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EP6 PSA - N13 BMW - N18 Mini (Prince) engine cylinder head refitting

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  • OVERALL DIFFICULTY INDEX: 8/10
  • IF YOU HAVE NO TOOLS YOU SPEND $ 300 TO GET THEM FOR THIS JOB
  • IF YOU HAVE NO EXPERIENCE YOU SPEND 3 DAYS TO CARRY OUT THIS JOB*
  • RISK OF SKIN IRRITATION FROM CONTACT WITH USED MOTOR OIL OR EYE INJURY DUE TO SOLVENT USE.​​
BEFORE YOU START
  • This pictorial is PART 4 of a set of 5 pictorials:
    1. Cylinder head removal
    2. Timing chain removal
    3. Head gasket replacement
    4. Cylinder head refitting
    5. Timing chain refitting and setting
  • The suggested required time covers the 5 pictorials.
The below works concerned a Peugeot 5008 equipped with a turbo-charged EP6 engine (156 HP version).
Same or similar engine can be found on Peugeot 207, 208, 308, 508, 3008, 5008 and Citroen C4, C4 Sedan, DS3, DS4, DS5 also the Mini Cooper S.
DISCLAIMER:
Our pictorials are of informative nature and do illustrate works carried out by ourselves at our own premises for our own use and satisfaction.
Readers who envisage to carry out similar works inspired by the below method shall do this at their own risks and liability.

​Making sure of the correct EP6 timing tool kit

Prior to refitting your cylinder head and since it is easier to try your tool while the cylinder head is on your bench, make sure that:
​
  • The tool you purchased is compatible with your engine identification plate. In this case, an 5F02 version of the EP6 engine.
  • There are tools available in all specialized shops or on any online re-seller with prices varying in a wide range from less than $100 to several hundreds of dollars.
  • As a DIYer, you may buy one of the lowest priced tools. They are sufficient for a few interventions during a car's lifetime.
Use a 27 combination spanner to rotate the camshafts in a manner that the round face of the ring shown in the left picture just ahead of the spanner points down and the flat face points up.

Fix your tool with the supplied bolts in a way to train on its installation later on with the cylinder head refitted to the engine.

Renewing all seals and gaskets of the cylinder head cover

Replace all seals prior to refitting the EP6 cylinder head since the access to the below parts is much easier with a dismantled cylinder head:
  • Replace the seals of the intake manifold (left)
  • Replace the seal of the thermostat housing (middle)
  • Clean all connectors but in particular the ones of the injectors with an electronic cleaning spray (right)

Unpacking and refitting a new cylinder head gasket

Make sure the head gasket you purchased is not bent or distorted.
Just place the new head gasket over the cylinder block then the cylinder head over the head gasket.
  • Respect the tightening sequence, torque and then angles - MANDATORY. See below.
  • Tighten bolts 4 to 11, then 1 to 3.
  • The manufacturer's instructions including a pre-tightening torque, then one more tightening stage with a given angle are to be followed.
  • Pre-tighten all bolts to the recommended sequence, then tighten them all again to the required angle, etc.
  • DO NOT pre-tighten then continue tightening the same bolt. The sequence applies to each stage of the tightening process.
  • DO NOT interrupt this operation for doing something else or for whatever reason as you could forget which bolt was tightened to which stage.

Tightening torques of the cylinder head of EP6 engine

  1. Tighten all bolts of the cylinder head as per sequence to 3mKg
  2. Tighten all bolts of the cylinder head as per sequence by 90 degrees
  3. Tighten again all bolts of the cylinder head by 90 degrees and always as per sequence
Buy your Peugeot / Mini EP6 engine cylinder head parts here, please make sure of compatibility with your vehicle: