1.6 Hdi / DV4 / DV6 turbo feed modification.

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Bob L'eponge
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1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by Bob L'eponge »

Most on here will have read how the turbo bearings on the 1.6 Hdi engine can fail if the correct fully synthetic oil is not used and changed regularly. This is usually due to carbon deposits in the oil blocking the small 'integral strainer filter' fitted to the lower banjo bolt which feeds oil to the turbo, so causing the turbo bearings to be starved of oil. At one point the Citroen servicing documentation advised that this small strainer be removed with a screwdriver 'if fitted' during servicing. Problem with this is that, whilst it might remove the risk of the turbo being starved of oil, small particles of carbon could be pumped directly to the turbo bearings, causing damage in any case.

I have noticed that the most recent version of ServiceBox now contains a technical note relating to the 'Replacement of the lower banjo bolt on the turbocharger lubricating pipe with a banjo bolt that has a removable, larger-capacity, strainer filter.' The illustration provided does not seem to apply to all models, but if you order this modified banjo bolt (part number 0376 60) it does come with a modified filter element that runs the whole length of the interior of the bolt, so increasing the surface area and reducing the possibility of blockage whilst also filtering out particles of carbon before they can reach the turbo.

It looks as though this is a worthwhile modification that should really be done even if you are not removing the turbo oil feed pipe for some reason.

Alternatively, just use the right oil and change it frequently, so avoiding the risk of carbon particles getting into the oil in the first place!

Hope someone finds this useful!
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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by demag »

Err yes I will. Mine is waiting for a turbo to be fitted right now.

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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by Lighty »

A large dealer sought my advice on this recently, and despite me telling them to remove the filter, they decided that the modified pipe would cure the oil feed issue.
The new turbo lasted 3 months. It is now running again with no filter, 6 months on and no issues.
We change one or two turbos a week on this engine, and have NO comebacks with filter removed.
The previously mentioned car did not appear to have any "Grit" in the oil, unlike quite a few that we do.
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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by RichardW »

Lighty - is it worth removing the filter on a (currently!) good running unit?
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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by demag »

Whether Citroen do it or my Indie mine will be removed. I need this car to keep going.


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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by Stickyfinger »

Do you have to remove the sump [?] as well or is it to just remove the oil feed and replace with (the modified) new parts/or clean the existing feed pipe ?
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Post by addo »

The pipe bolts on externally. Some of the exhaust gets in the road, however.

You may recall Lighty's C5 sump photos from a failed 1.6 - real horror shots.
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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by Peter.N. »

We never used to have filters in turbo feeds and they didn't give any trouble, as the turbo is being fed with oil that's just been through the main filter I can't really see how the carbon gets into it.

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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by RichardW »

Injector blow by, very small sump capacity, EGR valve and long service intervals.... :?
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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by uncle buck »

A sump modification on this engine would be a good idea....a drain hole that was bigger and not recessed up into the sump so you could get all of the old oil out would go a long way in helping this engine out in my opinion.

The engines that have a DPF fitted seem to have a lot more problems than the version with no DPF.


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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by Peter.N. »

RichardW wrote:Injector blow by, very small sump capacity, EGR valve and long service intervals.... :?
Yes but how does it get past the filter?
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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by uncle buck »

The standard oil filter is a full flow filter, I believe it will remove particles down to about 30 microns so some will get through.


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Post by Stickyfinger »

addo wrote:The pipe bolts on externally. Some of the exhaust gets in the road, however.

You may recall Lighty's C5 sump photos from a failed 1.6 - real horror shots.
I do recall those images.....hence my concern

??....To change/clean the Oil Feed ? Do you need to remove the exhaust ?, if so, is it a good time to remove the EGR and clean that as well...and if that is the case is it a good time to Jet Wash Out the FAPs filter <(I do not intend to remove it)

??..To Clean the SUMP and the Oil Pick Up....What is the procedure to remove the Sump Pan? is it as per the P[H]ains workshop book ?

?? Aporox garage time for this work ?

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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by Bob L'eponge »

uncle buck wrote:The standard oil filter is a full flow filter, I believe it will remove particles down to about 30 microns so some will get through.
But the 'strainer' in the turbo oil feed banjo is just a wire mesh, so it won't stop anything that has already got past the oil filter.
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Re: 1.6 Hdi / DV4 / DV6 turbo feed modification.

Post by Bob L'eponge »

uncle buck wrote:A sump modification on this engine would be a good idea....a drain hole that was bigger and not recessed up into the sump so you could get all of the old oil out would go a long way in helping this engine out in my opinion.
The boss that holds the sump plug has a hole drilled though it so all the oil can escape - assuming that it doesn't become blocked of course. :wink:
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