Oil Leak From Timing Chain Cover

[scaramac]

Anyone got any experience of this? Just been told by a garage after giving the engine a clean to locate the leak that this is where it is coming from. Recommended replacing the cover as they tend to bend when being taken off and they're difficult to reseal.

How difficult a job or how long would this take? I have an 07 2.2 HDi.

[paul.h]

Welcome to the forum.

 

If you are going to the bother of removing the timing chain cover you should also consider replacing the chain/guides/tensioner/water pump since the job to remove the cover is most of the work needed when replacing the chain. Book time is around 5 to 6 hours to replace the cover and about 1 hour more doing the other bits to replace the chain.

 

The job seems to be similar to replacing a timing belt on a car but since the cover has a sealant gasket (E10 mentioned in the procedure) this is released with a knife blade starting at the top. The following is copied from the Citroen service box procedures for timing chain replacement for the Relay 3 with the 2.2 hdi 100 engine but does not include the pictures since these do not copy from the dvd. If only doing the cover it will not be necessary to fit the timing tools. Note the torque values are given in daN.m multiply these values by 10 to give Nm.

 

1. Recommended tools

 

[1] flywheel locking tool (Double flywheel) (-).0198.A

[2] Timing cover centring pin (-).0198.G

[3] camshaft gear setting rod (-).0198.B2

[4] roller locking pin (-).0198.J

[5] crankshaft seal fitting tool (timing side) (-).0198.D

[6] Crankshaft drive tool (-).0198/2.A

 

2. Removing

ESSENTIAL : Respect the safety and cleanliness recommendations that are specific to high pressure diesel injection (HDi) engines.

CAUTION : After switching off the ignition, wait 15 minutes before disconnecting the battery (to guarantee that the initialisations of the various ECUs are memorised). (Disconnecting the battery may not be necessary)

Place the vehicle on a 2 -post lift.

Remove the front right-hand wheel.

Disconnect the battery negative terminal. (If deciding to disconnect the battery)

Remove :

• The right-hand protector under the engine
• The front right mud shield (see the relevant operation)
• The upper central bumper (see the relevant operation)
• The right-hand headlamp (see the relevant operation)
• The right-hand bumper (see the relevant operation)

3. Removing (continued)

 

Remove one accessories drive pulley (2) fixing bolt (1).

 

Fit the tool [6].

Secure the tool [6a] ; Using the screws [6b].

Fit the driver [6c].

Tighten the bolt [6d] .

Remove :

• The auxiliary equipment drive belt (see the relevant operations)
• The alternator and air conditioning compressor drive belt guide rollers Check the electrical operation of the equipment

ESSENTIAL : Do not slacken the bolts securing the top dead centre sensor support on the engine.

Remove :

• The air filter casing
• The engine speed sensor

Peg the crankshaft, using tool [1].

Remove :

• The tool [[6]]
• The bolts (1)
• The ancillary drive pulley (2)

Support the engine ; Using a workshop crane.

 

Remove :

• The upper engine mounting (3)
• The intermediate engine mounting (4)

 

Release the timing cover crank shaft pulley ring oil seal (6) ; Using the tool [5] and turning through 1/4 of a turn anticlockwise.

CAUTION : Detach the timing cover (5) ; Using a knife blade, starting at the top.

Remove :

• The sealing ring (6)
• The cover 19 bolts (7)
• The cover nuts (8)
• The timing cover (5)

Peg the camshafts ; Using tool [3].

 

Insert a screwdriver at "a".

Move aside the chain tensioner ratchet (9) (Outwards).

Compress the timing chain tensioner (9) ; By means of a screwdriver.

Lock the timing chain tensioner ; Using tool [4].

 

Remove :

• The tool [3]
• The upper chain guide (11)
• The camshaft drive sprockets (14)
• The timing chain (12)
• The timing chain guide (13)
• The timing chain guide (10)
• The chain tensioner (9)

4. Check

ESSENTIAL : Just prior to refitting, carry out the checks below.

