V6 fuel manifold leak

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

catman - 28 Dec 2003 13:06 GMT

The Giulietta is leaking fuel from the front left (as viewed from in front
of the car) injector coupling. At least that's what I think it's called.
The short piece of pipe between the manifold and the injector top. Is this
hard to replace? Is there anything that I should beware of? Finally,
anyone know what the operating pressure is? It's a 12v if it makes any
difference.

Signature

Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21
Tyger, Tyger Burning Bright (Remove rust to reply)
Allfa 116 giulietta 3.0l (Really). Sprint 1.7
Triumph Speed Triple: Black with extra black bits
www.cuore-sportivo.co.uk

Reply to this Message

Dr Entropy - 29 Dec 2003 14:09 GMT

> Path:
> nnrp3.clara.net!mephistopheles.news.clara.net!news.clara.net!diablo.theplan
[quoted text clipped - 24 lines]
> anyone know what the operating pressure is? It's a 12v if it makes any
> difference.

ACK! IIRC the whole fuel "rail" (read: 'manifold') needs to be released in
order to swap out the line; and if you go thru the hassle of doing ONE...

and try to find fuel line from "Wurth" fasteners: e.g. fuel line made just
for the injector pressures. If it's the Bosh system, the pressure should be
28psi~30psi at the injectors, and supply (pump) pressure somewhere around
32~38psi.

HTH

Signature

Dr E--
mhm 17x1

Linux servers ROCK!

Reply to this Message

catman - 29 Dec 2003 17:28 GMT

>> Path:
>> nnrp3.clara.net!mephistopheles.news.clara.net!news.clara.net!diablo.theplan
[quoted text clipped - 27 lines]
> ACK! IIRC the whole fuel "rail" (read: 'manifold') needs to be released in
> order to swap out the line; and if you go thru the hassle of doing ONE...

Could well be right, but then logically you can't connect them all at the
same time, so hopefully I'll only need to loosen a couple.

> and try to find fuel line from "Wurth" fasteners: e.g. fuel line made
> just for the injector pressures. If it's the Bosh system, the pressure
> should be 28psi~30psi at the injectors, and supply (pump) pressure
> somewhere around 32~38psi.

So not so high I have a hazzard then.

> HTH

As ever ;)

Signature

Reply to this Message

Dr Entropy - 30 Dec 2003 11:46 GMT

<'orrible snippage>

>> ACK! IIRC the whole fuel "rail" (read: 'manifold') needs to be released in
>> order to swap out the line; and if you go thru the hassle of doing ONE...
>
> Could well be right, but then logically you can't connect them all at the
> same time, so hopefully I'll only need to loosen a couple.

Bosch EFI, right? If so, injectors should be removed with the rail and
then you can do 'em all.

> So not so high I have a hazzard then.

Petrol ~is~ the hazzard. Even at 28psi... many early V-12 Jaguar owners
will attest to this. (How do you make a Jaguar bark?
-- leave the original lines in its' injectors: "WOOF!")

>> HTH
>
> As ever ;)

Flatterer.

Signature

Dr E--
mhm 17x1

Linux servers ROCK!

Reply to this Message

catman - 30 Dec 2003 17:36 GMT

> <'orrible snippage>
>
[quoted text clipped - 6 lines]
> Bosch EFI, right? If so, injectors should be removed with the rail and
> then you can do 'em all.

Hmmm. not sure how that would work. According to the cardisc, the
couplings are clipped. I think it will have to wait til the weather warms
a little, and I have time to examine the situation.

>> So not so high I have a hazzard then.
>>
> Petrol ~is~ the hazzard. Even at 28psi... many early V-12 Jaguar owners
> will attest to this. (How do you make a Jaguar bark? -- leave the
> original lines in its' injectors: "WOOF!")

Hmmm. I was more worried about high pressure petrol as opposed to petrol
spraying IYSWIM

>>> HTH
>>
>> As ever ;)
>
> Flatterer.

If the cap fits ;)

Signature

Reply to this Message

Dr Entropy - 31 Dec 2003 10:36 GMT

>> <more><'orrible snippage>
>>
[quoted text clipped - 4 lines]
> couplings are clipped. I think it will have to wait til the weather warms
> a little, and I have time to examine the situation.

Yup: individually clipped to the fuel rail. Only way to get the rail off
and leave the injectors in situ is to remove all the clips first. They're
tricky li'l boogers and will sometimes "fly" off and wedge themselves down
in the piddly bits to hide and cause Mayhem later... Helps to have a
magnetic "wand" on hand for this. The rail is fastened to the intake with
bolts (10mm IIRC), the injectors are sealed at the intake ports with
O-rings thus are more easily 'coaxed' from their seats. Absolute
cleanliness is a must here as well. No "furrin" matter to sprinkle down in
the inlet runners ;-}

> Hmmm. I was more worried about high pressure petrol as opposed to petrol
> spraying IYSWIM

Ahh. There may be a 'Schrader' valve on the fuel rail... you can release
residual pressure (and capture the errant petrol) with that.

Signature

Dr E--
mhm 17x1
SGM #3
smeeter #14
FWAC:"Old No.-7"
Surgeon General-Relativity
Commodore/Upper-Half/1st Virginia Volunteers/CEsium Brigade
NF & TCIB

"If you can't *handcraft* Usenet chaos, then what is there left?"
-- The 2-Belo

"i'm still not sure exactly what a "flonk" is, but i know it pertains to
children's tv programming..."
-- Tampa Stu

Reply to this Message

Dr Entropy - 31 Dec 2003 10:41 GMT

<senior moment>

Sorry for the protracted .sig:

On the Garage Processing Unit ATM... Sorting thru some Alfa bits ;-}

...forgot about changing the sigfile.

</senior moment>

Signature

Dr E--
mhm 17x1

Reply to this Message