🚗 Classic Fault — Mercedes-Benz W116 (1972–1980)
W116 M117 V8 timing chain rattle on cold start
💰 Estimated Repair Cost
$150 – $500 GBP
Parts and labour estimate
🔧 Tools Required
Timing chain tools, torque wrench
📋 Overview
The single-row timing chain on the M117 V8 stretches with mileage. Cold start rattle is the first symptom.
🩺 Symptoms
- Metallic rattling from front of engine on cold start
- rattle takes 20-40 seconds to clear
- rattle worsens over time
🔍 Possible Causes
- Stretched timing chain
- worn chain tensioner
- worn chain guides
🛠️ Diagnosis Steps
Time cold start rattle duration — increasing duration indicates progressive wear. Inspect via timing cover if rattle persists warm.
✅ Most Confirmed Fix
Timing chain and tensioner replacement
83% of users confirm this fix worked (19 reports)
🔗 Other Mercedes-Benz W116 Faults
Own a Mercedes-Benz W116?
Share your experience with this fault — or report a different issue. Your knowledge helps other classic car owners worldwide.