Sus pumps. Diesel for petrol.

[seanrx]

Hi there.
Suspension pumps. Is same type used on all fuel types and 3 and 3+ ?

My 54 plate 16v can use an 05 diesel?
If it's 3, will it work on my 3+ system ?

And can somebody explain the air priming of refilled LDS tank ?
Once you've removed primer system, ( plastic bag with hole in it, rag and piece of pipe ? ) how system holds pressure while you screw on LDS cap ?
I've lots of info to gather.

[Hell Razor5543]

LDS is used in both Hydractive 3 and 3+ systems. I cannot help with some of the other questions, but once the suspension pump has been primed it will remain primed even if you lower the suspension to service low and take the cap off (you would need to do this anyway to check the LDS level). The cap has a simple valve built into it to allow air in (when needed) but not let air out.

[Gibbo2286]

You need to get the right pump, match the one you take off, there are several different part numbers so there must be differences but can't help with what those differences are.

If it's the electric motor that's failed you could possibly just swap that (Or even repair it if you're lucky) I don't think there's any difference in the motors, only the ECU on top of the unit.

I've not seen one that's failed through any other reason than the motor, it's usually caused by water ingress through the breather hole on the bottom or oil getting in past the spindle seal, either will turn the innards of the motor into a messy sludge or corrode the copper wires.

[hirsty]

When my suspension pump packed up and would not rise after replacing, turning from lock to lock seemed to cure the problem of priming. Costs "nowt" and worth a try.

hirsty

[darbuck]

just curious are the suspension ecus interchangeable or are they locked to the car they come out of like the injection ecu and bsi

[xantia_v6]

I think it has been reported before that they are not coded to the car, but must be matched to the spec. of the car.

[darbuck]

interesting cheers for that

[GiveMeABreak]

Between the MK I and MK II there are at least 16 different pumps depending on engine type and things such as:
Variable PS, Auto Headlamp Adjustment
Unvariable PS and Auto Headlamp Adjustment
Unvariable PS and without Auto Headlamp Adjustment
Heavy Duty Suspension or not...

I didn't bother going any further, suffice it to say there are quite a few. As said above they are not coded, but need to match your vehicle specs.

[seanrx]

Ta for all your replies and 16 different types?
Right now, a motor clean is my only quick option.

I now have the arch liner off. And to be sure, its the pump only, that I see in there hanging next to washer unit and that the motor is under the LDS tank?
They are joined only by the fluid hose that passes through the chassis wing?
Right now, its the motor only that I want to clean.

[Gibbo2286]

I should have asked before but I suppose you have checked the other reasons for failure i.e. the master fuse ( on the underside of the under bonnet fuse box) and the fuse board connections, they have in the past been found to be corroded/burned and the fuse popped.

[seanrx]

Maxi fuses are fine. Don't know electrics, so I assume ( hope ) that wiring is good.
Two years ago the fuse went, after having it jacked up too long for a disc change.

[GiveMeABreak]

I haven't had the need to undertake this operation (yet), so can't advise directly - but looking at the documentation for removing / refitting / replacing, the system needs to be de-pressurised if you are gong to remove the complete BHI.

There are also references to relearning and programming the reference heights on completion - but I suspect that will be if replacing the integrated suspension ECU with another unit, which retains this information, so may not be required if replacing it with the same ECU (which is built into the BHI).

I'm sure others who have done the motor 'clean-up' operation may be able to better assist you, but if you want the removal procedure for your car, then PM or post your VIN and I'll email it to you.

[seanrx]

Thanks Marc, but right now I just need a quick answer to my last post.
Am here spanners in hand.
Motor is under LDS tank and pump is separate on the wing?

[GiveMeABreak]

No, the BHI is a complete unit from the diagram: This is for a Mark I C5, as I don't have your VIN - Click to zoom:

The LDS reservoir tank is separate and connected by the hoses - yes as far as I can see.

[seanrx]

That's good to see. I've just emptied the LDS.
So its only the lump in the wing thats coming out.