🚗 Classic Fault — Mercedes-Benz W115 (1968–1976)
Cam follower wear causing noisy valvetrain
💰 Estimated Repair Cost
$40 – $150 USD
Parts and labour estimate
🔧 Tools Required
Feeler gauges, cam follower tool, micrometer
📋 Overview
The M115 uses bucket-type cam followers with adjustable shims. As followers wear, valve clearances increase beyond specification causing a noisy, ticking valvetrain.
🩺 Symptoms
- Persistent ticking from top of engine
- noise worse when cold
- noise does not reduce with oil level changes
🔍 Possible Causes
- Worn cam followers
- incorrect valve clearance
- worn camshaft lobes
🛠️ Diagnosis Steps
Check valve clearances with engine cold. Inlet: 0.10mm, Exhaust: 0.25mm.
✅ Most Confirmed Fix
Adjust valve clearances using correct shim thicknesses.
78% of users confirm this fix worked (21 reports)
🏷️ Parts Needed
Valve shim set for M115
🔗 Other Mercedes-Benz W115 Faults
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