Rumble/vibration when cruising |
Post Reply |
Author | |
21windows
Groupie Joined: 03 Mar 09 Location: Plymouth, South Status: Offline Points: 200 |
Post Options
Thanks(0)
Posted: 12 May 11 at 18:42 |
Hi Guys
We have a 2000 plate T4 2.5 TDi automatic caravelle that has developed a nasty rumble/vibration when driving between 40 - 60 MPH.
The garage has checked the wheels and tyres (fitted 2 new fronts and all 4 balanced) checked tracking, checked suspension, steering and ball joints etc and cannot find what is wrong.
There does not appear to be a problem when accelearting or braking but the problem is very noticable when on fasirly straight flat roads.
We get a runble like we are running over a rumbl;e strip for about 1 second then it stops for a couple of seconds then starts again. This goes on and on.
Does anyone have any ideas what this may be?
many thanks
Graham
|
|
Tee4
Vanorak I'm not indecisive,or am I?You bet I am! Joined: 23 Dec 04 Status: Offline Points: 6307 |
Post Options
Thanks(0)
|
Wheel bearings or cv joint?
|
|
21windows
Groupie Joined: 03 Mar 09 Location: Plymouth, South Status: Offline Points: 200 |
Post Options
Thanks(0)
|
all checked and fine!
|
|
Tee4
Vanorak I'm not indecisive,or am I?You bet I am! Joined: 23 Dec 04 Status: Offline Points: 6307 |
Post Options
Thanks(0)
|
Could be a belt pulley problem or an auto box problem. Is it changing up and down and doing its kick down ok?
|
|
21windows
Groupie Joined: 03 Mar 09 Location: Plymouth, South Status: Offline Points: 200 |
Post Options
Thanks(0)
|
Had all new belts about 1000 miles ago.
Kick down fine and changes through all the gears fine.
|
|
Tee4
Vanorak I'm not indecisive,or am I?You bet I am! Joined: 23 Dec 04 Status: Offline Points: 6307 |
Post Options
Thanks(0)
|
How strange |
|
Or_GazM
PROBATION Joined: 16 Oct 09 Location: Norway Status: Offline Points: 781 |
Post Options
Thanks(0)
|
I had a similar thing, suddenly started, then went away when I changed wheel/tyre combinations.
I was on 15" VW alloys with Conti Vanco tyres....then changed to 17" rims and new tyres....NO rumble.
Put the winter tyres (from the old steelies) onto the ally rims, still no problem.....so I can only assume there was something with the tyres...even though they were legal and balanced.
See if you can try a set of wheels from another van....
|
|
sm4rt
Yardie Joined: 11 May 08 Location: Fareham Status: Offline Points: 289 |
Post Options
Thanks(0)
|
Do you have non-original alloys?..
If so you you might need to check if they should have adapter spigots fitted May have 'developed' if the wheels have been off and spigot fell out or not fitted and wheels slightly off centre ?.. Just a thought |
|
Sm4rt
... Flying the flag ... |
|
Tee4
Vanorak I'm not indecisive,or am I?You bet I am! Joined: 23 Dec 04 Status: Offline Points: 6307 |
Post Options
Thanks(0)
|
Yeap I agree about spigot rings, but I would have thought with out them it would be apparant all the time rather than just a quick rumble |
|
Or_GazM
PROBATION Joined: 16 Oct 09 Location: Norway Status: Offline Points: 781 |
Post Options
Thanks(0)
|
Err...Spigot rings...yeah, maybe
But WTF...once you have the wheels ON and BOLTED, they shouldn't move
Rings make them easier to fit, but I don't see how a bit of plastic can hold them better than the 5 bolts you have torked to the correct settings
|
|
jets
Groupie Joined: 31 Dec 06 Location: Australia Status: Offline Points: 143 |
Post Options
Thanks(0)
|
I noticed it's an auto. Have you plugged it in to see if there are any fault codes. A faulty/worn torque converter can give that type of symptom.
Edited by jets - 15 May 11 at 07:40 |
|
mallott
Groupie Joined: 18 May 10 Location: Tavistock Status: Offline Points: 169 |
Post Options
Thanks(0)
|
you have harmonic vibration, the vibration will be there all the time. It is just at certain speeds the frequency of the vibration is in tune with the vehicle, being amplified by the fabric of the vehicle to the point you can hear it.
You say everything is checked and fine, tyres would be my first port of call, maybe even trying a swap front to rear, different toe settings maybe.
|
|
Tee4
Vanorak I'm not indecisive,or am I?You bet I am! Joined: 23 Dec 04 Status: Offline Points: 6307 |
Post Options
Thanks(0)
|
Even though when you bolt a wheel on. if its not making the correct contact with hub it effects the way the wheel revolves. I only ver had the none spigot thing happen on my last Caddy TDi when I Pput 17`s with out spigot rings on. It drove terrible |
|
sm4rt
Yardie Joined: 11 May 08 Location: Fareham Status: Offline Points: 289 |
Post Options
Thanks(0)
|
Wasn't suggesting that they would move when bolted, but as Tee4 says, if the spigots aren't fitted and you take a wheel off (service brakes, puncture etc) then when you put it back on, you only need to be a fraction mis-aligned to get problems. The 'bit of plastic' ensures perfect alignment every time with the hub - you'd be amazed at the difference... but like I said just a possibility if its not any of the obvious stuff |
|
Sm4rt
... Flying the flag ... |
|
Post Reply | |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |