Workshop Manuals Factory service & repair Fiat
01 General information02 Specifications03 Manufacturing data and tolerances04 Tightening torques05 Fluids and lubricants06 Maintenance07 Diagnostic checks08 Engine09 Clutch10 Gearbox and differential11 Axles and driveshafts12 Brakes13 Steering14 Suspension and wheels15 Heating, air conditioning and auxiliary units16 Electrical equipment17 Body fittings18 Body panels and frame19 Wiring diagrams and electrical functions20 Wiring harnesses21 Connectors and pin-outs22 Fault diagnosis23 Special tools
Fiat 500 Factory Service Manual (2007-2024)22 · Fault diagnosis
22 · Diagnostics

Engine hissing

Make
Fiat
Model
500 Factory Service Manual
Year
2007–2024
Section
Noise / vibrations › Engine hissing
Fault diagnosisEngine hissing

ENGINE HISSING

1.2 8v, 1.3 Multijet, 1.4 16v

There is a low frequency noise coming from the engine, the intensity of which varies with the number of revs.

Test results
1AIR INTAKE CIRCUIT CHECKAll OKProblems encounteredOperation
Check the condition and seal of the air intake systemMove on to Step 2Circuit component damaged.Replace the damaged component.
2ENGINE EXHAUST CHECKAll OKProblems encounteredOperation

Check the engine exhaust system, in particular:

  • Manifold
  • Pipe
  • Exhaust silencer
  • Catalytic converter front gasket.
End of diagnosis

1. Pipe damaged.

2. Rear silencer damaged

3. Front gasket worn or damaged.

1. Replace the pipe.

2. Replace the rear silencer

Op. 1076B20 REAR EXHAUST SILENCER - R + R

3. Replace the front gasket.

Parts & tools for this job For 2007 Fiat 500

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