Weird noise when in full lock

[Aeleys]

'Ello, it's a mk IV fiesta and when in full lock there is a weird noise, like a grinding cant figure out what it is, thought some of you would know or at least have a better guess than i do

cheers.

 

[Aeleys]

If it's the noise I'm thinking of, it's common and I wouldn't worry.

yeah im not too worried about it, seems to be common on older cars i just wanted to make double sure

 

[Aeleys]

Do you mean when moving or stationary? If stationary, when you reach full lock you often get a noise that could be described as grinding (but more like a whining really) from the power steering pump, which is normal in my experience.

If you mean when moving slowly, a noise on full lock can likely be a knackered CV joint on a FWD car, but then that's usually more of a clunking than grinding! Grinding noise could be as simple as tyres fouling on the wheel arch. Everything standard and undamaged?

CV is a tiny bit worn, but tyres clear the arches fine, and it happens when moving very slowly/stationary

My MK4 Fiesta did the same, it was a brief whining noise from the PAS pump at full lock. Check the fluid level anyway just in case.

i checked the level, first thing i did seems fine

 

[Aeleys]

Well if it definately happens when stationary you can absolutely rule out CV joint or tyre rubbing. So it sounds just like the normal whine from the pump when on full lock. If levels are fine and no leaks or owt - should be fine. If it starts to sound really nasty, followed shortly by having no power steering, you might want to get it looked at .

i'll jot that down! lol

I was always told it's bad for the power steering pump to be in full lock..

so how are you meant to drive surely ford, or any other car manufacturer would have noticed this?

 

[Aeleys]

It's not a great idea to hold the wheel hard against the lock stop. The noise you hear is the pressure relief valve opening because you are making the PAS pump work into a "dead end", i.e. no fluid can flow so pressure increases dramatically. This is especially bad if the fluid is cold, and therefore more viscous.

There was an older car that had the PAS pump driven by the timing belt, and as the cars aged there were quite a few timing belt failures caused by driver holding the steering hard against the lock stop first thing in the morning. Can't remember what the make & model was now, perhaps someone on here will know? Most cars have a separate auxiliary belt for hydraulic power steering, so this is less of a problem (unless that belt snaps and gets pulled into the timing belt - not uncommon on some cars).

Oh, BTW it's 'have', not 'of'.

It's only on full lock for about 1 minute during each use (to get in and out of driveway)

and i don't know what grammar has to do with what i asked? everyone has answered with no question as to what i was saying, even with mistakes

 

[Aeleys]

He answered too.

Why did you write of instead of have? Do you know it should be have? If so, why wouldn't you right it? If not, now you no.

because
1) was done on my phone
2) I'm not sitting an English test?

it baffles me that people think they are the be all and end all of the English language...