1. Remove the ground cable from the battery. To improve access to the crankshaft pulley, apply the handbrake, raise the front of the car and secure it on stands.
2. To check camshaft cam location, remove the cylinder head cover or remove the brake vacuum pump with the timing gear mounting hole visible on the camshaft.
3. Turn the engine with a wrench on the crankshaft pulley until the timing mark on the crankshaft pulley aligns with the pointer. In this case, the pistons of the first and fourth cylinders are at the top dead centers.
4. To determine which piston is in the compression stroke, check the position of the camshaft lobes. If the piston of cylinder 1 is in the compression stroke, the camshaft lobes of cylinder 1 will be pointing up and the valve timing hole on the left side of the camshaft will be in the upper position. If the camshaft lobes of cylinder 1 are pointing down, rotate the engine crankshaft 360°.
5. When the piston of the first cylinder is set to TDC in the compression stroke, the camshaft cams (indicated by arrows) the first cylinder will be directed upwards.
6. When the piston of the first cylinder is set to TDC in the compression stroke, the valve timing mechanism installation hole (indicated by the arrow) will be on top.
7. To lock the crankshaft in the position where the piston of the first cylinder is at top dead center in the compression stroke, install the pin through the hole of the crankshaft sensor on the front of the cylinder block.
8. Remove the crankshaft position sensor from the engine block.
9. Secure the crankshaft with a pin (indicated by the arrow) (oil pan removed).
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