in the wheel (almost too hard to hold) and above that it's back to shaking the car. It's meaning I can't really travel any faster than 60mph anywhere (no real trouble as I don't do to many motorway miles) but it's worrying me that it is occuring.
I'd assumed it was wheel balancing (started when I replaced the tie-rod bushes & had a puncture repaired) so had the wheels balanced to infinity and then balanced on the car as well. Didn't help. I also replaced a tie-rod as I'd stripped a thread on a bolt.
I've got Wolfrace wheels and the bubs have mini type studs on them with bolts. One of the front wheels, (one hole) has a slight ovaling to it and a lip inside, but nothing too bad. I did break a washer so now have a much thicker spring washer on.
I've swopped the wheels and placed the nuts on the other wheel (i.e. swopped the wheels only) on the front and that hasn't helped.
I've checked both wheel bearings (jacked the car up, let the suspension rest on blocks and wobbled the wheel vertically) and there is no play.
I haven't checked the steering rack (as I don't how to yet) but all suspension components look in good condition and have recently been replaced AFAIK.
What else can I check / what else could it be?
Thanks.
I have a little problem I hope you can offer some advice on, I'm getting shaking in the Marlin above 60mph, at 70mph heavy shaking in the wheel (almost too hard to hold) and above that it's back to shaking the car. It's meaning I can't really travel any faster than 60mph anywhere (no real trouble as I don't do to many motorway miles) but it's worrying me that it is occuring.
I'd assumed it was wheel balancing (started when I replaced the tie-rod bushes & had a puncture repaired) so had the wheels balanced to infinity and then balanced on the car as well. Didn't help. I also replaced a tie-rod as I'd stripped a thread on a bolt.
I've got Wolfrace wheels and the bubs have mini type studs on them with bolts. One of the front wheels, (one hole) has a slight ovaling to it and a lip inside, but nothing too bad. I did break a washer so now have a much thicker spring washer on.
I've swopped the wheels and placed the nuts on the other wheel (i.e. swopped the wheels only) on the front and that hasn't helped.
I've checked both wheel bearings (jacked the car up, let the suspension rest on blocks and wobbled the wheel vertically) and there is no play.
I haven't checked the steering rack (as I don't how to yet) but all suspension components look in good condition and have recently been replaced AFAIK.
What else can I check / what else could it be?
Thanks.
Try spinning / driving the wheels with the car jacked up and look for each hub and tyre "kicking", no amount of balancing is going to make a miss shaped wheel / tyre combination true. It is quite common for a tyres tread to warp, particularly if the puncture has damaged its construction slightly (I've known it happen on 2 none damaged continentals).
alternatively it could well be at the rear, a cv joint most probably....and if your 5exi has driveshafts running at right angles like the demonstrator I wouldn't be suprised if they'd only lasted 5 miles before failing.
alternatively it could well be at the rear, a cv joint most probably....and if your 5exi has driveshafts running at right angles like the demonstrator I wouldn't be suprised if they'd only lasted 5 miles before failing.
You know I don't frequent that forum Mark, I'm sure the driveshafts are fine.
As for Donington.....I really don't know, if you're going I'd feel guilty if I didn't and there will be a big TeamGTM presence with a few cars giving Demo rides on the track. But it means camping with the club, which means alcohol and mindlessly stupid conversations into the small hours....... I'll think about it!
As for Donington.....I really don't know, if you're going I'd feel guilty if I didn't and there will be a big TeamGTM presence with a few cars giving Demo rides on the track. But it means camping with the club, which means alcohol and mindlessly stupid conversations into the small hours....... I'll think about it!
Ex-Biker said:
If it wasn't there before you changed the bushes, have you checked they are fitted correctly etc.
Are all the other bushes OK?
I think it's the wheels, yesterday I swopped the wheels on the front, and instead of it pulling to left it pulls to the right.
And reading the comments here reminded me that the wheel balancer said the wheel looked out of true
I think the tyre eggarated this (the view). Is there any way to fix it short of getting a new wheel?
what if I put the wheel on the rear, would that help?
