Knocking sound when turning left

[seanlithman]

Hi I got a knocking sound coming from the rear of the van only when turning left not when turning right, it's usually at speed like coming off a roundabout on a duel carriageway also hear it a little at 60mph+ any ideas ? I changed the cv boots 3000m ago. Could it be the diff?

 

[crede999]

Sounds like cv joints ...did you changed the joints or just boots ?

Chris

 

[Stevenhewkin91]

I have a similar sort of problem, although mine can happen at any time (driving along the motorway at 60 or driving round country lanes) and only happens intermittently. How do you check a c.v? I have checked it for rotational play and vertical play and both sides have slight play but I guess this is normal?

It is quite a unnerving loud noise!

Cheers

 

[mattd1984]

Are you running horseshoe plates or adjustable spring plates at the rear?

 

[Heebee_GB]

Drive shaft wear?

 

[Stevenhewkin91]

hi,

im running adjustable spring plates. i was looking at these thinking this could be the cause but not sure how, if at all?

sorry for the thread hi-jack but hopefully the more info the more helpful for all?

 

[Stevenhewkin91]

Drive shaft wear?

hi,

how do you check for driveshaft play?

 

[seanlithman]

Hi it's a standard set up for a 72 could be drive shaft wear how does one tell? Gave given both drive shafts a tug both move latterly in and out the gearbox but left side is also rattles a bit when tugged. Seems to be loose in the left wheel side cv joint. I suppose that may be the problem . I will change the cv joint and see if that cures it unless anyone has a better idea.

 

[mattd1984]

I am running horseshoe plates and when i originally fitted then i didnt drill a new hole for the Handbrake cable i just ran in underneath the springplate.
For the next few weeks i couldnt work out what this tap tap tap tap noise was everytime i went round a corner. Turner out to the whilst cornering the handbrake cable was running on the inside of the wheel where the wheel weights were.

 

[Trikky2]

but left side is also rattles a bit when tugged. Seems to be loose in the left wheel side cv joint. I suppose that may be the problem .

Yes. There should not be any "rattle"

 

[Stevenhewkin91]

but left side is also rattles a bit when tugged. Seems to be loose in the left wheel side cv joint. I suppose that may be the problem .

Yes. There should not be any "rattle"

mine have a little movement but not so much a "rattle"? both seem to have a fairly equal amount of movement rotationally i.e not alot. also both move laterally to and from the gearbox an equal amount with no unnerving noises?

my latest thinking now is the noise has only started since i lowered the van on the adjustable spring plates some more. my adjustable spring plates arent the expensive ones with the bolt through them to stop them moving laterally? now ive lowered it some more, have i put some more leverage on them to now make them move laterally slightly making the two halves of the spring plates knock against each other? however on this, the noise happens when driving in a straight line, which i wouldnt think would happen?

 

[Trikky2]

To and fro movement of the shaft is normal and vital, otherwise the suspension could not work.

Slight movement of the carrier on the output shafts is also normal.

Rotational play shaft to cv joint or within the cv joint itself is not normal.

They wont suddenly explode or anything but they will become more and more noisy till you replace them.

Lowering the vehicle may increase wear rates of the cv joints a little bit and will highlight any noise/faults due to the changed angle of operation compared to stock.

 

[Stevenhewkin91]

To and fro movement of the shaft is normal and vital, otherwise the suspension could not work.

Slight movement of the carrier on the output shafts is also normal.

Rotational play shaft to cv joint or within the cv joint itself is not normal.

They wont suddenly explode or anything but they will become more and more noisy till you replace them.

Lowering the vehicle may increase wear rates of the cv joints a little bit and will highlight any noise/faults due to the changed angle of operation compared to stock.

I dont think their is any movement in between the driveshaft itself and either CV end. If there is it must bw so minimal that you cant see it on top of the bit of movement there is between the driveshaft and CVs as a whole and the gearbox (which as I believe you are saying is normal)

Is there any method in my madness about my cheapy spring plates moving laterally and causing a knocking noise? There must be a reason the more expensive ones have bolts to lock the lsteral movement?

On a good note i have read elsewhere that they very rarely completely go, they just annoy the owner that much that they eventually change them!

Also I have read that turning the driveshaft 180 degrees so that they are rotating the other way cures them for a while and another thing to check is that all the bolts are tighten up correctly! Seanlitham have you tried these?

Cheers

 

[seanlithman]

Looks like it probably is the outer cv joint causing the knocking just ordered one from Gsf I have never replaced one is it a difficult job any advice would be great
Thanks or the help

 

[Marvel]

Looks like it probably is the outer cv joint causing the knocking just ordered one from Gsf I have never replaced one is it a difficult job any advice would be great
Thanks or the help

Dead easy, but can get messy when you're repacking with grease (although very therapeutic in a pervy sort of way :msn4: )

 

[seanlithman]

Replaced the cv bearing today knocking has gone. Thanks for all the advice

 

[Stevenhewkin91]

Does this sound like a CV gone? Can be heard alot at the start and then agaim majorly right at the end!



Hope the link works.

Pleae ignore the state of the cab mat in the van!!

Cheers

 

[Stevenhewkin91]

Definitely a CV. Took the old driveshaft off to find two split boots, on off the ball bearings missing and the clip that holds it all together missing so when I took it off and moved it it all fell apart! Fitted a spare one I got hold off and it now turns out I could probably do with replacing the other one!

Also whilst nosing around underneath the front of the bus spotted that one of the flexi brake pipes is weeping. Brake fluid is also a little low aswell now I had a ckeck.Good job I have tomorrow off to fix it all before big bang! 

Oh the joys of owning a aircooled vw!!

 

[Shorty]

Hi I got a knocking sound coming from the rear of the van only when turning left not when turning right, it's usually at speed like coming off a roundabout on a duel carriageway also hear it a little at 60mph+ any ideas ? I changed the cv boots 3000m ago. Could it be the diff?

This reminds me of a true story a colleague told me a short while ago.. He was the owener of a Mercedes SLK at the time and had the same 'fault' develop.

He scratched his head unable to work out what it was. He had a friend take a look at it, he couldn't figure out what it was either. So, he had no option but to cough up some money and take it to the main Mercedes dealer. He took the mechanic out on the test drive so he could demonstrate the noise, which , like this instance only happened when he turned left. Nothing was immediately obvious, so they kept the car for the day. Tested this. Tested that. tightened every nut and bolt they could find. The noise was still there.

Later on that day, my friend got a call from the Mercedes dealer saying that they had found the cause of the noise and fixed it. He could come and collect his car at any time...

When he turned up at the garage to collect his car there were smiles all round. The problem turned out to be a can of coke in the centre console!! He asked them how much he owed them for their troubles, but they didn't charge saying they'd not laughed so hard in a long time! :lol: :lol: :lol:

 

[ozziedog]

:lol: :lol: :lol: :lol: :lol:

Mate told me a similar one on his own Disco, turned out to be a golfball under the seat that would stay there trapped for weeks, then rattle about for a day or two then get trapped again.

Ozziedog,,,,,,,,,,, :mrgreen: :lol: :mrgreen: