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Home >> Pontiac >> 2003 >> Vibe Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Basic Diagnostic Procedures >> Preliminary Inspection & Adjustments >> Mechanical Inspection >> Notes
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Mechanical Inspection: Notes

WARNING: Because fuel injectors on many models are triggered by ignition switch during cranking mode, DO NOT use ignition switch during compression tests. Use a remote starter to crank engine to prevent fire hazard or engine oiling system contamination.
CAUTION: This engine is equipped with an aluminum cylinder head. Allow the engine to cool to room temperature before removing spark plugs. Removing the spark plugs from an engine at operating temperature may damage the spark plug threads in the cylinder head. Also be sure to clean any dirt or debris from around spark plug holes prior to removing spark plugs.