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[Big_Al]

Just my views .. but you don't need to take the whole plenum off .. but you do need to take the black central bit off.. the part that the breather pipes connect to. This needs cleaning out as it has some very small pipeways in it ..

My view as well      maintenance guide shows how black breather bridge comes off 

[amba]

Unless I am missing something here,you can,t remove the black breather box from the plenum chamber without releasing the throttle bodies from the front of the plenum.

This then requires the plenum to be released so you can undo the 4 bolts holding the throttle body to plenum then you can pull the breather away.

[robson]

Thanks Entwood I thought that was the case. So its the plenum black cover off clean pipes in the cover and the 4 pipes out of the cover and the breather box?

[GastronomicKleptomaniac]

Unless I am missing something here,you can,t remove the black breather box from the plenum chamber without releasing the throttle bodies from the front of the plenum.

This then requires the plenum to be released so you can undo the 4 bolts holding the throttle body to plenum then you can pull the breather away.

You pop the top "Ecotec" cover off, this reveals the third of 3 Torx bolts to undo - the box then slides (gently) backwards out of the throttle body.

[Big_Al]

Unless I am missing something here,you can,t remove the black breather box from the plenum chamber without releasing the throttle bodies from the front of the plenum.

This then requires the plenum to be released so you can undo the 4 bolts holding the throttle body to plenum then you can pull the breather away.

You pop the top "Ecotec" cover off, this reveals the third of 3 Torx bolts to undo - the box then slides (gently) backwards out of the throttle body.

Was fairly  sure that I had removed it that way before   

[amba]

Doudt it would just slide backwards as you need to lift it clear of the circular section in the plenum that has the funny gasket seal .As the 2 ends of the breather box are a tight fit into the throttle body they need to be at an angle to pull clear..if my memory serves me correctly.

Not saying the breather can,t be removed but would be a struggle.

[robson]

There seems to be a lot of disagreement on this subject can anyone give a definitive answer before I start this job

[GastronomicKleptomaniac]

There seems to be a lot of disagreement on this subject can anyone give a definitive answer before I start this job

Throttle body categorically does not need to come off. The central black box is in two sections, they'll most likely come out together.

[albitz]

two sections on your car,but not on all V 6,s.

[amba]

Clip off the black " Eco" cover to reveal breather chamber fixing.With this undone it is only possible to pull the breather chamber away from the plenum with either the throttle bodies removed or atleast loosened enough to allow for the 2 tubes cleared from the throttle body.

If it is possible to do this any other way I have not found it yet,but am always willing to learn.

[martin42]

I havnt undone throttle body to remove breather,just lift it up to clear the hole and gently wiggle it free

[amba]

Sure the angle it would need to be lifted to clear the center chamber would mean you cant pull the tubes free from the throttle body.

Well that is what I found the first time I tried that (several years ago) and ever since I have always removed the 4 bolts from the plenum chamber to allow access to the  4 throttle body bolts which then get undone  then the breather chamber comes off without any problems .

[GastronomicKleptomaniac]

two sections on your car,but not on all V 6,s.

Every day is a schoolday

[amba]

Possibly it can be removed with ease on the longer breather bodied models..3.0/3.2... but as mine is a 2.5 with just the shorter single section breather chamber that is why I have always had to remove or atleast undo the plenum and throttle dobies to get it apart ?

[TheBoy]

To clarify the plenum bit...

Early 3.0 and all 2.5 have the shorter plenum. You cannot get the breather system above the plenum off without taking off the throttle bodies

Later 3.0 and all 2.6/3.2 have the longer plenum, and the breather system can come off without taking off throttle bodies.  Though, TBH, ideally they need to come off to clean them.


I clean my breathers annually, and tend to change the oil every 3k