Note: The valve timing of this engine differs from the conventional DOHC design (two overhead camshafts) with four valves per cylinder, since both the right and left camshafts have both intake and exhaust cams. Refer to the illustration below to determine the location of the intake and exhaust valves.
1. Remove the following parts:
- Oil separator.
- Fuel injectors.
- Front engine oil deflector.
- Front cover and timing chain with associated parts.
- Fuel pump.
- Vacuum pump.
2. Remove the camshaft position sensor.
Attention.
- Handle the camshaft position sensor with care and avoid impacts.
- Do not disassemble the camshaft position sensor.
- Avoid exposing the sensor to electromagnetic fields.
3. Remove the upper part of the cylinder head:
Loosen the mounting bolts in the reverse order to that shown in the figure.
The arrow points towards the front of the engine
Note: The illustration shows the tightening sequence of the mounting bolts.
Remove the upper part of the cylinder head (1) using a flat-head screwdriver (A) and a protective pad (B).
Caution: Be careful not to damage the mounting surfaces.
4. Remove the camshafts:
Install the upper part of the cylinder head (1) on the cylinder head stand (A) (KV113B0200 (Mot.1573 according to Renault catalogue)).
Loosen the mounting bolts and remove the main bearing caps and camshafts.
Note: Mark the position of the camshafts and main bearing caps to ensure they are installed in the same place during assembly.
5. If necessary, remove the fuel pump drive gear from the right camshaft.
Installation
1. Install the fuel pump drive gear (if the eye was removed). Tightening torque of the mounting bolt: 40.0 Nm + tightening by 34° clockwise.
2. Install the camshaft into the top of the cylinder head:
Clean the camshaft journals to remove foreign material.
Install the camshafts.
Using the drawing below as a guide, install the camshaft journal covers in their places.
A. Part marked ADM1.
B. Part marked ADM2.
C. Part marked ESN1.
D. Part marked ECH2. Arrow points towards the front of the engine
Tighten the camshaft main bearing cap mounting bolts by hand.
3. Install the upper part of the cylinder head:
Align the crankshaft groove (A) with the hole in the cylinder block (B).
Note: This action is necessary to prevent the valves from contacting the piston crowns.
Completely remove foreign material from the rear side of the cylinder head top and the cylinder head mounting surfaces.
Apply a bead of sealant (a) with a diameter of 0.5-2.5 mm to the cylinder head as shown in the figure.
The arrow indicates the front side of the engine.
Note: Use original sealant or equivalent.
Install the camshafts so that they are in the position shown in the figure: the groove of the right camshaft (1) must be installed so that the protruding part is on top, and the installation mark of the left camshaft (2) must coincide with the protrusion on the cylinder head.
Tighten the upper cylinder head mounting bolts in several stages:
The arrow indicates the front side of the engine
Sequentially tighten the cylinder head upper part mounting bolts No.2, 7, 14 and 20 to ensure uniform seating of the upper part on the cylinder head.
- To bait (but don't delay) remaining bolts.
- Unscrew bolts No.2, 7, 14 and 20.
- To bait (but don't delay) bolts No.2, 7,14 and 20.
- Tighten all bolts in the specified sequence to a torque of 5.0 Nm.
- Tighten all bolts in the specified sequence to a torque of 12.0 Nm.
Note: After tightening the mounting bolts, remove all excess sealant from the cylinder head joints.
4. Install the timing chain and associated parts.
5. Install all remaining parts in the reverse order of removal.