Replacing the timing chain on a 111 series engine
Illustrative material on replacing the timing chain for the 111 series engine is presented in the illustration, to which all references in the text refer.
Removal
1. Remove the cylinder head cover (20).
2. Remove the spark plugs.
3. Turning the crankshaft in the normal direction, bring the piston of the first cylinder to the position 20° after TDC.
4. Using the locking rods (01), secure the intake (75) and exhaust (78) camshafts.
5. Remove the chain tensioner (14).
6. Using the special tool (02), secure the chain (4).
7. Using a special tool, separate the chain links and remove the chain from the engine.
Installation
1. Place the new chain in its regular place and use a special device to connect the links.
2. Having completed the necessary preparations (see Section Removal and installation of timing drive components), install the chain tensioner (14).
3. Check that the camshafts are in the correct basic position (see Section Setting the base position of the camshafts).
4. Install the cylinder head cover.
5. Start the engine and check for signs of developing leaks.
Replacing the timing chain on engines of the 112 and 113 series
1 - Timing chain holder (right); 2 - Timing chain holder (left); 3 - Camshaft locking rod (right); 4 - TORX head screws
Illustrative material on replacing the timing chain for engines of the 112 and 113 series is presented in the illustration, to which all references in the text refer.
Removal
1. Disconnect the negative cable from the battery.
2. Remove the spark plugs
3. Remove the cylinder head covers.
4. Remove the electric cooling fan/viscous fan assembly (depending on the configuration) and the fan shroud.
5. Turning the crankshaft in the normal direction, bring the piston of the first cylinder to the position 40° after TDC - the camshafts should turn with their grooves towards the center plane of the engine and be freely fixed by the locking rods.
Note: On models equipped with an air pump, the combination valve must be unbolted before installing the right-hand locking pin. The copper-plated segments of the chain must align with the marks on the camshaft sprockets - it may be necessary to rotate the crankshaft up to 14 times to achieve the desired result.
6. Remove the chain tensioner (see Section Removal and installation of timing drive components).
7. Remove the camshaft position (CMP) sensor.
8. Turn the crankshaft in the normal direction to provide easy access to the chain links to be separated.
9. Remove the right camshaft bearing cap bridge.
10. Using the pin (3), lock the right camshaft.
11. Install the chain holders (1 and 2).
12. Using a special tool, separate the chain links and remove the chain from the engine.
Installation
1. Turning the crankshaft in the normal direction, insert the new chain into its regular place.
2. Remove the chain holders (1 and 2) from the cylinder heads.
3. Using a special device, connect the chain links.
4. Turn the crankshaft in the normal direction and achieve the required alignment of the timing marks.
5. Remove the right camshaft locking sleeve (3).
6. Install the right camshaft bearing cap bridge.
7. Install the CMP sensor.
8. Install the chain tensioner.
9. Install the fan shroud.
10. Install the fan assembly.
11. Install the cylinder head covers.
12. Screw in the spark plugs.
13. Connect the negative cable to the battery.