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August 29, 2023

Proven mechanical & electrical repair fixes from Autodata – Citroen C4

How to diagnose a mechanical fix for a vehicle. Our experts provide help for the trickier automotive fixes – Citroen C4 oil leak.

Tell us the make & model of the car plus the year of manufacture.

Citroen C4 Grand Picasso II (2015)

Provide an overview of the problem

Engine oil leak from bell housing area

Please provide details of the issue you have and what you have tried so far.

A customer of ours has a 2015 Citroen C4 Grand Picasso 1,2 petrol. The vehicle had an engine oil leak in the area of the transmission bell housing. We replaced the crankshaft rear oil seal with an aftermarket item. Now the vehicle has come back to the workshop with the same engine oil leak after only a few months. We suspect the crankshaft rear oil seal, are you aware of any other possible causes before we remove the transmission again?

What does Autodata recommend?

Yes, we have come across this engine oil leak issue before. It affects all C4 Grand Picasso models with HNY engine code and manual transmission produced up to 24/09/15 (RPO 14199). The fault is due to an unsatisfactory design of the crankshaft rear oil seal carrier allowing engine oil to seep out into the transmission bell housing area. To rectify this fault, fit a modified crankshaft rear oil seal carrier complete with new crankshaft rear oil seal, available from Citroen parts department. Inspect clutch assembly for oil contamination, replace if necessary. Carry out road test to confirm the fault has been rectified.

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