tenmen

Lignum wrote:

> "tenmen" <stulind@tiscali.co.uk> wrote in message
> news:1157999823.539078.297480@i3g2000cwc.googlegro ups.com...
> >I have just had the turbo repaired but the reason for it going in the
> > first place was that the vacuum was not working. The garage that is
> > repairing it can not find the problem
> >
> Are you referring to the brake vacuum system, or do you mean something else?

its the engine vacuum system that operates the engine turbo

tenmen

Lignum wrote:

> "tenmen" <stulind@tiscali.co.uk> wrote in message
> news:1157999823.539078.297480@i3g2000cwc.googlegro ups.com...
> >I have just had the turbo repaired but the reason for it going in the
> > first place was that the vacuum was not working. The garage that is
> > repairing it can not find the problem
> >
> Are you referring to the brake vacuum system, or do you mean something else?

its the engine vacuum system that operates the engine turbo

tenmen

Lignum wrote:

> "tenmen" <stulind@tiscali.co.uk> wrote in message
> news:1157999823.539078.297480@i3g2000cwc.googlegro ups.com...
> >I have just had the turbo repaired but the reason for it going in the
> > first place was that the vacuum was not working. The garage that is
> > repairing it can not find the problem
> >
> Are you referring to the brake vacuum system, or do you mean something else?

its the engine vacuum system that operates the engine turbo

Lignum

"tenmen" <stulind@tiscali.co.uk> wrote in message
news:1158049688.046306.11870@b28g2000cwb.googlegro ups.com...
>
> Lignum wrote:
>
>> "tenmen" <stulind@tiscali.co.uk> wrote in message
>> news:1157999823.539078.297480@i3g2000cwc.googlegro ups.com...
>> >I have just had the turbo repaired but the reason for it going in the
>> > first place was that the vacuum was not working. The garage that is
>> > repairing it can not find the problem
>> >
>> Are you referring to the brake vacuum system, or do you mean something
>> else?
>
> its the engine vacuum system that operates the engine turbo
>
I'm sorry but you've lost me there. The prime mover for the turbo is the
engine exhaust gases which spin a rotor and compress air by means of vanes
connected to the same shaft as the power turbine. In my basic knowledge of
these turbo systems there is also a dump valve which allows excessive
pressurised air to escape - but no vacuum. In fact there is such a shortage
of vacuum associated with a diesel engine that a vacuum pump has to be
installed, often driven from the engine camshaft, to provide vacuum for the
braking system - as already stated by Mr Bartam.

Diesels and vacuum are anathema and do not exist in the same universe.

Perhaps an explanation of the symptoms you originally experienced may help?

Lignum

"tenmen" <stulind@tiscali.co.uk> wrote in message
news:1158049688.046306.11870@b28g2000cwb.googlegro ups.com...
>
> Lignum wrote:
>
>> "tenmen" <stulind@tiscali.co.uk> wrote in message
>> news:1157999823.539078.297480@i3g2000cwc.googlegro ups.com...
>> >I have just had the turbo repaired but the reason for it going in the
>> > first place was that the vacuum was not working. The garage that is
>> > repairing it can not find the problem
>> >
>> Are you referring to the brake vacuum system, or do you mean something
>> else?
>
> its the engine vacuum system that operates the engine turbo
>
I'm sorry but you've lost me there. The prime mover for the turbo is the
engine exhaust gases which spin a rotor and compress air by means of vanes
connected to the same shaft as the power turbine. In my basic knowledge of
these turbo systems there is also a dump valve which allows excessive
pressurised air to escape - but no vacuum. In fact there is such a shortage
of vacuum associated with a diesel engine that a vacuum pump has to be
installed, often driven from the engine camshaft, to provide vacuum for the
braking system - as already stated by Mr Bartam.

Diesels and vacuum are anathema and do not exist in the same universe.

Perhaps an explanation of the symptoms you originally experienced may help?

Lignum

"tenmen" <stulind@tiscali.co.uk> wrote in message
news:1158049688.046306.11870@b28g2000cwb.googlegro ups.com...
>
> Lignum wrote:
>
>> "tenmen" <stulind@tiscali.co.uk> wrote in message
>> news:1157999823.539078.297480@i3g2000cwc.googlegro ups.com...
>> >I have just had the turbo repaired but the reason for it going in the
>> > first place was that the vacuum was not working. The garage that is
>> > repairing it can not find the problem
>> >
>> Are you referring to the brake vacuum system, or do you mean something
>> else?
>
> its the engine vacuum system that operates the engine turbo
>
I'm sorry but you've lost me there. The prime mover for the turbo is the
engine exhaust gases which spin a rotor and compress air by means of vanes
connected to the same shaft as the power turbine. In my basic knowledge of
these turbo systems there is also a dump valve which allows excessive
pressurised air to escape - but no vacuum. In fact there is such a shortage
of vacuum associated with a diesel engine that a vacuum pump has to be
installed, often driven from the engine camshaft, to provide vacuum for the
braking system - as already stated by Mr Bartam.

Diesels and vacuum are anathema and do not exist in the same universe.

Perhaps an explanation of the symptoms you originally experienced may help?