Check the condition of the timing chain.

Check the condition of the chain guides.

Check the condition of the chain tensioner.

 

5. Refitting

 

Refit :

• The chain guide (10)
• The chain tensioner (9)
• The bolts (18)

Tighten the bolts (18) to 1,6 ± 0,3 daN.m.

Position the timing chain (12) on the camshaft drive sprockets (14).

Align the links marked in black "b" and "c" with the teeth marked "d" and "e" on the camshaft drive sprockets (14).

Refit the timing chain (12) and camshaft drive sprockets (14) assembly on :

• The double sprocket (17)
• The exhaust camshaft
• The inlet camshaft

Refit :

• The screws (15), (16), without tightening them
• The tool [3]
• The chain guide (11) ; Tightening to 1,6 ± 0,3 daN.m
• The chain guide (13) ; Tightening to 1,6 ± 0,3 daN.m

Remove the tool [4].

 

Unscrew :

• The (15) bolt
• The (16) bolt

Check that the screws (15), (16) are not at the end of slots.

Tighten the bolts (15), (16) to 3,3 ± 0,3 daN.m.

Remove the tool [3].

 

 

CAUTION : Clean the cover gasket faces with an approved descaling product. Do not use abrasives or sharp tools on the joint faces. The seal faces should not show any traces of impacts or scratches.

Apply a bead of index "E10" sealant to the periphery of the timing cover (5).

Refit :

• The timing cover (5)
• The 19 bolts (7)
• The nuts (8)

Centre the timing cover (5) ; Using tool [2].

Tighten :

• The 19 bolts (7) to 1,1 ± 0,2 daN.m
• The nuts (8) to 1 ± 0,1 daN.m

 

 

Refit the ring oil seal (6) (Fitted with its fitting cone).

Engage the ring oil seal (6) in the timing cover (5).

Remove the fitting cone from the ring seal (6).

Lock the ring seal (6) ; Using the tool [5] and turning through 1/4 of a turn clockwise.

Refit :

• The intermediate engine mounting (4)
• The upper engine mounting (3)

Tighten :

• The intermediate engine mounting bolts (12 diameter) to 8 ± 1,1 m.daN
• The intermediate engine mounting bolt (10 diameter ) to 4,8 ± 0,6 m.daN (without air conditioning compressor)
• The intermediate engine mounting pillar screw to 4,8 ± 0,6 m.daN Check the electrical operation of the equipment
• The upper engine mounting bolts to 10 ± 2,3 m.daN
• The upper engine mounting nuts to 11 ± 1,2 m.daN

Coat screws (1) with LOCTITE FRENETANCH E3.

Refit :

• The ancillary drive pulley (2)
• The bolts (1)

Tightening method for the screws (1) :

• Tighten to 4,5 ± 0,4 daN.m
• Angular tighten to 120 ± 5°

Remove the tool [1].

 

 

Refit :

• The engine speed sensor (19)
• The (20) bolt

CAUTION : When refitting an engine speed sensor, the air gap between the sensor and the target must be observed.

ESSENTIAL : Set the engine speed sensor by positioning a 1,2 mm thick shim at " f " before tightening the screw (20).

Tighten the bolt (20) to 0,7 ± 0,1 daN.m.

Refit the air filter housing.

Refit :

• The alternator and air conditioning compressor drive belt guide rollers Check the electrical operation of the equipment
• The auxiliary equipment drive belt (see the relevant operations)
• The right-hand bumper (see the relevant operation)
• The right-hand headlamp (see the relevant operation)
• The upper central bumper (see the relevant operation)
• The front right mud shield (see the relevant operation)
• The right-hand protector under the engine
• The front right wheel

Return the vehicle to its wheels.

 

Tighten the wheel bolts.

Reconnect the battery negative terminal.

Start the engine.

Check the voltage supplied by the engine speed sensor ; Using the diagnostic equipment.

CAUTION : The voltage must be 3,2 ± 0,2 V.