However, if you're determined to do it yourself, here's a general overview. This is NOT a complete guide and should not be substituted for a proper repair manual specific to your vehicle. Always consult a factory service manual for detailed instructions, torque specifications, and diagrams.
Before You Begin:
* Gather your tools: You'll need a variety of tools, including wrenches (metric), sockets, ratchets, a timing belt tool kit (specifically designed for this engine – crucial for alignment!), jack stands, wheel chocks, a torque wrench, and possibly a harmonic balancer puller.
* Obtain the correct parts: Get a new timing belt, tensioner pulley, water pump (often replaced at the same time), and any other worn components you find during inspection. Use OEM or high-quality replacement parts.
* Safety First: Disconnect the negative battery terminal. Work in a well-ventilated area. Wear safety glasses and gloves.
General Steps (Highly Simplified):
1. Preparation: Raise the front of the vehicle securely on jack stands. Remove the front wheels and possibly the right-front wheel well liner for better access.
2. Access the Timing Belt: You'll need to remove various components to gain access to the timing belt. This often includes:
* Various belts and pulleys (alternator, power steering, AC).
* Possibly the crankshaft pulley.
* Parts of the engine cover.
3. Mark the Timing Belt and Components: Before removing the old belt, carefully mark the positions of the crankshaft, camshaft(s), and the timing belt itself. This is CRITICAL for proper reassembly. Incorrect alignment will cause engine damage.
4. Remove the Old Timing Belt: Loosen the timing belt tensioner to remove the old belt.
5. Replace Components: Replace the tensioner pulley, water pump (if necessary), and any other worn components.
6. Install the New Timing Belt: Carefully install the new timing belt, ensuring it's correctly aligned with your markings. Use the timing belt tool kit to properly tension the belt.
7. Reassembly: Reinstall all the removed components in the reverse order of removal. Be meticulous, paying close attention to proper torque specifications for all bolts and nuts.
8. Check and Adjust: Double-check your timing marks. If necessary, make minor adjustments to ensure proper alignment.
9. Test: Reconnect the battery. Start the engine and listen for unusual noises. Let the engine run for a few minutes to ensure everything is working properly.
Again, this is a highly simplified overview. The actual process is far more involved and requires specialized knowledge and tools. Improperly replacing a timing belt can cause catastrophic engine failure.
Strongly recommend seeking professional help from a qualified mechanic. The cost of a professional repair is far less than the cost of a damaged engine. A repair manual specific to your 1996 Mercury Villager 3.0L engine is invaluable. You can usually find these manuals online or at auto parts stores.
