Renault Clio: D4F, and 740 or 742 or 764

REMOVAL

I - REMOVAL PREPARATION OPERATION

• Position the vehicle on a two-post lift (see Vehicle: Towing and lifting) (02A, Lifting equipment).
• Disconnect the battery (see Battery: Removal - Refitting) (80A, Battery).
• Remove the engine undertray.
• Drain the cooling system (see 19A, Cooling, Cooling system: Draining - Refilling, 19A-16).
• Remove:
  • the front right-hand wheel (see Wheel: Removal - Refitting) (35A, Wheels and tyres),
  • the front right-hand wheel arch liner (see Front wheel arch liner: Removal - Refitting) (55A, Exterior protection),
  • the accessories belt (see 11A, Top and front of engine, Accessories belt: Removal - Refitting, 11A-5),
  • the crankshaft accessories pulley (see 11A, Top and front of engine, Crankshaft accessories pulley: Removal - Refitting, 11A-31),
  • the timing belt (see 11A, Top and front of engine, Timing belt: Removal - Refitting, 11A-48),
  • the air filter unit (see 12A, Fuel mixture, Air filter unit: Removal - Refitting, 12A-17),
  • the intake distributor (see 12A, Fuel mixture, Inlet distributor: Removal - Refitting, 12A-45).
  • the ignition coil (see 17A, Ignition, Coils: Removal - Refitting, 17A-2).
• Unclip the electrical wiring from the rocker cover.

• Remove the rocker cover (see 11A, Top and front of engine, Rocker cover: Removal - Refitting, 11A-183).

• Disconnect the upstream oxygen sensor connector (1).
• Remove the mounting (2) from the upstream oxygen sensor connector.

• Disconnect the coolant temperature sensor connector (3).
• Remove the cooling hoses (4) on the water chamber.

• Remove:
  • the bolts (5) from the exhaust flange,
  • the strut bolt (6).

II - OPERATION FOR REMOVAL OF PART CONCERNED

• Remove:
  • the cylinder head bolts,
  • the cylinder head,
  • the cylinder head gasket.

REFITTING

I - REFITTING PREPARATION OPERATION

• parts always to be replaced: Cylinder head gasket.
• parts always to be replaced: cylinder head bolts.

1 - Cleaning the cylinder head

• Clean the cylinder head.

WARNING

Do not scrape the joint faces of the aluminium, any damage caused to the joint face will result in a risk of leaks.

IMPORTANT

Wear goggles with side protectors for this operation.

IMPORTANT

Wear leaktight gloves (Nitrile type) for this operation.

• Clean the joint faces with SUPER CLEANER FOR JOINT FACES (see Vehicle: Parts and consumables for the repair) (04B, Consumables - Products) to dissolve any part of the seal still adhering.
• Apply the product to the part to be cleaned. Wait approximately ten minutes, then remove the residue using a wooden spatula.

WARNING

Do not allow this product to drip onto the paintwork.

Failure to follow this advice could lead to the blocking of the various oil inlet galleries, which would quickly result in engine damage.

2 - Checking the gasket face

• With a ruler and shim set, check for cylinder head gasket face bow.

  The maximum deformation is 0.05 mm.

WARNING

No regrinding of the cylinder head is permitted.

• Test the cylinder head for any cracks using the cylinder head testing tools (see garage equipment catalogue).
• Strip the cylinder head (see ) (Technical Note 6004A, 10A, Engine and peripherals).
• Adjust the valve clearances (see 10A, Engine and cylinder block assembly, Valves: Adjustment, 10A-231).

WARNING

In order to ensure that the bolts are correctly tightened, use a syringe to remove any oil which may be in the cylinder head mounting holes.

II - REFITTING OPERATION FOR PART CONCERNED

• Bring the pistons to mid-stroke position to prevent them from coming into contact with the valves during the tightening of the cylinder head.
• Fit the cylinder head with a new gasket.
• Refit new cylinder head bolts.

• Tightening the cylinder head:
  • pretighten to torque and in order the cylinder head bolts (initial torque) (20 N.m),
  • check that all of the cylinder head bolts are tightened to the correct torque,
  • angle tighten in order the cylinder head bolts (230

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