Table of contents: Removal 🠇 Installation 🠇
Gas distribution system
1 – crankshaft; 2 – timing drive pulley; 3 – toothed belt; 4 – coolant pump; 5 – tension roller; 6 – eccentric screw; 7 – tension roller spring; 8 – camshaft pulley; 9 – camshaft; 10 – mounting bracket; 11 – pusher; 12 – adjusting plate; 13 – spring; 14 – plate; 15 – crackers; 16 – oil deflector cap; 17 – exhaust valve; 18 – timing drive housing; 19 – inlet valve
The timing belt drives the camshaft and the coolant pump. If the belt breaks, the pistons may collide with the valves and cause serious engine damage. Therefore, it is necessary to replace the belt at the prescribed time or earlier if the belt has been contaminated with oil or has uneven wear.
Important! The timing belt tension on models from 1992 onwards can only be accurately set using a special electronic tool. If the belt tension is approximate, the tension must be checked using a special electronic tool at the first convenient opportunity. Do not drive the vehicle long distances or operate the engine at high speeds until the belt tension is correct.
Removing the camshaft drive belt is necessary to perform the following operations:
- removal and installation of the cylinder head or camshaft;
- removing and installing the coolant pump;
- removing and installing the oil pump drive chain;
- removing and installing the crankshaft seal ring;
- valve clearance adjustment.
Cam and tip of the eccentric roller of the camshaft drive belt tensioner
Timing Belt Layout - 1998cc 16 Valve Models
1 – front tensioning mechanism; 2 – rear pulley of the tension mechanism; 3 – position of holes for fixing camshaft pulleys; 4 – hole for fixing the crankshaft pulley; 5 – belt tension measurement area (use special tool Peugeot)
Blocking of camshaft pulleys in 1998 cm³ engine with 16 valves
The camshaft pulleys are indicated by arrows.
Removal
Models 1580 cc and 1905 cc with 8 valves up to 1992 with semi-automatic belt tensioner
1. Remove the ground wire from the battery.
2. Loosen and remove the alternator drive belt.
3. Remove the upper camshaft drive belt cover.
4. Remove the side cover.
5. Using the pulley bolt, turn the crankshaft so that the timing drive elements are set in a position that allows them to be fixed with rods. To fix these elements, use two special steel rods with a diameter of 10 mm and a length of 70 mm (fixture 00163).
6. Insert one rod through the camshaft pulley and the other through the crankshaft pulley (there is a hole with a diameter of 10 mm on the thickening).
7. Remove the rods.
8. Remove the lower plate covering the clutch housing and secure the flywheel (for example, with the Facom D 86 device).
9. Remove the crankshaft pulley.
10. Remove the Facom D 86 tool.
11. Remove the plastic camshaft drive belt covers, first the lower left one, then the upper and lower right ones.
12. Loosen the tension roller holder nuts and the eccentric control lock nut.
13. Using a 6mm square clamp to control the eccentric, compress the spring together with the tension roller holder.
14. Tighten the lock nut. The belt is loose.
15. Remove the belt, being careful not to bend it. If the toothed belt is to be reused, it is necessary to mark its direction of rotation.
1580cc and 1905cc 8-valve models from 1992 onwards with manual belt tension adjustment, and all 1761cc and 1998cc 8-valve models (differences)
16. To secure the timing drive pulleys, use a rod with a diameter of 10 mm on one side and 8 mm on the other.
17. Loosen the timing belt tensioner pulley bolt and turn the pulley clockwise using a square wrench that fits the hole in the pulley hub. Retighten the pulley bolt securely.
1905cc 16 valve models (differences)
18. Loosen the front timing belt tensioner and the rear tensioner pulley bolts. Turn the front pulley clockwise using a square wrench that matches the hole in the pulley hub and retighten the pulley mounting bolt securely. Similarly, turn the rear pulley counterclockwise and retighten the pulley mounting bolt securely.
19. Check the position of the camshaft pulleys, crankshaft locking rods, remove and inspect the toothed belt.
20. Loosen the rear timing belt tensioner pulley fixing bolt, turn the pulley clockwise and retighten the pulley fixing bolt.
1998cc 16 valve models (differences)
21. Loosen the bolts securing the two front tensioner assemblies.
22. Loosen the tension roller holder nuts and the eccentric control lock nut.
23. Move the tensioner pulley as far away from the belt as possible using a square wrench and remove the timing belt (see illustration Timing Belt Location - 1998 cc 16 Valve Models).
