Symptom Chart: Engine-Speed Related Vibrations

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 powertrain-speed related vibrations are normal though they should not be felt in the passenger compartment.

Symptom Chart

Condition	Possible Sources	Actions
0.5 order engine vibration	Engine	Symptom Chart: NVH REFER to: ENGINE .
0.5 order engine vibration	Engine	Symptom Chart: NVH REFER to: ENGINE .
First through sixth order engine vibration	Engine	Symptom Chart: NVH REFER to: ENGINE .
	Engine mounts	REFER to: ENGINE .
	Transmission/transaxle	Symptom Chart: NVH REFER to: External Controls .
	Exhaust system	Symptom Chart: NVH REFER to: Exhaust System .
Belt driven accessory drive vibration	Engine pulley	Symptom Chart: NVH REFER to: ENGINE .
	Accessory drive belt	Symptom Chart: NVH REFER to: ACCESSORY DRIVE - 2.0L Duratec-HE (110kW/150PS) - MI4 or REFER to: Accessory Drive - 2.5L Duratec (125kW/170PS).
	Coolant pump	Symptom Chart: NVH REFER to: ENGINE COOLING - 2.0L Duratec-HE (110kW/150PS) - MI4 or ENGINE COOLING - 2.5L Duratec (125kW/170PS) .
	Generator	Symptom Chart: NVH REFER to: Charging System - 2.0L Duratec-HE (110kW/150PS) - MI4 . or REFER to: Charging System - 2.5L Duratec (125kW/170PS) .
	A/C compressor	Symptom Chart: NVH REFER to: Climate Control System - Vehicles With: Dual Automatic Temperature Control (DATC) or CLIMATE CONTROL SYSTEM - VEHICLES WITH: ELECTRONIC MANUAL TEMPERATURE CONTROL (EMTC) . .