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[nordic]

Hello.

I have noticed that the breather pipe heading from the Brake Servo to behind the rear of the engine appears to have two joins for smaller breather pipes to attach?

The first smaller breather pipe is attached just below a circular disc shape in the main breather pipe as you head away from the servo.  This thin hollow pipe has a singular 'elbow' coming out of it that leads away towards the bulk head.

Should this single rubber elbow be attached here?

Just beyond this, moving away from the servo, is a small hole that is sucking in air. One presumes that whatever was attached to it has broken off?

Below this there is a loose 't-bar' with smaller breather pipes attached to it.

Should this 't-bar' and smaller pipes be conected to the main breather pipe from the servo? If so is it in the right place? Or should it proceed the singular elbow?

I have notioced the brakes on the car being very poor - one presumes as a result of this very small, but noticable, leak.

Any help would be appreciated?

Should there be any piping left to hang loose back there?

Thanks

Andy :-/

[Tony H]

Thats not the breather system its the vacuum circuitry which is responsible for operating all sorts of wierd and wonderful things on the Omega, however a leak in it should not effect brake efficiancy I would look elsewhere for the problem. No doubt someone with a bit more knowledge of vac pipe lay out will be able to answer your other questions

[hotel21]

If there is a leak in the servo piping then the brake efficiency will be compromised, similar to driving a towed car with the engine not running.

Really need to investigate how/why leak is there.  Missing pipes?  There is a guide on here somewhere showing what pipes go where....   

[Entwood]

Have a read here ...

http://www.omegaowners.com/forum/YaBB.pl?num=1152565204

[hotel21]

Thanks Entwood....   

[Tony H]

If there is a leak in the servo piping then the brake efficiency will be compromised, similar to driving a towed car with the engine not running.

Really need to investigate how/why leak is there.  Missing pipes?  There is a guide on here somewhere showing what pipes go where....   

Agreed a servo pipe leak will effect braking efficiancy, I understood the leak was in the vac pipe system

[Entwood]

If there is a leak in the servo piping then the brake efficiency will be compromised, similar to driving a towed car with the engine not running.

Really need to investigate how/why leak is there.  Missing pipes?  There is a guide on here somewhere showing what pipes go where....   

Agreed a servo pipe leak will effect braking efficiancy, I understood the leak was in the vac pipe system

If you look at the link .. the "missing" pipe seems to be directly connected to the brake servo vacuum pipe .. it will therefore be dumping servo vacuum all the time ....

Now I'll agree it is a smallish pipe ... so it won't dump all the vac .. but the brakes need a LOT of vac to work properly ... so a small leak could well make a huge difference IMHO ..

[Tony H]

If there is a leak in the servo piping then the brake efficiency will be compromised, similar to driving a towed car with the engine not running.

Really need to investigate how/why leak is there.  Missing pipes?  There is a guide on here somewhere showing what pipes go where....   

Agreed a servo pipe leak will effect braking efficiancy, I understood the leak was in the vac pipe system

If you look at the link .. the "missing" pipe seems to be directly connected to the brake servo vacuum pipe .. it will therefore be dumping servo vacuum all the time ....

Now I'll agree it is a smallish pipe ... so it won't dump all the vac .. but the brakes need a LOT of vac to work properly ... so a small leak could well make a huge difference IMHO ..

Yep looking at the lay out you could be right

[Andy B]

.....
Agreed a servo pipe leak will effect braking efficiancy, I understood the leak was in the vac pipe system

Petrol cars use the vacuum from the inlet manifold, diseasals  have a separate vauum pump for the servo brakes.

[Andy B]

......
just below a circular disc shape in the main breather pipe as you head away from the servo.   .......

]

This is a none return valve to maintain the vauum in the servo when you've stopped the engine (and stopped producing a vac at the inlet manifold). They are available separately from Vauxhall, as is the vac tubing to/from the servo, you have a choice of 3 type, no T, 1 T & 2 T's .... or removed from a car in a local scrap yard with a hand Stanley knife. Just becareful, because they get brittle with age.

[nordic]

Thanks for the replies.

It is the vacuum pipe coming from the brake servo.

There appears to have been two small tubes protracting from the vacuum pipe.

The first is still in place and has a single rubber elbow attched to it. Destination unknown behind the engine?

Where the second small pipe should be - there is only a hole which is sucking in air. One presumes that the pipe has broken off?

Loose is a 't-bar' with one rubber end open. I cannot trace where it goes to behind the engine?

One wonders if the single elbow that is in place on the vaccum pipe is in the correct location? Or - whether the 't-bar' should go there?

I have seen the Vacuum pipe advertised upon E-Bay but it only shows one small tube protracting from the vaccuum pipe? Should there be two?

Thanks for all your kind help so far

Andy.

[Boatboy]

I believe there are two variants, one T peice or two, probably dependant on whether you have one vac tank or two.

The pipe you mention disappearing behind the engine probably feeds the vac tank under the scuttle by the pollen filter, which in turn supplies vac for the heater controls.

The T you have flapping in the breeze would supply the vac tank mounted to the intake pipes, which controls the multi rams. As a quick fix (read bodge) I would tape up the hole where the T should be fitted and find a way to fit the T to the other vacuum line.

Steve

[nordic]

Hi,

Having visited my Vauxhall Dealer I have discovered that the 3.0 V6 has two joins coming from the non-return valve.

The part no. is 90304535. £11.80 + VAT

The other V6 Omega's are different.

The hose appears to be made out of PTFE and I will have to source alternative piping as vauxhall only sell it in 10m sections!

I will tape over the hole (temp. measure) and when the weather improves remove the skuttle and attach the pipes in the correct order according to the kindly supplied diagrams above.

Thanks guys for your kind help

[Marks DTM Calib]

Hi,

Having visited my Vauxhall Dealer I have discovered that the 3.0 V6 has two joins coming from the non-return valve.

The part no. is 90304535. £11.80 + VAT

The other V6 Omega's are different.

The hose appears to be made out of PTFE and I will have to source alternative piping as vauxhall only sell it in 10m sections!

I will tape over the hole (temp. measure) and when the weather improves remove the skuttle and attach the pipes in the correct order according to the kindly supplied diagrams above.

Thanks guys for your kind help

Which is wrong.....all pre 97ish were a single outlet, all post 97 were a twin outlet.

If you warm the nylon pipe up, you can replace the one way valve.

Or just source a second hand assembly from a breaker