Jump to content


Photo

1.6 Hdi low oil pressure warning


  • Please log in to reply
6 replies to this topic

#1 discv

discv

    1.8 HDI Exclusive

  • Members
  • PipPipPipPip
  • 848 posts
  • Gender:Male
  • Location:London UK

Posted 03 September 2017 - 04:02 PM

Thought it might be useful to share my findings as they come to light.

To recap- having recently bought this car it drove for a month with no sign of any problems, till the low oil pressure came up.

 

The main thing I have learnt to date is that I should have lifted the plastic engine cover and shone a torch around the base of the injectors. I would have seen seeping engine oil, some still liquid and some baked solid. This is a cast iron guarantee that the problems I have since found are sitting there.

 

I am still dismantling- but have uncovered;

 

On removing the sump the oil pickup/strainer was badly blocked up. The pickup had to be cut off because the torx screws are too small and cannot cope with the locktite used in assembly. I was lucky and with mole grips managed to ease the screws out- but I'm sure they were on the point of shearing.

 

By this stage I had seen evidence of the full service history of this 66k mile car. The quality of work carried out by main stealers and independants alike was/is nothing short of criminal.

 

Next stage was to strip and inspect the turbo. It is serviceable.

 

The injectors are out. All have the top oil seal totally disintegrated. All have the bottom copper seal blowing by. One so badly I'm not sure the bottom seal remains.

 

I have no choice now but to lift the head. If there is any chance of this lump running again the head will have to be cleaned and kissed by an engineering outfit, but I'm not sure that any remain round here.

 

The only good news is that I have not spent a penny yet. Many hours of sweat and toil though- and still a long way to go.


  • gray likes this

C4 Grand Picasso 1.6 HDi 16V FAP/DPFS 110, -Auto (DV6 - 80kW) (C4) (DT) (2006-2008)


#2 ChrisGibbard

ChrisGibbard

    1.8 HDI Exclusive

  • Members
  • PipPipPipPip
  • 489 posts
  • Gender:Male
  • Location:Alton, Hampshire

Posted 05 September 2017 - 10:10 PM

Mate, are you sure this has only done 66k, because it doesn't sound like it has!



#3 discv

discv

    1.8 HDI Exclusive

  • Members
  • PipPipPipPip
  • 848 posts
  • Gender:Male
  • Location:London UK

Posted 06 September 2017 - 11:03 AM

Mate, are you sure this has only done 66k, because it doesn't sound like it has!

I agree it sounds odd- but it all checked out with a paid for full history check.

As I pick my way into this engine it is apparent that I have inherited the combination of disgraceful work by 'mechanics', and an engineering design that does not have any tolerance.

By that I mean that every nut, bolt and stud has been selected at an absolute minimum specification. The result is that a single failure, in this case 1 or 2 copper sealing washers, will have a domino affect through the whole unit.


C4 Grand Picasso 1.6 HDi 16V FAP/DPFS 110, -Auto (DV6 - 80kW) (C4) (DT) (2006-2008)


#4 discv

discv

    1.8 HDI Exclusive

  • Members
  • PipPipPipPip
  • 848 posts
  • Gender:Male
  • Location:London UK

Posted 06 September 2017 - 11:43 AM

Just as an example of the standard of workmanship, I investigated a noise coming from the steering.

The car had a front spring replaced by Kwik Fit shortly before I bought it.

 

 

 

[attachment=16916:spring grab.tiff]

 

Item 3, the housing in which the front spring locates- was completely missing.


C4 Grand Picasso 1.6 HDi 16V FAP/DPFS 110, -Auto (DV6 - 80kW) (C4) (DT) (2006-2008)


#5 ChrisGibbard

ChrisGibbard

    1.8 HDI Exclusive

  • Members
  • PipPipPipPip
  • 489 posts
  • Gender:Male
  • Location:Alton, Hampshire

Posted 06 September 2017 - 03:08 PM

You can't get better than a Kwik-Fit fitter !!!!!!!!!!!!!!!

 



#6 discv

discv

    1.8 HDI Exclusive

  • Members
  • PipPipPipPip
  • 848 posts
  • Gender:Male
  • Location:London UK

Posted 02 October 2017 - 04:48 PM

A progress report that may be of interest to 1.6 Hdi 16v owners/buyers.

 

It's been slow going- this engine type should never have left the drawing board. It has zero redundancy built in.

 

The hard carbon grains in the oil have also destroyed the cams and cam carrier rack. The cam bearings are machine directly into the cam carrier- so no form of repair is possible.

 

But what I have learnt is that all the signs were there from square one.

 

As we know, the problem starts with leaking copper injector seals. The hot gases then destroy the rubber seals at the top of the injector. Without this seal in place and doing its job, this is the point at which the hot gas and oil meet up. Some of the carbon remains around the base of the injector- and can easily be seen by removing the plastic engine cover.

(If you do see hardened carbon deposits- walk,  no run.) And some of the smaller carbon bits mix with oil and drain back into the engine.

 

I'm reaching a critical decision point. On a 'normal' engine I would now be having a look at big end/main shells etc. In this case that option is risky- the shells have no locating 'pips'

and without the engine being on a machine shop bench and the necessary special tools to hand, there is a good chance that a con rod will come through the crank case.

 

 


C4 Grand Picasso 1.6 HDi 16V FAP/DPFS 110, -Auto (DV6 - 80kW) (C4) (DT) (2006-2008)


#7 discv

discv

    1.8 HDI Exclusive

  • Members
  • PipPipPipPip
  • 848 posts
  • Gender:Male
  • Location:London UK

Posted 27 April 2018 - 11:19 AM

A progress report.

The head came back from the machine shop, but careful inspection showed that the injector seats were not as pretty as I would have liked. So I got a cheap seat cutting set off ebay- and all is now looking good.

 

Haynes caused me major problems. They state that the injector pump and its various brackets need to be removed to get the head on/off.

With the engine in situ this is a major task- and completely false information. The head separates from the pump assy. by removing 2x M6 bolts and 1x 13mm nut and its M8 stud.

This I proved by refitting the pump and brackets prior to dropping the head on.

 

The cams and cam carrier have been stripped, inspected and refitted. The injectors are back in place with all new fixings, seals, copper seating washers etc.

 

Next stop (when the weather allows) is cam belt and pulleys. Then I should be able to spin on the starter to confirm oil pressure ^_^


C4 Grand Picasso 1.6 HDi 16V FAP/DPFS 110, -Auto (DV6 - 80kW) (C4) (DT) (2006-2008)