Oil Leak

[lisasherratt]

Hello

I would really appreciate a diagram of the engine and ancillaries for my DS4 2012 as we are trying to locate an oil leak.

Vin no VF7**************[VIN obfuscated, can be read by forum staff]

Many thanks in advance

[GiveMeABreak]

Parts diagrams are too numerous for an oil leak issue at this time, so I've moved your request to the technical section.

First you need to get an idea of where the oil is leaking from using the following - each has its own fault finding procedures. Let me know which (A-F) is the most likely place and we can take it from there:

Click Image to Zoom

Zone "A" Timing face
Zone "B" Upper face
Zone "C" Coupling face
Zone "D" Exhaust face
Zone "E" Lower panel
Zone "F" Inlet face

[lisasherratt]

Apologies I didn't get a notification so didn't know this had happened, thought I'd just failed to actually post the question!

I will work it out and let you know! thank you!

[lisasherratt]

Hi, so if I could have A and D that would be awesome - it's possibly at the corner where the two of those join. Its been really hard to pinpoint and we've tried lots but it doesn't leak wilst stationary, only whilst the car is being driven - has gone through two auxiliary belts so far...

Many thanks!!

[GiveMeABreak]

Ok, there are specific procedure for narrowing this down, so I'll get the onward instructions for zones A and D shortly.

[lisasherratt]

Your help is much appreciated!

[GiveMeABreak]

Ok, so Here's Zone 'A' for now. I'll put up the Zone 'D' tomorrow morning.

Timing Face

Preliminary operations:

• Place the vehicle on a lift
• Remove the engine style cover

Zone	Probability	Component to be checked first	Locating the leak
"G"	Low	Cylinder head cover on cylinder head	Timing face - Stage G1
"H"	Low	sump	Timing face - Stage H

Step G1 - Cylinder head cover on cylinder head

Lisa A12.PNG (92.33 KiB) Viewed 107 times

Sealing - Detachable seal - 12 bolts Probability: Low Possible causes: - Incorrect tightening of the fixing bolts - Defective seal - No seal Access: Easy Repair: Replace the seal

Step G2 - timing chain guide upper fixing bolts

Lisa A13.PNG (101.67 KiB) Viewed 107 times

Sealing: Flat seal removed Probability: Low Possible causes - Incorrect tightening of the fixing bolt - Defective seal - No seal Access: Difficult Repair: Replace the seal and the bolt

N.B.: Do not oil the seal.


Step G3 - Cylinder head on cylinder block

Lisa A14.PNG (90.31 KiB) Viewed 107 times

Sealing: - Detachable seal - 13 bolts Probability: Average Possible causes - Incorrect tightening of the fixing bolts - Faulty cylinder head gasket Access: Difficult Repair: Replace the cylinder head gasket

Step H1 - sump

Lisa H1.PNG (102.21 KiB) Viewed 107 times

Sealing: - Seal applied of silicon type - 16 bolts Probability: Low Possible causes - Incorrect tightening of the fixing bolts - Discontinuity of the sealing bead Access: Easy Repair: Repair of the sealing of the area using an approved product

Step H2 - Lower fixing bolts of the timing chain guides

Lisa H2.PNG (114.67 KiB) Viewed 107 times

Sealing: Detachable O-ring seal Probability: Low Possible causes - Incorrect tightening of the plug - Absence of seal - Defective seal Access: Difficult Repair: Replace the bolt (Including the seal)

Step H3 - Oil core cap

lisa H3.PNG (112.95 KiB) Viewed 107 times

Sealing: Force-fitted cap and sealing paste Probability: Low Possible causes - Cap shape fault - Absence of sealing paste Access: Difficult Repair: Replace the cylinder block

Step H4 - Crankshaft main bearing casing on cylinder block

Lisa H4.PNG (125.11 KiB) Viewed 107 times

Sealing: Seal applied of silicon type Probability: Low Possible causes - Incorrect tightening of the fixing bolts - Discontinuity of the bead of silicon Access: Difficult Repair: - Check the tightening torques - Redo the sealing of the crankshaft main bearing casing on the cylinder block, using an approved product

Step H5 - Crankshaft

Lisa H5.PNG (115.55 KiB) Viewed 107 times

Sealing: Dynamic seal Probability: Low Possible causes - Seal damaged - Lip turned over - Routing of the seal Access: Difficult Repair: Replace the dynamic seal

N.B.: Check whether the dynamic seal has been coated, if not, coat the seal when refitting.

[GiveMeABreak]

Zone D - Exhaust Face

Zone	Probability	Component to be checked first	Locating the leak
"M"	Low	Turbocharger lubrication pipe on turbocharger	Exhaust face - Stage M1
"N"	Low	sump	Exhaust face - Stage N1

Step M1 - Turbocharger lubrication pipe on turbocharger

Lisa M1.PNG (100.08 KiB) Viewed 92 times

Sealing: - Banjo type - 2 washers - 1 bolts Probability: Low Possible causes - Incorrect tightening of the fixing bolt - Fault with the washer sealing - Absence of sealing washer - Fault with the sealing of the union Access: Easy Repair: Replace the union bolt and the seals

Step M2 - Cylinder head cover on cylinder head

Lisa M2.PNG (108.75 KiB) Viewed 92 times

Sealing: - Detachable seal - 12 bolts Probability: Low Possible causes - Incorrect tightening of the fixing bolts - Defective seal - No seal Access: Easy Repair: Replace the seal

