Table of Contents
Proper engine timing is essential for optimal performance and efficiency in your Subaru. Using a timing light allows you to accurately check and adjust the ignition timing. This guide will walk you through the process step-by-step.
Tools and Preparations
- Timing light compatible with your Subaru
- Screwdriver and wrenches for adjustments
- Owner’s manual for specific timing specifications
- Safety gloves and eye protection
Before starting, ensure your vehicle is on a level surface, the engine is cool, and the parking brake is engaged. Disconnect any unnecessary accessories to prevent interference.
Locating the Timing Marks
Open the hood and locate the timing marks on the crankshaft pulley and engine block. Refer to your Subaru’s manual for the exact location and specifications. Clean the marks to ensure visibility.
Connecting the Timing Light
Connect the timing light’s power leads to the vehicle’s battery—red to positive and black to negative. Attach the inductive clamp around the number one spark plug wire, which is typically the first cylinder in the firing order.
Checking the Timing
Start the engine and let it idle. Aim the timing light at the timing marks. The strobe effect will make the marks appear stationary. Compare the position of the marks to the specifications in your manual.
Adjusting the Timing
If the timing is off, loosen the distributor hold-down and rotate the distributor slightly to adjust the timing. Tighten the hold-down once the correct timing is achieved. Recheck with the timing light to ensure accuracy.
Final Steps
Turn off the engine, disconnect the timing light, and reassemble any components you removed. Take your Subaru for a test drive to confirm the engine runs smoothly with the correct timing.