Engine - MIL ON And Low Coolant Lamp ON
Check engine light (CEL) on and low coolant indicator lamp lights upTopic number LI01.30-P-051567
Version 1
Design group 01.30 Cylinder head
Date 04-14-2011
Validity M156 up to engine # 569xx 60 060658
Reason for change
Complaint:
CEL illumination, engine misfire, stalling, rough running low coolant indicator lights up.
No external coolant loss detectable. Coolant in the engine oil and/or in the combustion chamber
Cause:
Cylinder head bolt broken. Engine coolant enters into engine oil. Coolant might be present in the combustion chamber. Affected engine number up to 1569xx 60 060658
Remedy:
1. Remove cylinder heads.
2. Measure piston deck height (specified value: 0.18 mm +/- 0.05 mm). If the measurement from the top surface of the cylinder crankcase to the top surface of the piston is outside of the specification (the maximum deck height is 0.23 mm), the affected connecting rod with piston and bearings must be replaced.
3. Replace all cylinder head bolts.
4. Replace all hydraulic tappets.
5. Change engine oil and filter and replenish engine coolant.
6. Another oil change must be performed after about 15 mile test drive (engine must run at operating temperature).
Symptoms
Parts
Work units
WIS-References