Step M3 - dipstick

Lisa M3.PNG (80.94 KiB) Viewed 92 times

Sealing: Detachable O-ring seal Probability: Low Possible causes - Defective seal - Absence of seal Access: Easy Repair: Replace the dipstick

Step M4 - Oil gauge guide on cylinder head

Lisa M4.PNG (99.72 KiB) Viewed 92 times

Sealing: Detachable seal Probability: Low Possible causes - Defective seal - Absence of seal Access: Average Repair: Replace the oil gauge guide

Step M5 - Exhaust camshaft dephaser solenoid valve

Lisa M5.PNG (87.81 KiB) Viewed 92 times

Sealing: - Detachable O-ring seal - 1 bolts Probability: Low Possible causes - Incorrect tightening of the fixing bolt - Defective seal - Absence of seal Access: Average Repair: Replace the electrovalve

Step M6 - Oil non-return pipe on cylinder head

Lisa M6.PNG (100.01 KiB) Viewed 92 times

Sealing: Detachable O-ring seal Probability: Low Possible causes - Incorrect tightening of the valve - Defective seal - Absence of seal Access: Average Repair: Replace the cylinder head

Step M7 - Oil gallery balls on cylinder head

Lisa M7.PNG (98.41 KiB) Viewed 92 times

Sealing: Balls force-fitted Probability: Low Possible causes: Ball shape fault Access: Average Repair: Replace the cylinder head

Step M8 - Cylinder head on cylinder block

Lisa M8.PNG (111.04 KiB) Viewed 92 times

Sealing: - Detachable seal - 13 bolts Probability: Average Possible causes - Incorrect tightening of the fixing bolts - Faulty cylinder head gasket Access: Difficult Repair: Replace the cylinder head gasket

Step N1 - sump

Lisa N1.PNG (100.27 KiB) Viewed 92 times

Sealing: - Seal applied of silicon type - 16 bolts Probability: Low Possible causes - Incorrect tightening of the fixing bolts - Discontinuity of the bead of silicon Access: Easy Repair: Repair of the sealing of the area using an approved product

Step N2 - Crankshaft main bearing casing on cylinder block

Lisa N2.PNG (126.18 KiB) Viewed 92 times

Sealing: - Seal applied of silicon type - 18 bolts Probability: Low Possible causes - Incorrect tightening of the fixing bolts - Discontinuity of the bead of silicon Access: Difficult Repair - Check the tightening torques - Redo the sealing of the crankshaft main bearing casing on the cylinder block, using an approved product

Step N3 - Oil filter cover

Lisa N3.PNG (88.88 KiB) Viewed 92 times

Sealing: Detachable seal Probability: Low Possible causes - Incorrect tightening of the cover - Defective seal - Absence of seal Access: Average Repair: Replace the oil filter cover

Step N4 - Oil pressure sensor

Lisa N4.PNG (93.05 KiB) Viewed 92 times

Sealing: Detachable seal Probability: Low Possible causes - Incorrect tightening - Defective seal - Absence of seal Access: Average Repair: Replace the seal

Step N5 - Oil channel cap

Lisa N5.PNG (92.14 KiB) Viewed 92 times

Sealing: Cap mounted and tightened on the support Probability: Low Possible causes - Incorrect tightening - Fault in the shape of the working surfaces Access: Average Repair: Replace the oil filter support

Step N6 - Exchanger cover on oil filter support

Lisa N6.PNG (98.14 KiB) Viewed 92 times

Sealing: - 4 separate seals - 5 bolts Probability: Low Possible causes - Incorrect tightening of the fixing bolts - Seals defective - Absence of seals Access: Difficult Repair: Replace the oil filter support

N7 - Oil filter support on cylinder block

Lisa N7.PNG (114.88 KiB) Viewed 92 times

Sealing: - 2 separate seals - 4 bolts Probability: Low Possible causes - Incorrect tightening of the fixing bolts - Defective seal - Absence of seal Access: Difficult Repair: Replace the seal (Set of seals)

Step N8 - Turbocharger lubrication return pipe on oil filter support

Lisa N8.PNG (100.58 KiB) Viewed 92 times

Sealing: - Pipe force-fitted - Clamping collars Probability: Low Possible causes - Incorrect tightening of the clip - Crimping fault - Incorrect fitting of the pipe Access: Difficult Repair: Replace the turbocharger lubrication return pip

Step N9 - Turbocharger lubrication return pipe on turbocharger

Lisa N9.PNG (104.42 KiB) Viewed 92 times

Sealing: - Detachable flat seal - 1 bolts Probability: Low Possible causes - Incorrect tightening of the fixing bolt - Defective seal - No seal Access: Difficult Repair: Replace the turbocharger lubrication return pipe O-ring seal

Step N10 - Turbocharger lubrication pipe on cylinder block

Lisa N10.PNG (108.82 KiB) Viewed 92 times

Sealing: - Banjo type union - 2 flat washers - 1 bolts Probability: Low Possible causes - Incorrect tightening of the fixing bolt - Bolt head fault - Washer absent or incorrectly positioned - Fault with the banjo union Access: Difficult Repair: Replace the union bolt and the seals