Symptom Chart - Engine-Speed Related Vibrations

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. 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 AUTOMATIC TRANSAXLE/TRANSMISSION - CD4E article, AUTOMATIC TRANSAXLE/TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (ECVT) article or MANUAL TRANSAXLE/TRANSMISSION AND CLUTCH - GENERAL INFORMATION article.
	Engine mounts	REFER to ENGINE SYSTEM - GENERAL INFORMATION article.
	Transmission/transaxle mounts	REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - CD4E article, AUTOMATIC TRANSAXLE/TRANSMISSION - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (ECVT) article or MANUAL TRANSAXLE/TRANSMISSION AND CLUTCH - GENERAL INFORMATION article.
	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 or CLIMATE CONTROL SYSTEM - GENERAL INFORMATION AND DIAGNOSTICS - HYBRID 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.