C3 Inlet Manifold

[crooner]

hi, i want to replace the inlet manifold on my  C3  14 LX.  2004

does anyone know what is involved step by step of what has to be dismantled how many bolts /screws 

looking at it it doesn't look difficult ,

any help appreciated ,

thanks in advance

[crooner]

i loosened the bolt on what i believe to be the map sensor it only seems to be on with 1 bolt ,

but there still seems to be something stopping it from coming off

anyone know how to slip this off

[paul.h]

This is from the Haynes manual:

 

The map sensor is held by 1 bolt and then just says to remove the sensor - maybe there is a bit of carbon/dirt holding it in.

 

To remove the inlet manifold -

- remove the air cleaner assembly

- remove the fuel rail and injectors after removing the ignition coil. New injector seals should be fitted and a bit of engine oil on them helps to refit to the engine.

- disconnect the wiring connectors and unclip the harness and move it out of the way

- disconnect the vacuum servo pipe and purge valve pipe

- depress the release button and disconnect the fuel pipe

- where needed, undo the bolts and remove the manifold underside support bracket

- undo the manifold retaining nuts, remove the manifold again recover the 4 seals - new ones should be used on refitting.

 

Whilst the manifold is off, give the throttle body/plate a good clean with carb cleaner to help tickover.

[crooner]

This is from the Haynes manual:

 

The map sensor is held by 1 bolt and then just says to remove the sensor - maybe there is a bit of carbon/dirt holding it in.

 

To remove the inlet manifold -

- remove the air cleaner assembly

- remove the fuel rail and injectors after removing the ignition coil. New injector seals should be fitted and a bit of engine oil on them helps to refit to the engine.

- disconnect the wiring connectors and unclip the harness and move it out of the way

- disconnect the vacuum servo pipe and purge valve pipe

- depress the release button and disconnect the fuel pipe

- where needed, undo the bolts and remove the manifold underside support bracket

- undo the manifold retaining nuts, remove the manifold again recover the 4 seals - new ones should be used on refitting.

 

Whilst the manifold is off, give the throttle body/plate a good clean with carb cleaner to help tickover.

thanks for the quick reply , .decided to have a go before seeing your post ,

 loosened everything connected to inlet manifold when it was loose realized i could not just pull it off ,

i don't know if its the injectors that are in the way ,

have decided to give it to a mechanic  looks too big a job for me

by the way the reason i want to replace the inlet manifold ,

the plastic bit that is part of the manifold that the servo connects to is damaged

a mechanic has glued the damaged bit it on , but i'm not happy about driving a car that has that type of repair ,i think it is dangerous

[crooner]

(New injector seals should be fitted and a bit of engine oil on them helps to refit to the engine.)

 

just curious does the injectors come away with the rail when you lift it out,

are the seals stuck in the bottom of the injector hole ,does that give you a problem getting them out 

what purpose does the engine oil have,

think i could tackle this job ,but need to understand the injector side of things

[paul.h]

From Haynes, the injectors are removed still fastened to the fuel rail, the oil on the seals probably helps them slide in to place and the seals are on the bottom of the injectors. The seals at the top of the injectors only need replacing if the injectors are unclipped from the rail. The fuel rail is held down by bolts and it says to unclip the fuel hose to it. It would pay to put something in the end of the hose to stop dirt getting in. Obvious thing with petrol, not to smoke or any other ignition sources until any that sprays out evaporates.

[crooner]

From Haynes, the injectors are removed still fastened to the fuel rail, the oil on the seals probably helps them slide in to place and the seals are on the bottom of the injectors. The seals at the top of the injectors only need replacing if the injectors are unclipped from the rail. The fuel rail is held down by bolts and it says to unclip the fuel hose to it. It would pay to put something in the end of the hose to stop dirt getting in. Obvious thing with petrol, not to smoke or any other ignition sources until any that sprays out evaporates.

 

so as i am only wanting access to remove the inlet manifold ,

can i simply pull fuel rail with injectors attached put aside to change manifold , then put rail / injectors back without bothering about the seals

does this seem okay

[paul.h]

I have not done this job, but you probably could. Have a look at the seals though to see if they look ok. Then if there are any problems later, replace the seals.