CALLING ALL DS3 OWNERS WITH THE THP ENGINE !!!....Who's had new engines ??

[Czar]

It's not that I don't believe you, I just am curious as to IF what Citroen say is fact, then where and how did you purchase such a component, and how did you re-configure the pressure settings for the standard fuel injectors ?

[Dave Clarke]

It's not that I don't believe you, I just am curious as to IF what Citroen say is fact, then where and how did you purchase such a component, and how did you re-configure the pressure settings for the standard fuel injectors ?

I got paperwork, will scan it later on if I can, and i'm running JCW injectors.

[Czar]

I got paperwork, will scan it later on if I can, and i'm running JCW injectors.

Thank you, I look forward to reading the paperwork, on a further note, the BMW MINI JCW fuel injectors are no different, to the ones supplied to either Peugeot or indeed Citroen, they are the Bosch HDEV 5.1

[Dave Clarke]

Thank you, I look forward to reading the paperwork, on a further note, the BMW MINI JCW fuel injectors are no different, to the ones supplied to either Peugeot or indeed Citroen, they are the Bosch HDEV 5.1

I got them with the turbo and assumed they were higher flow so fitted them and reset the ECU.

[gar074]

Yeah, like this at 3 secs

Yep, that's it.

That's mine f*cked good & proper, then.

Might get a new engine this time, with any luck.

[Dave Clarke]

Yep, that's it.

That's mine f*cked good & proper, then.

Might get a new engine this time, with any luck.

Yeah, the dealers only strip down and take photo's, they can't machine bits and change pistons afaik. A new crate engine should fix it, and it should have the 4-way PCV instead of the old "dump it all into cyl 1" rear PCV arrangement.

[Czar]

Yeah, the dealers only strip down and take photo's, they can't machine bits and change pistons afaik. A new crate engine should fix it, and it should have the 4-way PCV instead of the old "dump it all into cyl 1" rear PCV arrangement.

Can you enlighten me/us more on this 4 way PCV, and just how the old PCV line dumps all the crankcase oil mist vapour into cylinder No1 please ?

[Dave Clarke]

Can you enlighten me/us more on this 4 way PCV, and just how the old PCV line dumps all the crankcase oil mist vapour into cylinder No1 please ?

From Nov 2011, THP 155's and 200's spread the rear PCV, via the inlet manifold to all 4 combustion chambers, and before it only went into cylinder 1, hence a lot of lunched no1 pistons/rings causing failure.
The PCV system is only active on part throttle, so positive inlet pressure, so driving the car easier is more detrimental to it's longevity with the original PCV setup.

[Clarky]

Any one got a picture of a 4-way PCV mod compaired to OLD PCV set up... would like to see if my replacement engine has the new mod ??.

[Dave Clarke]

Any one got a picture of a 4-way PCV mod compaired to OLD PCV set up... would like to see if my replacement engine has the new mod ??.

Courtesy of Cyclone

[Czar]

From Nov 2011, THP 155's and 200's spread the rear PCV, via the inlet manifold to all 4 combustion chambers, and before it only went into cylinder 1, hence a lot of lunched no1 pistons/rings causing failure.
The PCV system is only active on part throttle, so positive inlet pressure, so driving the car easier is more detrimental to it's longevity with the original PCV setup.

Courtesy of Cyclone

[ATTACH=CONFIG]3679[/ATTACH]

So I take it that the above ^^^ image of the inlet manifold with that PCV distribution arrangement, is now factory standard on the Citroens ?

As for your explanation regarding the rear PCV line from the cam cover to inlet manifold, feeding the crankcase oil mist vapours into cylinder No1 is wrong, the feed into the inlet manifold is central for equal distribution to all cylinders, and not dedicated to one as you thought!

This image is of the inlet manifold internal PCV feed line, showing central location into the bottom of the plenum.

[Clarky]

Is it possible to tell visually compairing the new mod.

Thanks Clarky.

[cyclone]

So I take it that the above ^^^ image of the inlet manifold with that PCV distribution arrangement, is now factory standard on the Citroens ?

As for your explanation regarding the rear PCV line from the cam cover to inlet manifold, feeding the crankcase oil mist vapours into cylinder No1 is wrong, the feed into the inlet manifold is central for equal distribution to all cylinders, and not dedicated to one as you thought!

This image is of the inlet manifold internal PCV feed line, showing central location into the bottom of the plenum.

If the old style manifold did such a good job equally distributed the PVC Vapour then what what is the reason for the new intake feeding the vapour to each intake runner individually. The redesign money wasn't spent for the fun of it.

Clarky, if you follow the rear PVC line and it attaches to the manifold at a single point on the bottom then it is the older one, if the line branches off into 4 lines(1 to each intake runner) then it is the newer manifold

[Czar]

If the old style manifold did such a good job equally distributed the PVC Vapour then what what is the reason for the new intake feeding the vapour to each intake runner individually. The redesign money wasn't spent for the fun of it.

What new intake design manifold are we talking about, are you referring to this image below ?

[Clarky]

If the old style manifold did such a good job equally distributed the PVC Vapour then what what is the reason for the new intake feeding the vapour to each intake runner individually. The redesign money wasn't spent for the fun of it.

Clarky, if you follow the rear PVC line and it attaches to the manifold at a single point on the bottom then it is the older one, if the line branches off into 4 lines(1 to each intake runner) then it is the newer manifold

Thanks Cyclone will have a look after work hopefully its the newer manifold !!!.