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Leeds_finest

E34 PAS pump whine

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Mine leaks from the box, and when it gets low enough it starts groaning within a couple of seconds, can be quite alarming! My reservoir is all gungy as well, they tend to just get like that. E39 is the same.

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I've got an E39 PAS pump to replace as it groans like a bastard and the steering has a habit of going very stiff now and again. I need to clean out the reservoir but I'm planning on replacing the pump anyway as they're not hard to do.

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I'll check but I think they're crimped.

The crimp clips are ok when new but overtime the pipes soften up & they become loose then start leaking. The fluid also gets blown around by the viscous fan making a bit of a mess!

I've changed mine in the past for jubilees which seems to have done the trick but you need to be careful not to over-tighten them & crush or break the outlets on the reservoir.

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Ok I think new clips are in order.

Just out of interest, does anyone know which pipe is the return pipe from the pump or box?

I can see one goes to the pump and one to the box, but which way does the fluid flow?

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