22 · Diagnostics

Engine rumbling

Fault diagnosisEngine rumbling

ENGINE RUMBLING

1.6 TS, 2.0 TS

There is buzzing (low frequency noise) coming from the engine, whose intensity varies with the number of revs

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Carry out a road test to check the conditions which give rise to the noise	Continue to Step 3	The noise also occurs with the engine switched off (when warm)	Continue to Step 1
			The noise occurs when braking	Continue to Step 2
			The noise occurs when steering	Continue to Step 3
1	MULTI-PURPOSE VALVE CHECK	All OK	Problems met	Operation
	Check the condition of the multi-purpose valve on the fuel supply system	Continue to Step 2	Multi purpose valve faulty	Replace the valve Op. 1080E11
2	BRAKE SERVO VACUUM VALVE CHECK	All OK	Problems met	Operation
	Check the condition of the one-way valve on the brake servo vacuum pipe	Continue to Step 3	Brake servo valve faulty	Replace the valve Op. 3330D26
3	CHECK ON POWER STEERING PUMP	All OK	Problems met	Operation
	With the engine running, operate the steering to full lock in both directions	Continue to Step 4	Pump noisy	Replace the power steering pump Op. 4130B24
4	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present		Fault persists	Search for the fault starting from another symptom'

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.