1. Remove the ground wire from the battery. To improve access to the crankshaft pulley, apply the handbrake, raise the front of the vehicle and secure it on stands.
2. To check the position of the camshaft cams, remove the cylinder head cover or remove the vacuum pump of the brakes, while the hole for installing the timing mechanism will be visible on the camshaft.
3. Turn the engine with a wrench by the crankshaft pulley until the alignment mark on the crankshaft pulley aligns with the pointer. In this case, the pistons of the first and fourth cylinders become top dead centers.
4. To determine which piston is on the compression stroke, check the position of the camshaft lobes. If the No. 1 piston is on the compression stroke, the No. 1 camshaft lobes will point upwards and the timing gear mounting hole on the left side of the camshaft will be in the up position. If the lobes of the first camshaft cylinder are pointing down, turn the engine crankshaft 360°.
5. When installing the piston of the first cylinder at TDC in the compression stroke, the camshaft lobes (indicated by arrows) the first cylinder will be directed upwards.
6. When installing the piston of the first cylinder at TDC in the compression stroke, the installation hole of the gas distribution mechanism (indicated by an arrow) will be at the top.
7. To lock the crankshaft in position when the number one piston is at top dead center on the compression stroke, install a pin through the crankshaft sensor hole on the front of the cylinder block.
8. Remove the crankshaft position sensor from the engine block.
9. Fix the crankshaft with a pin (indicated by an arrow) (oil pan removed).
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