Jack the car up , spin the wheel with your hand lightly on the edge , this will give you an idea if its the tyre , you will feel any separation of the carcase . I had this problem of some well known brand expensive tyres . It happens quite regular , exactly the symptoms you discribed (they replaced the tyres )
Dave Ingerson
Dave Ingerson
mattstead said:
Try spinning / driving the wheels with the car jacked up and look for each hub and tyre "kicking", no amount of balancing is going to make a miss shaped wheel / tyre combination true. It is quite common for a tyres tread to warp, particularly if the puncture has damaged its construction slightly (I've known it happen on 2 none damaged continentals).
I'm still with Ozzie Dave on this one...or should that be he's with me on it?
sorry about the 5exi driveshaft comment, I didn't realise that you had a properly designed roadster
lights blue touch paper and runs
INCOMING!!!! 
I'll have a look at that today. I'm guessing the only solution is new tyres? If by moving the tyres to the rear has reduced the problem, then I'd seriously be looking at those tyres / wheels you've just put on the back, a real bad one will shake the whole car until so you will still feel it in the steering. That would also explain why it will feel worse is the bad one is fixed to the steering wheels.
An Alternative to consider, if there isn't really any difference would be that your prop shaft has gone out of balance which can happen, (although far less likely), a loose / worn engine mounting could give the effect of an out of balance prop as the "loose" engine would thrash the prop about.
My money is still on the tyres
What size, make and model are they? are the wheels sierra ftting? Is there a fellow PH'er near you with alternative wheels you could borrow etc, etc.
An Alternative to consider, if there isn't really any difference would be that your prop shaft has gone out of balance which can happen, (although far less likely), a loose / worn engine mounting could give the effect of an out of balance prop as the "loose" engine would thrash the prop about.
My money is still on the tyres
What size, make and model are they? are the wheels sierra ftting? Is there a fellow PH'er near you with alternative wheels you could borrow etc, etc.
mattshead, thanks for the advice, these are 13" wolfrace rims with some tyres from 1991 I think (yes I know they are old ). The wheels themselves fit onto Marina hubs... I don't know if they have the same fitting as a MGB (there is a place round here that fixes MGB's). I'm not sure how willing to help.
Prop Shaft? We had the engine out to fix a problem with the clutch and had problems with the prop, how do I test for the balance of the prop? Wouldn't the prop be showing it's hand at any revs over 3k5 (70mph in top) rather than over 60mph though? I hadn't driven the car at 70mph since we fixed that/had problems with the tyre...
It needs a longer run to say if it's better or worse (I only had time to say it's still there).
>> Edited by docevi1 on Thursday 22 July 13:48
). The wheels themselves fit onto Marina hubs... I don't know if they have the same fitting as a MGB (there is a place round here that fixes MGB's). I'm not sure how willing to help. Prop Shaft? We had the engine out to fix a problem with the clutch and had problems with the prop, how do I test for the balance of the prop? Wouldn't the prop be showing it's hand at any revs over 3k5 (70mph in top) rather than over 60mph though? I hadn't driven the car at 70mph since we fixed that/had problems with the tyre...
It needs a longer run to say if it's better or worse (I only had time to say it's still there).
>> Edited by docevi1 on Thursday 22 July 13:48
I agree but these tyres are doing ok, they haven't detoriated to badly (only done 11000 miles and have been garaged... To back this up, the wheels/tyres were balanced and fiddle with by 3 different blokes (whom I'm assuming would have been more than happy to sell me new tyres).
I want to replace them, but as a student it's going to cost a fair bit so I'm using them until I need to replace them (which won't be long I reckon).
>> Edited by docevi1 on Thursday 22 July 14:31
I want to replace them, but as a student it's going to cost a fair bit so I'm using them until I need to replace them (which won't be long I reckon).
>> Edited by docevi1 on Thursday 22 July 14:31
My dad is a genius I've been playing, poking, messing about all day (and asked questions here) but it just takes someone who knows where to feel to tell me the possible answer.
Between the tie-rod and the steering rack is a small ball/nut which on the left hand side (where I had the puncture) has a slight play. nothing major, just ever so slight.
The prop shaft is fine, everything but a slight play on the steering at 70mph.
I'm going to take it to a friendly garage tommorrow morning to ask if that could be the problem but fingers crossed
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