C4 HDI 1.6 engine rebuild.

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Allmostfrench
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C4 HDI 1.6 engine rebuild.

Post by Allmostfrench »

G'Day Folks,
I'm looking at saving my Xantia V6 for "Best" by not slogging it back and forth to work.
I have been offered an immaculate C4 HDI 1.6 EGS for a nominal sum with an engine that has failed due to the dreaded oil starvation.
Bear in mind that cars in Horses Traylia don't have rust issues, so the rest of the car is like new.
The car will be used for open road country driving.
Has anyone successfully rebuilt one of the engines without spending an absolute fortune?
The VIN is VF7**************[VIN obfuscated, can be read by forum staff] and the engine # is JBAJ3018283.
Is this a "DPF" or "FAP" engine?

I'm happy to spend the money on a new turbo etc if required.
I would be using the correct oil changed every 10,000km (6000 miles).

Thanks in advance, you've all been very helpful with my Xantia queries (which is running great now).
Chris.
Last edited by GiveMeABreak on 22 Jan 2021, 10:03, edited 1 time in total.
Reason: Corrected VIN (insufficient length)

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xantia_v6
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Re: C4 HDI 1.6 engine rebuild.

Post by xantia_v6 »

I thought that the oil starvation was only to the turbocharger, making repair fairly easy?

Allmostfrench
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Re: C4 HDI 1.6 engine rebuild.

Post by Allmostfrench »

I wish........
I'm told that it has done its crank bearings.
It may not be too bad, or it might be 'orrible!
My understanding is that "a mechanic" dropped the sump to find the oil pickup blocked.
The car is a local, two owner car and has not been thrashed, but there are lengthy gaps in the service intervals, together with probably not using the specified oil.
I think I'll give it a shot as a learning experience into the wonderful world of common rail. The entry price will be low, just as long as I can get some decent use out of it.
Thanks for the quick reply, are you currently over in unzud?

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GiveMeABreak
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Re: C4 HDI 1.6 engine rebuild.

Post by GiveMeABreak »

This is a DV6TED4 engine and is the 110 Bhp with a particle filter (DPF). FAP means the same in French.

As for the oil issue, see my post in the link below with pictures. If the oil / sludge / carbon contamination has already caused damage internally then it will likely still be there and will continue to do so (see the pictures). This is one reason why people that have replaced the turbos find the new ones soon become damaged within a short time as more of the deposits work their way through the system. The only way to know the severity of the contamination is to take it apart unfortunately.

Although there was an 'improved' turbo banjo bolt, this could still become blocked if the internal contamination was bad enough, Secondly, if the filter form the banjo bolt was removed as some have done to reduce blockages, then as the oil sludge becomes carbonised, any large deposits can still cause damage to the turbo without the filter.

viewtopic.php?p=650153#p650153

Allmostfrench
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Re: C4 HDI 1.6 engine rebuild.

Post by Allmostfrench »

Thanks Marc,
It will have to come apart completely and be VERY carefully cleaned, methinks.
I guess a caustic bath is the answer here.

discv
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Re: C4 HDI 1.6 engine rebuild.

Post by discv »

Been there- got the T shirt! And yes the job can be done at a reasonable cost.
Stage 1- spend no money. Very carefully get the whole thing apart. Trust me- photograph every detail, mark and bag every nut bolt and washer.
Bear in mind that if the crank is shot then the lump has to come out. Note this well if the bearing caps are removed they have to be refitted using a special procedure, which if not followed tends to put con rods out through the block!

Once it's all apart you will then be able to judge the damage. I assume it blew the turbo, so there could be damage to piston crowns, combustion chambers, valves/seats,
oil pump, vacuum pump etc.

This first stage will cost you nothing but time, but is time well spent to put you in a place to make the best calls.

Edit- I forgot to mention the cause of low oil pressure problem- it is the little copper sealing washers that go between the injectors and their seats in the head. These fail and allow hot gases to find their way to mix with engine oil. This causes the formation carbon solids that block up oilways etc.

Allmostfrench
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Re: C4 HDI 1.6 engine rebuild.

Post by Allmostfrench »

Thanks, discv!
I'll give it a (careful) shot.
It just seems such a shame to trash a nice, useful car for the sake of someone's lack of maintenance and some design flaws. (Climbs down off soap box....)
There's bound to be more questions, thanks everyone for your interest and help.
These are rare cars in Australia, and knowhow is thin on the ground.

discv
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Re: C4 HDI 1.6 engine rebuild.

Post by discv »

I will keep an eye on your progress and chip in as required. Bear in mind that this engine was widely used by a variety of manufacturers- some of which might have sold in your neck of the woods. During my rebuild I sourced cheap used parts from Volvo, Ford etc etc.

Allmostfrench
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Re: C4 HDI 1.6 engine rebuild.

Post by Allmostfrench »

Thanks!
I will be sourcing my parts from Blighty for the most part as I'm not in a screaming rush.
I have dealt with Euro Car Care before, and they were very helpful.
Any other suggestions?

Hell Razor5543
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Re: C4 HDI 1.6 engine rebuild.

Post by Hell Razor5543 »

Don't get them confused with Euro Car Parts! ECP have the deserved nickname of Euro Crap Parts.

discv
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Re: C4 HDI 1.6 engine rebuild.

Post by discv »

From bitter experience, stick to genuine for critical items- such as oil seals, sealing washers etc.
But remember that 'genuine' does not have to mean paying Main Stealer prices. 'OEM' is the buzz word.
As an example on my 1.6 Hdi rebuild, I was able to identify the manufacturer of the original head gasket- and then source the identical item as supplied by Citroen- but at half the price.
Another example is cam belt/water pump kit. The Gates kit is exactly the same compilation as can be bought from Citroen- but again half the price.
More precise details once you have a shopping list!