Judder judder

[Technobadger]

Hey guys
Our 1.6 td Cali has developed a knocking on full lock.
It is power steering, the rack and pipes where all new last year.
It has lost no fluid, and it only does it when we first start the van, there is also a knocking/ juddering on full lock that disappears after a few minutes.

Any thoughts welcomed

[CovKid]

Wheels too much for the power steering? Seen it on cars.

[Technobadger]

How do you mean ?
We have not changed wheels or tyres

[kevtherev]

so they are standard VW wheels then?

[Technobadger]

No they aren't
But they have been on it for a long time.
They are very light alloys
Do you guys reckon that hey could be the cause?

[billy739]

is the noise defo from the front?

when you changed the rack /pipes can you prove the pump / fluid bottle were cleaned/flushed through including the filter being cleaned?

[Technobadger]

No sorry I should have said
The noise comes from the back
I've checked the pump, and it's still bolted on.
The steering wheel kind of pulses as you approach full lock.
All this stop after a few minutes as if it where a lack of pressure on initial start up

[billy739]

when you changed the rack /pipes can you prove the pump / fluid bottle were cleaned/flushed through including the filter being cleaned?

if this is not he case you need to do it , as it may have already damaged the new rack

[Technobadger]

The fluid was all replaced when the rack and pipes went on.
However I didn't see a filter. Where will I find it ????

[billy739]

filter is inside the resivoir

strip it down, hoping its still fitted of course!

wash it in some thinners/ petrol ect

system will need to be flushed through , not just drained/ replaced

[Technobadger]

I'll give it a try

[Technobadger]

It's the belt

With the engine running and the steering wheel turning the belt starts to slip under load

Phew

Cheers guys got there in the end, should open my eyes more.