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 engine-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	REFER to SYMPTOM CHART: NVH
First through sixth order engine vibration	Engine	REFER to SYMPTOM CHART: NVH
	Transmission/transaxle	REFER to SYMPTOM CHART REFER to SYMPTOM CHART: POWER TRANSFER UNIT (PTU)
	Engine mounts	REFER to SYMPTOM CHART: NVH
	Transmission/transaxle mounts	REFER to SYMPTOM CHART REFER to SYMPTOM CHART: POWER TRANSFER UNIT (PTU)
	Exhaust system	REFER to SYMPTOM CHART: NVH
Belt driven accessory speed vibration	Engine pulley	REFER to SYMPTOM CHART: NVH
	Coolant pump	REFER to SYMPTOM CHART: NVH
	Generator	REFER to SYMPTOM CHART: CHARGING SYSTEM
	A/C compressor	REFER to SYMPTOM CHART: NVH
	Accessory drive belt	REFER to SYMPTOM CHART: FRONT END ACCESSORY DRIVE (FEAD)