Lowering Suspension No Engine

Xaccers · Post by **Xaccers** » 17 Jan 2010, 17:25

From the prices I've seen, a remap is several hundred quid, and from my experience of driving 90bhp Hdi's, I can see why people would be prepaired to pay that much.
Personally, I like the inexpence of being able to just use a T27 and a 13mm socket.
Similarly 80ppl off the shelf (or cheaper) or £1.10 at the pump for fuel.
At least the DMF was never fitted to Xantia Hdi's, shame about the disintegrating fuel pumps in the tank though.

People are entitled to their own opinions and it's ok if they differ.
For me, the risks added to the Hdi outway any benefits (not that I can actually think of any) of it.
Doesn't mean someone's wrong to accept those risks and have one.

acrowot · Post by **acrowot** » 17 Jan 2010, 18:06

Xac wrote:From the prices I've seen, a remap is several hundred quid, and from my experience of driving 90bhp Hdi's, I can see why people would be prepaired to pay that much.
Personally, I like the inexpence of being able to just use a T27 and a 13mm socket.
Similarly 80ppl off the shelf (or cheaper) or £1.10 at the pump for fuel.
At least the DMF was never fitted to Xantia Hdi's, shame about the disintegrating fuel pumps in the tank though.

People are entitled to their own opinions and it's ok if they differ.
For me, the risks added to the Hdi outway any benefits (not that I can actually think of any) of it.
Doesn't mean someone's wrong to accept those risks and have one.

The lift pumps are quite cheap on Ebay, there are aslo electronic gadgets on there to increase BHP to aroun 110 but as I said I am not really interested in doing this so it really is not a problem for me, what BHP I have is enough for me, I have a friend who has a Lexia he is a MOT inspector but I will not be asking him to remap. I also have a friend in my local scrappy from whom I get preferential treatment so second hand perts are not really a problem, I would probably use GSF Anyway. But I have to say I have had at least 6 1.9TDs over the years and I am not knocking them, I truly believe that for me I do like the HDI.
Xac, If you read my OP I was asking for help with de-pressurising which I did not get from you, this is now off topic so I will not be responding further, if you want the last word it is yours to take.

XantiaDaveEire · Post by **XantiaDaveEire** » 17 Jan 2010, 23:08

no need to have an attitude mate...

jonathan_dyane · Post by **jonathan_dyane** » 19 Jan 2010, 20:23

handyman wrote:Hullo Acrowot, to answer your question, that seems to have gotten overlooked, yes, you can depressurize the system without the engine running.

Simply switch on the ignition, move the suspension level lever to 'low', stick your head under the bonnet and open the pressure bleed valve on the regulator block, 12mm head, next to the accumulator sphere. That should release the pressure in the system, sufficient to remove parts, assuming they are not spheres as you will need maximum pressure to 'crack' the joint on these.

Handyman

I'm sorry, but that isn't true, without hydraulic pressure to open the anti sink valve, depressurisation of the suspension cannot occur. I'm also interested as to how turning on the ignition would help help when the only electrical part of the system is the warning light for low LHM/low system pressure?

The only way to defeat the anti-sink is to run the pump to open the anti sink valve (Paul makes an excellent suggestion how this could be done) or crack open a pipe (which I personally wouldn't recommend). Or wait a long time...

On another note, I feel duty-bound to state that I myself am a XUD man, and consider it the bestest engine of evah.

citroenxm · Post by **citroenxm** » 19 Jan 2010, 20:55

EXACTLY!

You NEED to build pressure UP to open the Anti sink valves!

I CANT NOT beleve my post looks like it got OVER LOOKED!

You can only pressure up the system by running the pump off a drill as I sugested, by having a 13mm nut in the Pully, and an adapter in the drill to use a 13mm socket.

Whizz the pump, have the lever in low, and as the system pressures up, then anti sink valves open, and the car drops to low!!

Then open the regulator, and the system pressure is out..

Personally, opening a Feed pipe under system pressure will make a RIGHT MESS.

Paul

DickieG · Post by **DickieG** » 19 Jan 2010, 20:56

Keeping with the original question of how to de-pressurise the hydraulic system you can follow Pauls' advice in the first reply or remove the belt and turn the pump by hand, it won't be easy but having recently tested a pressure regulator to over 25 bar beyond the maximum pressure of 175 bar it can be done manually if you're determined.

Moving back off topic I thought the HDi had the big advantage over an XUD with a cambelt failure of the rockers being designed to break (no bent valves or removing of the head, it worked for Toby on his HDi).

BTW is Acrowot from R/C flying?

citroenxm · Post by **citroenxm** » 19 Jan 2010, 20:59

Its impossible to turn a Pump pully when system pressure is present! Beleve me, Ive tried it...

Yes, the HDi does break rockers.. If you do not bend valves in XUD you HAVE been very lucky!

The XUD is STILL the top engine! Thought I AM I big fan of HDi 110bhp engines too!!

Paul

jonathan_dyane · Post by **jonathan_dyane** » 19 Jan 2010, 21:04

I have successfully used the motor from a pillar drill and long belt to pressurise a CX with a dead engine, but that is less suited to the Xantia with its multi v belt.

Dickie G, you must have far stronger hands than me

DickieG · Post by **DickieG** » 19 Jan 2010, 21:05

citroenxm wrote:Its impossible to turn a Pump pully when system pressure is present! Beleve me, Ive tried it...

You should have eaten a Weetabix

citroenxm · Post by **citroenxm** » 19 Jan 2010, 21:07

Well, ok, its dammm blydi hard I tell you that much!

I wouldn't like to turn it by hand the amount it needs to activate the anti sink valves!

Paul

acrowot · Post by **acrowot** » 22 Jan 2010, 22:43

DickieG wrote:Keeping with the original question of how to de-pressurise the hydraulic system you can follow Pauls' advice in the first reply or remove the belt and turn the pump by hand, it won't be easy but having recently tested a pressure regulator to over 25 bar beyond the maximum pressure of 175 bar it can be done manually if you're determined.

Moving back off topic I thought the HDi had the big advantage over an XUD with a cambelt failure of the rockers being designed to break (no bent valves or removing of the head, it worked for Toby on his HDi).

BTW is Acrowot from R/C flying?

I tried to de-pressuise with out running the pump without sucess, in the end I snipped a pipe on a front strut and shut the bonnet PDQ, what a mess, but it is all done now.
Yes Acrowot is from R/C flying.

DickieG · Post by **DickieG** » 22 Jan 2010, 22:52

acrowot wrote:Yes Acrowot is from R/C flying.

Great aircraft