Symptom Chart - Engine-Speed Related Vibrations

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When an engine-speed related vibration is present, engine, engine accessory and engine firing calculations should be carried out.

NOTE: Any assembly that is out of balance will only cause a first order vibration, it will not cause a higher order vibration.

NOTE: Some engine-speed related vibrations are normal though they should not be felt in the passenger compartment.

Condition	Possible Sources	Action
0.5 order engine vibration	Engine	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
First through sixth order engine vibration	Engine	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Transmission/transaxle	Refer to the appropriate Automatic Transmission article for the procedure. Refer to the appropriate Manual Transmission, Clutch and Transfer Case article for the procedure. Go to the Symptom Chart in the appropriate part.
	Engine mounts	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Transmission/transaxle mounts	Refer to the appropriate Automatic Transmission article for the procedure. Refer to the appropriate Manual Transmission, Clutch and Transfer Case article for the procedure. Go to the Symptom Chart in the appropriate part.
	Exhaust system	REFER to EXHAUST SYSTEM article.
Belt driven accessory speed vibration	Engine pulley	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Coolant pump	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Generator	REFER to CHARGING SYSTEM - GENERAL INFORMATION article.
	A/C compressor	REFER to CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS article.
	Power steering pump	REFER to STEERING SYSTEM - GENERAL INFORMATION article.
	Vacuum pump	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Accessory drive belt	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.