Clonk on full lock when reversing

[neil_bolton]

When I turn the steering on full lock in a particular direction, I get a clonking when reversing; I'm thinking possibly CV Joint?

Can anyone suggest what else it could be?

[MX-5 Lazza]

I bet your tyres are getting a bit long in the tooth...
It's a normal thing. Doesn't happen to all cars but does happen to many, especially when the tyres are worn. It's just the power-steering rack complaining about the pressure being fed back while being held on full lock. Making sure the geo is correct can help it but might not. Basically, if you don't have any other symptons (noise on cornering, clunks from steering etc) then don't worry about it.

[neil_bolton]

Only thing I do have is pulling to the left when freewheeling.

The tyres on the front I'm not sure about, but I'll check. No other suspicious noises but I did pump them up yesterday for the first time since I'd got it; they were rather low... (noise still happens)...

[_Batty_]

CV joint. i'd be almost positive.

[Blackbullet]

hmm I'm getting what I can describe as a graunching noise, when turning right between half and full lock. Sounds terrible manoeuvring at slow speed.

Fingers crossed will getting my hands on P5's new SportDrive at around Xmas so will while fitting those am replacing tie rod ends and a couple of ball joints as the protectors have come off.
Sorry for the hijack, but would the ball joints cause this noise or is it something else similar to the above i.e. cv joints?

thanks for your help
Andy

[Hugo a Gogo]

why do MX5s have a CV joint?

[snotrag]

On the rear, obviously...

But RWD cars (apart from those with live axles) also need CV joints...

If you think about the path that the wheel follows as it mvoes up and down, it moves in relation to the diff... you need CV joints on both ends of the driveshaft to account for this.

I would assumed that they probably last better on Roadsters than those on a FWD car as they move about a less.

[Hugo a Gogo]

snotrag said:

On the rear, obviously...

But RWD cars (apart from those with live axles) also need CV joints...

If you think about the path that the wheel follows as it mvoes up and down, it moves in relation to the diff... you need CV joints on both ends of the driveshaft to account for this.

I would assumed that they probably last better on Roadsters than those on a FWD car as they move about a less.

just a matched pair of regular UJs would do the same job, like on a jag IRS

just the comment about it happening at full lock made me think of the front end

[Jonny671]

Quite normal on the MX-5.. Is it a MKII?

[genericguy]

When I was at autolink they mentioned I had a knock on the steering (I think that was the term!).
He checked for me and said it is pretty well-known on mkiis and wouldn't be an MOT failure.
Hadn't even oticed it before he showed me so not bothering to do anythuing about it.

[neil_bolton]

Hugo a Gogo said:

snotrag said:

On the rear, obviously...

But RWD cars (apart from those with live axles) also need CV joints...

If you think about the path that the wheel follows as it mvoes up and down, it moves in relation to the diff... you need CV joints on both ends of the driveshaft to account for this.

I would assumed that they probably last better on Roadsters than those on a FWD car as they move about a less.

just a matched pair of regular UJs would do the same job, like on a jag IRS

just the comment about it happening at full lock made me think of the front end

Yep, it's front end alright.

ETA it just went through it's MOT so it can't be anything too bad?

Edited by neil_bolton on Wednesday 2nd December 15:22

[MX-5 Lazza]

Like I said before, it's not a fault with anything, it's normal on some cars. On my previous car, a 98 Mk1 Berkeley which I had from new it always did it when the front tyres got past about half worn.