How to Align the Balance Shaft on a Highlander?
2 Answers
Highlander balance shaft alignment method is introduced as follows: 1. Align the timing mark on the shaft sprocket with the copper-plated chain link. 2. Place the timing chain on the water pump drive sprocket. 3. Adjust the last chrome-plated chain link to align with the timing mark on the exhaust side balance shaft drive sprocket. 4. Balance shaft vibration principle: (1) During the engine's working cycle, the piston moves very quickly with highly uneven speed. (2) At the top and bottom dead center positions, the piston speed is zero, while reaching maximum speed at the midpoint between dead centers.
I've been repairing cars for over twenty years, and aligning the balance shaft on a Highlander is a common job that needs to be done step by step. First, disconnect the engine power supply to ensure safety. Remove and clean the related components thoroughly, avoiding any oil contamination. There are small dots or marks on the shaft, which are crucial for alignment—they must align with the crankshaft marks. Use a wrench to rotate slowly, take your time, and ensure the position is correct before securing it. The manual has detailed diagrams, so it's best to follow them. After alignment, check the tightness—too tight can damage the engine. Finally, reassemble the parts and start the engine for testing; smooth sound means it's done right. Have all tools ready, like a torque wrench—don't skip it. It's advisable to get a helper instead of working alone to avoid mistakes and unnecessary costs.
