RCZ R Loud Knock / Jolt from front wheel - low speed turning

[Anonymous]

3rd visit to dealer, they said this is the 3rd R thats come in with same problem
They said problem occurs between 8000 to 10000 miles and goes when new tyres are fitted.
My cars done 10,000 miles with 4.7mm of tread on front tyres, I don't accept their argument/reason.
The dealer will speak to Peugeot,

Anybody had similar problem?.

 

[thornebt]

Re: RCZ R Loud Knock / Jolt from front wheel - low speed tur

It sounds ridiculous. The dealer should explain what the problem is, not just the solution. Replacing the perfectly good tyres with two new ones with only slightly more tread is not going to make any difference! Perhaps it's worth passing their diagnosis onto Peugeot UK so they can see just how bad the dealer is - although the dealer might not appreciate this!

 

[RCZ-R]

Re: RCZ R Loud Knock / Jolt from front wheel - low speed tur

Are you sure it is the joint knocking?
I have clocked about 45.000 miles on my R on a wide range of surfaces across all of Europe and have no issues with any knocking or play on the suspension parts. But what I have once in a while (especially when it is getting cold) is knocking in low speed turning coming from the brake pads.

 

[RCZ1]

Re: RCZ R Loud Knock / Jolt from front wheel - low speed tur

3rd visit to dealer, they said this is the 3rd R thats come in with same problem
They said problem occurs between 8000 to 10000 miles and goes when new tyres are fitted.
My cars done 10,000 miles with 4.7mm of tread on front tyres, I don't accept their argument/reason.
The dealer will speak to Peugeot,

Anybody had similar problem?.

I've been noticing this same problem on my R the last month or so. I've done nearly 11k miles and the tread still looks good. Serviced in November and the tread was all good then too.

When leaving my work's car park at 10mph, if it's full, I have to do 4 full locks and I've noticed the thud and like a skip/jump. I need to check my tyre pressures to see if they are as they should be.

I only started to notice it after I had an alloy repaired after curbing it. I thought maybe they hadn't out the wheel back on properly or something.

 

[Anonymous]

Re: RCZ R Loud Knock / Jolt from front wheel - low speed tur

Yes same problem. Based on the fact I discounted tyre pressure, occurs when pressures are exactly correct.
Same for wheel repair. This happening is alarming the noise and jolt is severe. There are no problem witness marks of evidence.
I'm going to get dealer to confirm suspension set-up, ( Camber and caster angle and toe-in ).If they cannot I will get Demon-Tweekes to do.
I suspect the friction and resultant forces is the variable that exposing the problem.
Friction is proportional to contact area / contact roughness, supported by the changing tyres eliminate. A new tyre will have less contact area (effect of reducing groove draft angle ).

My guess is Peugeot know, The suspension wishbones bushes are carried over from other model (cheap).
The RCZ track width and mountings result in greater shear forces in tyre contact patch.
My guess is Root-cause countermeasure is changing bush to higher spec / cost bush material.

 

[Anonymous]

Re: RCZ R Loud Knock / Jolt from front wheel - low speed tur

if it occurs when cold it is the limited slip differential waking up. I don't think it is an issue as mine has done it occasionally from new and usually when it has been raining for some reason.

 

[Anonymous]

Re: RCZ R Loud Knock / Jolt from front wheel - low speed tur

Met with Dealer Principal yesterday. The Dealer Principle will be meeting the Peugeot regional Warranty manager Thursday 4th Feb, pre-arranged meeting, he will discuss this matter and agree next step.
As preparation, the dealer has agreed, Tuesday 2nd Feb, to measure suspension geometry and compare to standard,.
I will check results myself, Toe-in Camber and Castor angle. Rear parallel alignment, camber.

2 Senarios

1. Results OK - Within spec..
I will request them to ring me and explain the next step.

2. Tuesday check - Results NG - They will correct and re-measure, re-test.
knock problem gone NO - See 1. above.
YES - Happy


kind regards

 

[RCZ-R]

Re: RCZ R Loud Knock / Jolt from front wheel - low speed tur

if it occurs when cold it is the limited slip differential waking up. I don't think it is an issue as mine has done it occasionally from new and usually when it has been raining for some reason.

Each FWD car equipped with an LSD will act/react on wet surface like you described. The easiest test for that is to enter a wet parking lot with concrete or painted surface. Then lock the wheels to the left or right (some cars are more prone to this effect when fully locked to the left, some to the right) and drive or accelerate slowly. More like crawling. The car will jump slightly or thud, as described here.
You do not feel that effect on tarmac as the tire's tread is working more freely on the tarmac stone. On a plain concrete surface there is no chips and stones for the tire's tread to crawl on them. Thus this "jumping" effect.

Just put the wet palm of your hand on the table and try to move around. It can be a jerky exercise. Now do the same on a soft or coarse surface. Much easier.

I hope I was able to explain this effect with my limited English. :greetings-wavingblue:

 

[Anonymous]

Re: RCZ R Loud Knock / Jolt from front wheel - low speed tur

It sounds like the front LSD, if its "wound up" then it releases and you get a bang, it does not affect the diff or the car, its normal and just takes some getting use to.
Check your tyre pressures though and check for un even wear also (not related to the diff but could be a minor problem later on and need the tracking doing).

 

[RCZ1]

Re: RCZ R Loud Knock / Jolt from front wheel - low speed tur

if it occurs when cold it is the limited slip differential waking up. I don't think it is an issue as mine has done it occasionally from new and usually when it has been raining for some reason.

Each FWD car equipped with an LSD will act/react on wet surface like you described. The easiest test for that is to enter a wet parking lot with concrete or painted surface. Then lock the wheels to the left or right (some cars are more prone to this effect when fully locked to the left, some to the right) and drive or accelerate slowly. More like crawling. The car will jump slightly or thud, as described here.
You do not feel that effect on tarmac as the tire's tread is working more freely on the tarmac stone. On a plain concrete surface there is no chips and stones for the tire's tread to crawl on them. Thus this "jumping" effect.

Just put the wet palm of your hand on the table and try to move around. It can be a jerky exercise. Now do the same on a soft or coarse surface. Much easier.

I hope I was able to explain this effect with my limited English. :greetings-wavingblue:

This is actually spot on. I'd noticed a clunk and a skip in the work car park the last few months, when on full lock. The work Carpark is concrete and when it was dry earlier in the week, the first time for months, there was no skipping or clunking on full lock.

Thanks for the explanation RCZ-R. Feeling much relieved.

 

[RCZ-R]

Re: RCZ R Loud Knock / Jolt from front wheel - low speed tur

You're welcome :wave: I'm glad it was a helpful piece of info