This is not a step-by-step guide, but rather an overview of the general process and crucial considerations. Consult a factory service manual specific to your 1992 Subaru SVX for detailed instructions, torque specifications, and diagrams. A Haynes or Chilton manual might also help, but the factory manual is the definitive source.
Here's a high-level outline of what's involved:
1. Preparation:
* Gather tools: You'll need a complete set of metric sockets, wrenches, screwdrivers, a timing belt tensioner tool (essential!), possibly a crankshaft pulley holder, and potentially other specialized tools depending on your approach.
* Safety: Disconnect the negative battery terminal. Use jack stands and safety stands to secure the vehicle properly. Wear safety glasses and gloves.
* Obtain parts: Source a new timing belt, tensioner pulley, idler pulleys (as needed; check their condition), and any other related parts the manual recommends replacing (water pump is a common one). Using genuine Subaru parts is highly recommended.
2. Accessing the Timing Belt:
* Remove ancillary components: This will likely involve removing various belts, pulleys, covers, and potentially other components to gain access to the timing belt. The process is intricate and involves careful removal and labeling of everything to ensure correct reassembly.
* Align the timing marks: This is CRUCIAL. The engine must be at Top Dead Center (TDC) on the compression stroke of cylinder #1. Use the appropriate markings on the crankshaft pulley and camshafts to ensure precise alignment. Misalignment will result in bent valves or other severe engine damage.
3. Removing the Old Timing Belt:
* Release tension: Use the specialized timing belt tensioner tool to release the tension on the timing belt.
* Remove the belt: Carefully remove the old timing belt, noting its routing. Take photos or make detailed sketches if necessary.
4. Installing the New Timing Belt:
* Install the new belt: Carefully route the new timing belt according to the factory manual's diagram. Ensure it's properly seated on all pulleys.
* Apply tension: Use the tensioner tool to apply the correct tension to the timing belt. This requires precise measurement and adherence to the manufacturer's specifications.
* Check alignment: Double and triple check that all timing marks are perfectly aligned.
5. Reassembly:
* Reinstall all removed components: Carefully reinstall all the components you removed earlier, ensuring everything is properly secured and torqued to the correct specifications.
* Reconnect the battery: Recheck all connections.
6. Testing:
* Start the engine: Carefully start the engine and listen for any unusual noises. Check for leaks. If everything is fine, let it run for a while to ensure the timing belt is functioning correctly.
Disclaimer: This information is for general knowledge only. Attempting this repair without the proper knowledge, tools, and experience can lead to serious engine damage and potential injury. It is strongly recommended that you have this work performed by a qualified mechanic. The complexity of this job makes it very risky to attempt without professional training and experience.
