Essential Tools:
* Timing Belt Tool Set: This is the most crucial item. It'll usually include:
* Crankshaft Holding Tool: Prevents the crankshaft from rotating while you loosen and tighten the crankshaft pulley bolt. This bolt is incredibly tight.
* Camshaft Holding Tool(s): Keeps the camshafts from rotating during belt replacement. There might be one or two depending on the specific engine. These are absolutely vital to prevent valve damage.
* Tensioner Wrench: For properly tensioning the new timing belt.
* Torque Wrench: Essential for tightening bolts to the manufacturer's specifications. Incorrect torque can lead to damage.
* Sockets and Wrenches (Metric): A complete set of metric sockets and wrenches in various sizes will be necessary. Sizes will vary depending on the specific model and engine.
* Ratchets: Various sized ratchets will be needed, including extensions and universal joints for access to hard-to-reach bolts.
* Jack and Jack Stands: To safely lift the vehicle and support it while working underneath.
* Wheel Chocks: To prevent the vehicle from rolling.
* New Timing Belt: Obviously, you'll need a new, high-quality timing belt.
* New Timing Belt Tensioner (often): It's often recommended to replace the tensioner at the same time as the belt.
* New Idler Pulley(s) (often): Similar to the tensioner, these should often be replaced to avoid premature failure. Inspect them carefully for wear.
* New Water Pump (often): While not always necessary, it's wise to replace the water pump at the same time. The labor is already involved, and a failed water pump can cause catastrophic engine damage.
* Shop Rags: For cleaning and keeping things tidy.
* Gloves: To protect your hands.
* Safety Glasses: To protect your eyes.
Highly Recommended Tools:
* Subaru Service Manual: A factory service manual for your specific year and model Impreza is invaluable. It provides detailed instructions, torque specifications, and diagrams. Don't attempt this without it.
* Pry Bar: May be helpful for removing stubborn components.
Important Considerations:
* Difficulty: This is not a beginner-level repair. If you're not experienced with engine repair, it's highly recommended to take it to a qualified mechanic. Improper installation can lead to severe engine damage, including bent valves.
* Engine Specifics: The exact tools and procedure might vary slightly depending on the specific engine (1.6L, 1.8L, 2.2L) in your 1993 Impreza.
Before you begin, consult a Subaru service manual for your specific model and engine. It's the best resource for accurate information and procedures. Improper timing belt installation can be extremely costly. If you have any doubts about your abilities, seek professional help.
