c5 hdi hydralic pump

toldem_oldham · Unread post by **toldem_oldham** » 16 Mar 2008, 21:40

As there is no haynes manual yet for the c5 is there a procedure for taking the pump off,it is rattling badly but no problems with the suspension or steering yet but dont wanna risk break down and is it true its £1200+ vat for a new one or am i gettin flanneled a breakers yard wanted £300 with no warranty for 1 from a y plate bit pricey these pumps aint they

AndersDK · Unread post by **AndersDK** » 17 Mar 2008, 00:28

The pump is included in the hydrailic valve block which certainly is "a bit pricy".

Have you fault traced your C5 to a positively defective hydraulic block ?
Even a few quid spend on a Citroen garage for a correct diagnosis may come out as big savings on the final.

wheeler · Unread post by **wheeler** » 17 Mar 2008, 21:00

A BHI unit is around £700 new. If you get one from a breakers make sure its the same spec i.e. sport button, Xenon headlights, variable power steering (only on the V6). if the spec is different it will have to be reprogramed by Citroen or someone with a Lexia/Proxia.

rowanmoor · Unread post by **rowanmoor** » 18 Mar 2008, 14:01

Just out of interest, what difference does the presence of xenon lights make to the programming of the BHI unit? The other options you mention make perfect sense, but I cannot make the connection so assume there is something about the C5 I don't know about (not having one and all).

wheeler · Unread post by **wheeler** » 18 Mar 2008, 18:51

all cars fitted with xenon headlights (from the factory) must have headlamp washers & automatic beam height correction by law. on the C5 it uses the same body height sensors for the auto headlamp adjustment as it does for suspension adjustment, by programming it this tells the BHI that it needs to pass the body height info onto the headlamp ECU's

AndersDK · Unread post by **AndersDK** » 18 Mar 2008, 22:36

Which is exactly the reason why you can not retrofit Xenon lights - except if all the Xenon bells & whistles are fitted too.

rowanmoor · Unread post by **rowanmoor** » 19 Mar 2008, 09:03

I wondered if it was that.

Given that the car is already self levelling, won't the sensors always tell the lights to be in the same position no matter what? Surely about the only fault there can be for the suspension to get the level wrong is a faulty sensor so it would still set the lights to the same position even though it is wrong because it thinks it is right due to a dodgy sensor. Which would make all that complex stuff completely pointless. I guess that is legislation for you.

How do other cars do the light levelling? Do they also use sensors on the rollbars just for the lights?

wheeler · Unread post by **wheeler** » 20 Mar 2008, 06:18

rowanmoor wrote: How do other cars do the light levelling? Do they also use sensors on the rollbars just for the lights?

Well the C4 & the C8 do.

AndersDK · Unread post by **AndersDK** » 20 Mar 2008, 13:08

Some cars use a built in electronic horizontal level sensor.

toldem_oldham · Unread post by **toldem_oldham** » 20 Mar 2008, 15:23

Just had a citroen mechanic look at my hydraulic pump he says its not that and poss bottom pulley thats rattling he says common on c5 so its off to him for a closer look after easter