cylindrical gismo on N/s end of rocker cover leaking?

falling-out-with-my-car · 15 Jul 2009, 11:52

Hi,
contrary to the MK 2 xantia Haynes manual I have a cylindrical device on the N/s end of my xantia 1.9 TD estate rocker cover housing which appears to be leaking oil quite a bit. (behind the air filter and to the left of the LHM tank).

can anyone identify this particular part please, I guess it must have an oil seal beneath it on the end of the rocker cover housing.

Thank you in advance

regards Nigel.

Unread post by **CitroJim** » 15 Jul 2009, 12:02

That's your vacuum pump Nigel. It's supplied with oil at full gallery pressure off the end of the camshaft oil gallery. It is sealed with two O rings. Onle small one on the oil gallery and a big thin one around its periphery.

The seals are easy to replace. The job is a little messy.

I'm almost 100% certain that magical oil leak stopper additives won't cure it due to the pressures involved.

falling-out-with-my-car · 15 Jul 2009, 13:58

Jim,

thanks for that, why do I need a vacum pump on my Mk 2 then?

my dads vsx diesel Mk 1 doesnt have one at all.

regards Nigel.

XantiaMan · Unread post by **XantiaMan** » 15 Jul 2009, 14:28

falling-out-with-my-car wrote:Jim,

thanks for that, why do I need a vacum pump on my Mk 2 then?

my dads vsx diesel Mk 1 doesnt have one at all.

regards Nigel.

To power the EGR and fast idle set up the later models have.

Unread post by **CitroJim** » 15 Jul 2009, 15:00

It's really a bit of an overkill just for powering EGR and fast-idle but on non-hydraulic vehicles it does also power the brake servo...

falling-out-with-my-car · 30 Jul 2009, 13:11

and EGR is?

falling-out-with-my-car · 30 Jul 2009, 13:21

its Ok citroen maindealers told me "exaust gas recycling". DER!!!

apparently I may have found the cheapest componant ever from a citroen maindealership the oil seals are 60 pence each, ohhh deep joy.

can anyone give me a little bit more detail in maintainning this vacum pump please? or is there a thread covering it somewhere on this site please? any worringing cautions?

regards Nigel.

MikeT · Unread post by **MikeT** » 30 Jul 2009, 14:11

It's nothing to fear Nigel, just remove it replace the seals and refit. If the rotor does need to be aligned, it must be very easy as I have no memory of difficulty in replacing mine when I refitted the head!

Unread post by **CitroJim** » 30 Jul 2009, 17:30

MikeT wrote:If the rotor does need to be aligned, it must be very easy as I have no memory of difficulty in replacing mine when I refitted the head!

That's the only tricky part of the job and even that's not at all difficult. Nigel, one of the easier jobs!

falling-out-with-my-car · 30 Jul 2009, 20:45

mike & Jim,

Ok thanks I'll post again when its done picking up the o-rings tommorrow.
the oil is really leaking badly now.

regards Nigel.

falling-out-with-my-car · 01 Aug 2009, 16:23

jim, MikeT & Xantiaman583,

Thank You for all very much of your help and advice, I Have now replaced the seals and it wasn't to bad a job afterall as you all said.

the pump didnt want to go back on but a little lube on the new seal and some patience getting the pump rotor lined up, which kept faling out of line with the camshaft and it went on ok.

after putting back the pump I started the engine held a clean rag under the pump and reved the engine to raise the oil pressure and presto no leaks.

thanks again everyone.

regards Nigel.

French Car Forum

cylindrical gismo on N/s end of rocker cover leaking?

cylindrical gismo on N/s end of rocker cover leaking?

Job Done Thank You for your help.