* Crankshaft pulley
* Camshaft gear
* Timing chain cover
The crankshaft pulley timing mark is a small notch or line that is located on the outer edge of the pulley. When the piston in the number one cylinder is at top dead center (TDC), the timing mark on the crankshaft pulley will be aligned with the timing pointer on the timing chain cover.
The camshaft gear timing mark is a small dot that is located on the face of the gear. When the camshaft is installed correctly, the timing mark on the camshaft gear will be aligned with the timing mark on the timing chain cover.
To set the timing on a 1987 Ford Bronco, follow these steps:
1. Remove the distributor cap.
2. Turn the crankshaft until the timing mark on the crankshaft pulley is aligned with the timing pointer on the timing chain cover.
3. Install the distributor cap and turn the distributor until the engine starts to run smoothly.
4. Check the timing with a timing light. The timing should be set at 10 degrees before top dead center (BTDC).
If the timing is not correct, it will affect the performance of the engine and may cause damage to the engine.
