new addition to fleet

[citroenxm]

The 1.6 hdi 16v DV6 engine suffers BUT this is down too a poor injector clamp design, in which they slaken off then soot works up the injectors and passes the oil seals at the top of the injectors and gets into the oil... I guess the oil seals shrink or go brittle and loose seal effectness...

[Stickyfinger]

new owner of a C5 X7 - a wihte auto 2.0 HDI 160HP..

but of course it is broken.. how broke remains to be seen..
The car suffered fomr low oil pressure with the previous owner

I've been noticing how cheap you can pick up x7's with knackered engines on eBay, too - ridiculously cheap. It's very tempting.

If it's not a daft question, what is it causing the 160hp engines to die ? Are they all (mostly) low oil pressure deaths - if so, what - specifically - is causing the low oil pressure ? Pump failure ?

Mainly owners

[jgra1]

thanks for all messages folks appreciate them.. my 50 cents worth of ramble follows

Some things I noticed about getting the new x7, that are in no way relevant but.. coincidences maybe.
It came from Scotland, Thursday, the day before the Forth bridge got shut.. it then stayed overnight - and left the Scottish Borders - about a day before record rainfall/flooding there ! and the other one later.

Went back to car today, back underneath and attempted again to remove the upper part of the sump (there is a sump pan and then an alloy sandwich above this), the alloy part hinders oil pump removal somewhat..
with these two pieces off, I then removed oil pump.. one of the farm dogs decided to lie under car with me and carefully watch everything I was doing.. no pic of him
pic below..

What I think? I have recently learn't about the 160 engine is: .. it is just a remapped 140, it is used in Volvo, Ford and PSA cars at least.. PSA may have recalled the engine for an oil pump issue.. This car probably never got recalled..I haven't found out yet..
there is a case online about a C5 160 that had an oil pump fail.. one of the pump vanes got stuck..



the crack is visible at 1 o'clock.. the pump no longer turns, the sprocket and shaft do but the rest is stationary.. the vane is quite stuck where it rests.. (I did free it later with long nose pliers)

I took one of the big end caps off.. shown here.. I don't know how bad it looks.... I didn't feel heavy scoring.. the car is 105K miles and this shell looks sort of right for that.. opinions very welcome on this



so... maybe this is the problem, maybe this is the reason for the recall.. maybe maybe..

the other point I was going to make.. the old blue C5 that has been so reliable for 3 and a 1/2 years , started to show coolant low warning signs (2 days afer adding a litre or so), and tonight leaving the farm they were back.. just maybe this car has a developing issue one hour after finding the oil pump problem in 'whitie' ..maybe :O

John

[citroenxm]

the 2.0 hdi is not DIRECTLY used in Ford, the blocks are the same but apparently Ford use their own head, or a least fuel system. Its not a direct lift n drop like the 1.6 HDi DV6 which is identical across ford, volvo, mazda and PSA... This is what I have read on various Diesel Publications etc.. If you listen a Mondeo is a bit more louder and noiser then a PSA install.

But to confuse matters more, my brother has bought a 4x4 Kuga 2,0 TDCI, and it has got the C5 2.0 HDi layout, identically! Even the Ford fuel filter has PSA badge on the filter house!!!

[CitroJim]

That's an interesting pump failure John!

So, a new pump and new shells and she should be good again then

[bobins]

PSA may have recalled the engine for an oil pump issue.. This car probably never got recalled..I haven't found out yet..
there is a case online about a C5 160 that had an oil pump fail.. one of the pump vanes got stuck..
John

ISTR there was a recall to cure spurious 'low oil pressure' warnings. I think they were caused by heavy braking and other such manoeuvres ! I think the cure was merely an ECU bodge

[vborovic]

The 163 BHP engine can't be the same as the 140 version, since by only doing the remap as proposed wouldn't clear the Euro V requirement ... PSA aren't going the VW route on their engines ...

[jgra1]

Thanks for corrections all

I don't want to replace shells.. at this stage... for the sake of a couple of hours work under ramps in future and a tube of sealant I would rather leave them alone and see how she runs..

Thoughts guys?. am I being silly.. the shell pictured doesn't look that bad to me for the distance the car has covered..

[Gibbo2286]

Thanks for corrections all

I don't want to replace shells.. at this stage... for the sake of a couple of hours work under ramps in future and a tube of sealant I would rather leave them alone and see how she runs..

Thoughts guys?. am I being silly.. the shell pictured doesn't look that bad to me for the distance the car has covered..

Measure the crankshaft, if it's crankpins and journals are within tolerance i.e. not ridged, undersize or oval fit new shells, I think you will find the con rods have different material in the shells for top and bottom and it's possible that only the top ones will show signs of wear.

[jgra1]

Yikes ..thanks gibbo

You seem to be saying fit new shells or if the engine is out of limits it's junk.. you think the shell in the photo looks pretty bad?

The crank pin i exposed was perfectly smooth and mirrored..

Hmm

The post may have gone a bit off course .. I have found the obvious cause of the low oil pressure.. and I can't see as yet any obvious swarf or damage to/ within engine.. to me the shell in the pic looks used - but ok.. if it was beyond repair I can only assume the material would have found its way around the rest of engine and destroyed it ..

My odd logic suggests replacing the oil pump, see if car starts and runs, change the oil after 30-60 mins, change filter and add fancy new oil in and enjoy driving ....

[Old-Guy]

I too would be inclined to put the shells back if they look and feel 'good' (I can't see your photos for some reason). I'd expect re-usable shells to only show polishing and slight wear. I would definitely replace all of either set of shells (big-ends; mains) if any in that set showed signs of the bearing surface having 'picked-up' - the bearing material smearing slightly. I'd also want to check each big-end for any radial play around TDC and BDC. I wouldn't want to see any signs of real wear on any of the crank-shaft journals, just well-polished.

The crank pin i exposed was perfectly smooth and mirrored...

Check 'em all, one at a time, and don't forget to torque them all up together once you've checked the last! If all the crank pins are like that then the worst would be a new pump and a set of shells.

Best of luck.

[jgra1]

thanks Old guy.. shell shows some polishing to the centre area, no other wear. no evidence of anything else foreign ..to me it looks completely fine..
sorry you cant see pic..

J

[old-un77]

long ago when working in the fork lift game a forklift suffered a punctured sump.....

on rebuilding, oil levels etc ok...........it lasted about an hour, before it seized, 2nd re build, another seize...........3rd rebuild it was noticed that the strainer tube was bent, sufficient to cause , on acceleration and deceleration, (you know what forklift drivers are like.) oil feed starvation....
Bob

[CitroJim]

I'd invest in a test oil pressure gauge John

[jgra1]

what I am saying is... if the shells are bad, then the rest of the engine will surely die, so I may as well not replace the shells. this week...
does that make any sense..