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Jeep TSB #0901222
2018 Jeep Wrangler
TSB Document:
Affected Component: ENGINE AND ENGINE COOLING
- Summary
- Spark Knock/Engine Symptoms This bulletin involves cleaning the piston heads and cylinder head combustion chambersto resolve a spark knock condition being caused by oil intrusion through the PCV system. The customer may describe a knocking or pinging noise coming from the engine upon acceleration.
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