| C4 - DS4 Owners :: Forums :: Citroen C4 Picasso and Grand C4 Picasso (B78) 2013 onward :: C4 Picasso and Grand C4 Picasso (B78) Problems and Issues |
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Suck oil out |
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DeuxChevaux
 
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   Member No: #16472
Joined: Nov 21 2010Location: North Norfolk UK |
BigJohnD wrote ... DeuxChevaux wrote ... BigJohnD wrote ... Actually, oil removal by suction is not recommended on diesel engines by Citroën. - Click Here - Hi John - who is the author of that documnet, do you know? The document is from Citroën. It's a page from service guidance to dealers. - Click Here - This was posted by Phil who is a Citroen technician. Thank you for your reply John. I can only assume that the suction method if not properly done fails to remove all the oil - just as draining the oil via the sump plug in its recessed position also fails to do so. When I owned this car I did contemplate fitting another sump plug in the lowest part of the sump. There was even a video where some individuals pulled the recess down to make a flat sump. I always changed the oil at 9k miles and when the EGR failed (electrical fault) at about 135k it was perfectly clean inside. I fully agree with regular oil changes using the correct oils (and filters). I was just mystified by the insruction not to use suction methods. Thank you |
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BigJohnD
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  Member No: #82
Joined: Jan 22 2007Location: Hoylake |
The DV6 sump capacity is small so even a small amount of used oil is a large percentage. Dirty oil can clog the valves and turbo. The best solution is more frequent oil changes, and the use of flushing oils with detergents. - Click Here - |
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vexorg
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 Member No: #48843
Joined: Jul 06 2017Location: Scotland |
Was changing the oil on mine yesterday. The DW10 engine looks to be pretty well designed for draining oil from the sump: Plus it takes a full 5 litres on an oil change, so less percentage of old oil left. |
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BigJohnD
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Member No: #82
Joined: Jan 22 2007Location: Hoylake |
vexorg wrote ... Was changing the oil on mine yesterday. The DW10 engine looks to be pretty well designed for draining oil from the sump: Plus it takes a full 5 litres on an oil change, so less percentage of old oil left. That'll be the 2.0 litre diesel. The service advice only applied to the DV6 1.6 litre HDi. |
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vexorg
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Member No: #48843
Joined: Jul 06 2017Location: Scotland |
The OP didn't specify which engine they had | ||||
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DeuxChevaux
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Member No: #16472
Joined: Nov 21 2010Location: North Norfolk UK |
I'll have to post a picture of my 2.0l hdi sump next time - a massive difference to yours David. It's plastic, has a 1/4 turn plastic sump plug and if you open it with the recomended 0w Ineo first oil its like water comming out! A positive waterfall with force! I've found it difficult to control so have a shaped 12 litre bucket which I can put very close to the sump before releasing the deluge - got soaked in black oil first time  And - I think the 1.6hdi sump is a badly designed piece of ******* |
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BigJohnD
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Member No: #82
Joined: Jan 22 2007Location: Hoylake |
DeuxChevaux wrote ... And - I think the 1.6hdi sump is a badly designed piece of ******* IIRC, it was a joint design between PSA, Ford, Mazda, FIAT and BMW/Mini. The brief was a small, reliable and efficient 1.6 diesel. It does require frequent servicing as a result though. |
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DeuxChevaux
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Member No: #16472
Joined: Nov 21 2010Location: North Norfolk UK |
It's a pity BigJohnD that they recessed the sump plug which meant 0.5 litres at least of dirty oil left in the sump with only just over 3l of new oil going in. When you look at other engines with sump plugs on the curved corner of the sump it would have been a much better solution. The engine itself was brilliant in itself, such a pity this one thing caused so many other issues needlessly. | ||||
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vexorg
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Member No: #48843
Joined: Jul 06 2017Location: Scotland |
If you service any engine it will be more reliable. I think poor design is caused by loss of knowledge as older people retire, young engineers make the same errors of 30 years before. I know that's the same in our industry (high voltage equipment) |
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Westentertainer
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 Member No: #54545
Joined: Sep 03 2019Location: South wales |
thanks for all your input. much appreciated | ||||
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vbru2039
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  Member No: #58461
Joined: Jul 11 2021Location: UK |
I would buy a new sump, they cost around £20-£20 - Click Here - | ||||
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vexorg
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Member No: #48843
Joined: Jul 06 2017Location: Scotland |
Who should buy a new sump, and why? | ||||
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DeuxChevaux
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Member No: #16472
Joined: Nov 21 2010Location: North Norfolk UK |
Must say I am mystified by the sugestion to buy a new sump - does not fix any issues with the old one. Go on vbru2039 - tell us why! We are all waiting. | ||||
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