However, if you're determined to do it yourself, here's a general outline. This is not a comprehensive guide and you should consult a repair manual specific to your 1990 Ford Mustang 2.3L for detailed instructions, torque specifications, and diagrams. A Haynes or Chilton manual is a good investment.
Tools You'll Need (at a minimum):
* Timing belt kit: This usually includes the belt, tensioner, and sometimes other related parts. Buy a quality kit from a reputable auto parts store.
* Jack and jack stands: Essential for safely working under the car.
* Wheel chocks: To prevent the car from rolling.
* Socket set and wrenches: Various sizes will be needed.
* Torque wrench: Crucial for tightening bolts to the correct specifications.
* Pliers: For various tasks.
* Screwdrivers: Phillips and flathead.
* Timing belt alignment tools: These can be specific to your engine; your repair manual will show you what you need. These are often crucial for proper alignment.
* Crank pulley holder: This tool prevents the crankshaft from turning while you work on the timing belt.
* Repair Manual: Absolutely essential.
General Steps (Consult your repair manual for precise details):
1. Safety First: Disconnect the negative battery cable. Place the car securely on jack stands. Use wheel chocks.
2. Remove Components: You'll need to remove various components to access the timing belt, including the serpentine belt, various covers, and possibly other components depending on your particular engine. Your repair manual will provide the correct disassembly order.
3. Locate Timing Marks: The most critical step. Your repair manual will show you the location of the timing marks on the crankshaft pulley, camshaft sprockets, and the timing belt cover itself. These marks *must* align perfectly.
4. Remove the Old Timing Belt: Carefully remove the old timing belt, noting its routing.
5. Install the New Timing Belt: Carefully install the new timing belt, ensuring all the timing marks are perfectly aligned. Use the alignment tools if needed. The tensioner will need to be properly installed and adjusted to the correct specification; this often involves specific tools or procedures.
6. Install Components: Reinstall all the components you removed in reverse order.
7. Check Timing: After reassembly, verify that all the timing marks are still correctly aligned.
8. Reconnect Battery: Reconnect the negative battery cable.
9. Start Engine: Start the engine and listen for any unusual noises. Check for leaks.
Again, this is a simplified overview. Incorrectly installing a timing belt can cause catastrophic engine damage. Refer to your repair manual for precise instructions and torque specifications. If you're uncomfortable with any part of this process, take your car to a qualified mechanic. The cost of repairs due to a timing belt misalignment is far greater than the cost of professional labor.