Installing the camshaft drive belt
A, B – fixing gears before removing them,
C, D – signs on the toothed belt and on the pulleys
Timing Belt Installation Sequence (1905 cc engines with 16 valves)
1, 2, 3, 4, 5, 6 – sequence of installation of the toothed drive belt
Installation
Models 1580 cc and 1905 cc with 8 valves up to 1992 with semi-automatic belt tensioner
1. Before installing the belt in its original place, completely clean the toothed belt drive pulleys. Check the smooth rotation of the tensioner pulley.
2. Correctly install the camshaft by inserting a special rod into the appropriate place through the camshaft pulley.
3. Place the belt where it is installed, taking into account the arrows indicating the direction of its movement. Put the belt on the crankshaft pulley.
4. Clean the crankshaft head, pulley and its bolt.
5. Install the pulley onto the end of the crankshaft without tightening the fastening elements.
6. By inserting a rod through the pulley, check the position of the crankshaft.
7. Place the belt first on the camshaft pulley, then on the tensioner pulley, and finally on the coolant pump pulley.
8. Loosen the eccentric control lock nut and use a 6 mm square holder to move the eccentric to the output position (the tension roller will automatically apply tension).
9. Make sure the eccentric cam is in the output position (turned down) and does not pass through the top of the coolant pump disc.
10. Remove both rods.
11. Tighten the tension roller holder nuts and the eccentric lock nut.
12. Using the pulley bolt, turn the engine crankshaft two revolutions so that the piston of cylinder 1 is set to TDC (the mark on the flywheel should be opposite the "0" mark on the ignition adjustment plastic). The valve timing elements will be in the position shown in the figure Installing the camshaft drive belt.
13. Loosen and tighten the nuts (1) and lock nut.
14. Turn the engine crankshaft until the timing drive elements are fixed with the rods. Use two rods to check the timing installation. If the rods are not inserted, repeat all operations.
Attention! It is also possible to set the valve timing using the marks (dashes) on the belt. The position of these marks must correspond to the marks on the pulleys.
15. Connect the ground wire to the battery.
1580cc and 1905cc 8-valve models from 1992 onwards with manual belt tension adjustment, and all 1761cc and 1998cc 8-valve models (differences)
16. Install the timing belt as described above.
17. Loosen the tensioner pulley mounting bolt.
18. Install special measuring equipment on the front branch of the belt to measure belt tension.
19. Adjust so that the initial belt tension is 16±2 units on the 1998 cc 8-valve model and 30±2 units on all other models.
20. Turn the crankshaft several times and re-measure the tension of the front branch of the belt, which should be 44±2 units.
21. If you do not have a belt tension gauge, tighten the belt so that you can turn the front section of the belt 90° with your thumb and forefinger. After adjusting the belt tension, tighten all bolts.
1905cc 16 valve models (differences)
22. Loosen the tensioning mechanism bolts so that they can be easily turned (see figure Sequence of installation of timing belt drive (1905 cc engines with 16 valves)).
Caution! The belt may have timing marks in the form of yellow lines to ensure correct installation on both the camshaft pulleys and the crankshaft pulley. The two timing marks with a single line must join the mark on each camshaft pulley. The timing mark with a double line must join the crankshaft mark (against the groove of the segment key).
23. Move the front and rear tensioner pulleys toward the timing belt until they make full contact, then tighten the bolts.
24. Move the front tensioner pulley counterclockwise until the gap is completely selected and tighten the bolts in this position. Install the rear tensioner pulley in the same way.
25. If you have measuring equipment, tighten the front section of the belt to 19 units.
26. Loosen the rear tensioner pulley mounting bolt and turn the pulley clockwise until the front belt section tension is 21 units.
27. If you do not have a belt tension gauge, tighten the belt so that you can rotate the front part of the belt between the camshaft pulley and the tensioner pulley by 45° with your thumb and forefinger. After adjusting the belt tension, tighten all bolts.
28. Turn the crankshaft several times and re-measure the tension of the front branch of the belt between the camshaft pulley and the tensioner pulley, which should be 45±5 units.
1998cc 16 valve models (differences)
29. Move the tensioner pulley so that the front branch of the belt is tensioned to 45 units, and then set the belt tension to 22±2 units.
30. Loosen the rear tensioner pulley mounting bolt and turn the pulley counterclockwise until the front belt section tension is 32±2 units.
31. If you do not have a belt tension gauge, tighten the belt so that you can rotate the front part of the belt between the camshaft pulley and the tensioner pulley by 45° with your thumb and forefinger. After adjusting the belt tension, tighten all bolts.
32. Turn the crankshaft several times and re-measure the tension of the front branch of the belt between the camshaft pulley and the tensioner pulley, which should be 53±2 units.