W211 220cdi power steering

[SHAMGIT]

W211 220cdi 07 reg power steering

When cold or hot on tickover screaching and juddering on full lock.if revs are increased screaching is still there not as loud but juddering stops.fluid level is good.had new belt and tensioner fitted .it didn't help at all. Have tried steering left to right with front wheels of the ground
What do you guys think..pump or rack

Thanks for any help

 

[alexanderfoti]

Is it blowing any fluid out of the res?

 

[SHAMGIT]

No ..and.fluid is at correct level.

 

[alexanderfoti]

I would say more likely to be pump then. Cannot say 100% though.

 

[Steve@Avantgarde]

You sure you haven't got a seized pulley on the belt system? Possibly a noisy ball joint? Usually the one way alternator pulley is the culprit.

 

[SHAMGIT]

You sure you haven't got a seized pulley on the belt system? Possibly a noisy ball joint? Usually the one way alternator pulley is the culprit.

Ball joints okay. One done for recent mot
Everything spinning ok

 

[SHAMGIT]

You sure you haven't got a seized pulley on the belt system? Possibly a noisy ball joint? Usually the one way alternator pulley is the culprit.

Got back from hols.
it's now fixed.
As you said alternator pully.

Thanks steve