0413970010 Toyota BOLT KIT, CAMSHAFT TIMING PULLEY, Price: 8.61$, Weight: 0.08kg

Engine Timing Pulley Bolt Kit

This fastener set is used to secure the camshaft timing pulley to the camshaft. It is needed whenever the timing belt/chain area is serviced, or when old bolts show stretch, worn threads, or corrosion. Correct clamping force here keeps valve timing stable and prevents pulley movement under load.

How it works ⚙️

These bolts lock the pulley to the camshaft with precise torque. When tightened to spec, they create strong friction and alignment so the pulley rotates perfectly with the cam. This helps the belt/chain track true, maintains ignition and valve events, and reduces vibration at high RPM.

What happens if it’s broken or reused incorrectly ❗

A loose or damaged bolt can let the pulley slip, causing rough idle, loss of power, rattling, timing drift, or a no-start. In severe cases, timing can jump and lead to internal engine damage. Always replace questionable hardware and torque properly for safe, long-term reliability.

Best workshop tip

Clean threads, use the correct torque angle method if specified, and avoid mixing old and new bolts in the same pulley.

Compatibility ✅

• Altezza/Altezza Gita
• Chaser
• Cresta
• Crown Comfort/Sed
• Crown/Crown Majesta
• Mark 2
• Mark 2/Mark 2 Blit
• Verossa