Pic. 2.158. Timing Belt Components
Withdrawal
Loosen the coolant pump pulley bolts.
Loosen the alternator mounting bolt.
Pic. 2.159. Coolant pump pulley and alternator drive belt
Remove the coolant pump pulley and alternator drive belt (pic. 2.159).
Remove the crankshaft pulley.
Pic. 2.160. Timing belt cover
Remove the timing belt cover (pic. 2.160).
Remove the timing belt tensioner pulley.
Remove the timing belt.
Pic. 2.161. Timing Belt Tensioner Pulley
Pic. 2.162. Marks indicating the direction of rotation
Note. If the timing belt is reused, it must be chalked on the back (non-working) belt surface an arrow indicating the direction of rotation (or crankshaft pulley location), so that when installing the belt, do not confuse the direction of its rotation (pic. 2.162).
Loosen the crankshaft sprocket bolts. Remove the sprocket and guide washer from the crankshaft.
Remove the timing belt tensioner.
Checking the sprocket, timing belt tensioner pulley and idler pulley
Check the camshaft sprocket, crankshaft sprocket, timing belt tensioner pulley and idler pulley for excessive wear, cracks or damage.
Replace them if necessary.
Pic. 2.163. Checking the smooth rotation of the timing belt tensioner pulley
Check the ease and smoothness of rotation of the timing belt tensioner pulley and idler pulley and make sure that there is no excessive play and extraneous noise during rotation (pic. 2.163).
Replace roller if necessary.
Replace the roller if traces of lubricant leakage from its bearing are found.
Check the belt for dirt or oil deposits. Replace belt if necessary. Light dirt on the belt can be removed with a dry cloth or tissue paper. Do not use solvents for these purposes.
Pic. 2.164. Timing belt defects
When overhauling the engine or adjusting the belt tension, carefully inspect the belt. If any of the defects listed below are found, replace the belt with a new one (pic. 2.164).
Note. A normal belt should have sharply pointed sides, similar to knife-cut surfaces.
Installation
Pic. 2.165. Installing the guide washer and crankshaft sprocket
Install the guide washer and crankshaft sprocket as shown (pic. 2.165).
Pay attention to the orientation of the parts when installing.
Tightening torque of the crankshaft sprocket bolt: 170–180 Nm.
Pic. 2.166. Installing the camshaft sprocket
Install the camshaft sprocket, tighten its fastening bolt to the nominal torque (pic. 2.166).
The moment of an inhaling of a bolt of fastening of an asterisk of a camshaft: 100–120 Н·м.
Install the guide roller and tighten its fastening bolt to the nominal torque.
The moment of an inhaling of a bolt of fastening of a directing roller: 43–55 Н·м.
Align the crankshaft and camshaft sprocket marks with the alignment marks when the #1 cylinder piston is at TDC on the compression stroke.
Pic. 2.167. Timing belt and crankshaft sprocket installation diagram
Put the timing belt on the crankshaft sprocket (pic. 2.167).
Pic. 2.168. Tensioning the working branch of the belt
Slide the timing belt onto the camshaft sprocket. After that, make sure that the working branch of the belt is taut. Then apply force in the reverse direction of rotation (counterclock-wise) to the camshaft sprocket to tighten the working branch of the belt, and make sure that all the alignment marks are aligned (pic. 2.168).
Tighten the tensioner adjusting bolt first, then the tensioner pivot bolt.
Tightening torque of the tensioner mounting bolt: 43–55 Nm.
Rotate the crankshaft one revolution in the normal direction of rotation (clockwise) and again align the crankshaft mark with the alignment mark (cylinder #1 at TDC on the compression stroke).
Pic. 2.169. Checking the timing belt tension
Recheck timing belt tension. With light pressure (with a force of approximately 20 N) in a horizontal direction on the belt in the middle of its working path, make sure that the top of the belt tooth deviates by about 4-6 mm (pic. 2.169).
Check that the top of the timing belt tooth is deflected by about 1/4 of the width of the tensioner adjusting bolt head (relative to the face of the bolt head).
Install the timing belt cover.
Tightening torque of the timing belt cover bolts: 8–10 Nm.
Install the crankshaft pulley. Make sure the crankshaft sprocket drive pin fits into the small hole in the crankshaft pulley.
The moment of an inhaling of bolts of fastening of a pulley of a cranked shaft: 140–150 Nm.
Install the water pump pulley.
Pic. 2.170. Alternator drive belt
Install the alternator drive belt and adjust its tension (pic. 2.170).