Timing belt (F4P) — method 1 (Renault Laguna 2)

Note: There are two ways to set the valve timing.

The first procedure is used to replace all components, if it is necessary to remove the fastening parts of the toothed pulley of the exhaust camshaft and the phase regulator of the intake camshaft.

During this operation, be sure to replace:

• exhaust camshaft toothed pulley fastening nut;
• intake camshaft phase adjuster mounting bolt;
• camshaft phase regulator sealing cuff;
• sealing cuff of the phase regulator plug.

Method for removing the fastening parts of the toothed pulley of the exhaust camshaft and the phase regulator of the intake camshaft.

The operation is performed using the Mot. 1509 and Mot. 1509-01 devices.


Remove the top gear from the bracket.





Install spacer sleeve 1 of tool Mot. 1509-01 on stud 2.



Mot 1509 tool as shown in the picture below.


Fit the upper bolt 3, placing the spacer sleeve 4 using tool Mot. 1509-01 between the tool and the camshaft bearing cap (do not tighten the bolt completely).





Install flange nut 5 of tool Mot. 1509-01.

Tighten flange nut 6 and bolt 7, then engage the gears of tool Mot. 1509 with the camshaft toothed pulleys, tightening nuts 8 to a torque of 80 Nm.


Information is located on the website: RenaultBook

Remove:

• the intake camshaft phase adjuster plug using a 14 mm Allen wrench;
• exhaust camshaft toothed pulley fastening nut, intake camshaft phase regulator mounting bolt.

Replacing the intake camshaft phase regulator sealing cuff

Press in the inlet camshaft phase adjuster seal using tool Mot. 1517 using the same bolt 2.

Note: To use the Mot. 1517 tool, the hole must be reamed to a diameter of 13 mm.

Setting the valve timing

Caution! Be sure to degrease the end of the crankshaft (from the timing drive side). the bore and bearing surfaces of the crankshaft toothed pulley. the bearing surfaces of the accessory drive pulley. as well as the ends of the exhaust camshaft and the intake camshaft phase adjuster. to prevent the toothed belt from slipping between the crankshaft toothed pulley, the exhaust camshaft pulley and the intake camshaft phase adjuster, which may cause engine failure.

Note: To facilitate the installation of the grooves in a horizontal position, install the toothed pulley and phase regulator. Then tighten the old pulley nut and the old phase regulator bolt to a torque of no more than 1.5 N·m. Make sure that the pistons are at half stroke (to prevent the valves from touching the pistons).

Position the camshaft grooves horizontally as shown in the figure (if necessary, turn the camshafts using tool Mot. 799-01).





Make sure the intake camshaft phase adjuster ring gear is securely locked in place (the crown does not rotate either left or right).



Fit tool Mot. 1496 to the ends of the camshafts.



Remove the old toothed pulley mounting nut, the old phase regulator mounting bolt and replace them with new ones (the gap between the nut or bolt and the camshaft pulleys should be.



Make sure the crankshaft is locked at top dead center and the pin is in the balance hole (groove 5 of the crankshaft must be directed upwards).


When installing the timing belt, be sure to replace the timing belt tensioner and idler rollers.



Then make sure that protrusion 1 of the tension roller fits correctly into groove 2.





Install:

• timing belt;
• idler pulley 3, tightening the mounting bolt to a torque of 45 Nm;
• crankshaft pulley with bolt pre-tightened (but tighten the bolt completely, the gap between the bolt and the pulley should be 2-3 mm).

Note: The crankshaft pulley splinter bolt is reusable for a year. If the length to the head is not more than 49.1 mm (otherwise replace the bolt).

But lubricate the new bolt with engine oil. On the contrary, the threads and the underside of the head of the reused bolt must be lubricated with engine oil.

Belt tension

Make sure that the gap between the nut, bolt and the camshaft toothed pulleys has not changed and is 0.5-1 mm.

Note: Do not rotate the tension roller counterclockwise.

Align marks 6 and 7 on the tension roller using a 6mm Allen key inserted into hole B.

Pre-tighten the tension roller axle mounting nut to 7 Nm.

Turn the valve timing mechanism six turns (from the valve timing side) for the toothed pulley of the exhaust camshaft using the Mot 799-01 tool.

Note: Ensure that the camshaft timing pulley nut and bolt do not come into contact with the timing pulleys by pressing the timing pulleys against the camshafts from time to time.

Align marks 6 and 7 if necessary by loosening the tension roller axle nut but not more than one turn, holding the roller with a 6 mm Allen key. Then finally tighten the nut to 2.8 Nm, Tighten the crankshaft pulley mounting bolt to 2 Nm (in this case the crankshaft must be locked with the top dead center lock).



Apply pencil marks to the C Motov camshaft timing pulleys and camshaft bearing cap.

Remove the top dead center lock.



Lock the flywheel with a powerful screwdriver, then tighten the crankshaft pulley mounting bolt by 115±15°.


Lock the crankshaft, having previously aligned the marks made between the camshaft sprockets and the camshaft bearing cap. These marks must be aligned, as this allows you to make sure that the locking pin is in the hole intended for it, and not in the balance hole of the crankshaft.



Fit the camshaft timing pulley locking tool Mot. 1509, fitted with the additional tool element Mot. 1509-01.

Follow the same procedure as for removal.

Checking the valve timing

Before checking the valve timing, make sure that the tension roller marks are aligned.

Install the top dead center lock (make sure that the previously applied marks on the camshaft timing pulleys are aligned).

Install (without making any effort) mot. 1496 device for fixing camshafts (the camshaft grooves must be in a horizontal position and offset downwards from the axis). If the tool cannot be installed, re-set the valve timing and adjust the timing belt tension.



Install plug 1 (with a new sealing cuff) phase regulator and tighten it to a torque of 2.5 Nm.