HomePostsDriver NotesVideosContact
Engine
Drivisual Tv
AuthorDrivisual Tv

1.2 PureTech Engine Guide: Common Faults, Symptoms, and Definitive Solutions

1.2 PureTech Engine Guide: Common Faults, Symptoms, and Definitive Solutions

As one of the most debated units in the automotive world, the 1.2 PureTech engine family stands out for its low fuel consumption but requires highly sensitive maintenance due to its operating principles. We had already examined this engine in detail in our previous article [link], and now we will discuss how a 1.2 PureTech engine should be used, what the buying recommendations are, and the definitive solutions to these problems.

We have summarized the ways to protect yourself from the malfunctions frequently encountered in 1.2 PureTech engine reviews and evaluations item by item.

1.2 PureTech Engine Common Faults and Oil Dilution

The weakest point of this engine is the "Wet Belt" (timing belt working in oil) system. The dreaded 1.2 PureTech timing belt problem basically develops as follows:

  • Short Distance Effect: In short-distance drives (especially stop-and-go city traffic) before the engine fully warms up, unburned gasoline leaks into the crankcase and mixes with the engine oil. 
  • Chemical Decay: The gasoline mixed into the oil ruins the chemical structure of the timing belt, causes it to swell, and leads to micro rubber particles shedding from its surface. 
  • Clogging and Pressure Loss: These broken pieces clog the oil pump strainer, causing the oil pressure in the system to drop. This situation leaves vital engine parts and the vacuum pump supporting the brake system without oil. 

Timing Belt Failure Symptoms and Causes

The deterioration in the system does not happen all at once. When reviewing Citroen C3 1.2 PureTech common faults or Peugeot 2008 1.2 PureTech 130 hp user reviews, the following critical symptoms indicating an impending failure stand out:

  • Warning Lights: A sudden "Low Oil Pressure" warning appearing on the dashboard and the illumination of the "Check Engine" light. 
  • Noise and Vibration: A metallic rattling sound heard for 2-3 seconds when first starting the engine cold, idle fluctuation, and rough running.
  • Performance and Brakes: Sudden loss of performance and power felt during acceleration, and a brake pedal that becomes rock hard due to the drop in oil pressure. 
  • Causes of Failure: 60% of cases are caused by constant short-distance driving, 30% by neglecting oil changes, and 10% by using the wrong engine oil. These neglects can lead to premature wear of the chain tensioner even in the newer chain-driven PureTech versions.

Driving and Maintenance Rules for Trouble-Free Use

Extending the life of your Peugeot 1.2 PureTech engine depends on a few simple precautions you can take:

  • Perform Thermal Cleaning: If you only use the car for short distances in the city, drive the vehicle uninterrupted at highway speeds for 20-30 minutes at least once a week. This process fully heats the engine, evaporates the gasoline mixed in the oil, and relieves the belt. 
  • Use the Correct RPM: Bogging down the engine at very low RPMs in high gears causes more fuel to leak into the oil. Allow the vehicle to rev comfortably.
  • Mandatory Oil Update: The 1.2 PureTech engine oil must absolutely not be the older generation thin oils (0W-20 / 0W-30). To protect the belt, only Stellantis FPW9.55535/03 approved 5W-30 fully synthetic oils must be used. Also, oil changes should never wait for 15,000 km; they must be done every 10,000 km at the maximum. 
  • The 40,000 Km Rule: Although factory maintenance intervals are long, field data and experts highly recommend that the timing belt be thoroughly inspected and replaced around the 40,000-mile (approximately 64,000 km) mark. 
  • Post-Replacement Break-in: It should not be forgotten that the 1.2 PureTech timing belt replacement price can severely strain your budget in case of heavy damage. After the replacement, drive the car gently at low RPMs for the first 1,000 km, and be sure to change the engine oil again after 5,000 km to flush out any potential micro shavings.

Things to Consider When Buying a Second-Hand 1.2 PureTech

So, should you buy a Citroen C3 1.2 PureTech, or what should we look out for when buying a Peugeot 208 1.2 PureTech? Whether you are researching the city classic C3 1.2 PureTech, the popular SUV Peugeot 2008 1.2 PureTech, or the recent favorite Citroen C4X 1.2 PureTech reviews, do not skip the following steps during the inspection, aside from the bodywork:

  • Visual Gauge Check: The timing belt is located right under the oil filler cap. At an expert service, the belt must absolutely be measured with a special width gauge (G-0109-6) to see if it has swollen. 
  • Sump Strainer Inspection: Your very first task after buying the car (or before buying, if you are suspicious) should be having the oil pan removed to inspect the oil pump strainer. If there are black rubber deposits in the strainer, the belt has begun to disintegrate and must be replaced urgently.
  • Brake Vacuum Test: When test driving, brake hard in a safe, closed-traffic area. If the brake pedal becomes unusually stiff, the system has lost oil pressure, meaning the brake vacuum pump has failed. (The same rules apply to new-generation buyers looking into Citroen C4 1.2 PureTech reviews, unless the vehicle has a timing chain). 
  • Error Codes: Have a diagnostic tool connected to the vehicle's ECU to check if there are any previously cleared low oil pressure warning codes, such as "P0520".

In summary; The 1.2 PureTech is not an engine to be driven with a "use-and-throw" mentality. If you act as a conscious consumer, use the correct oil, narrow the timing belt inspection intervals, and give the vehicle a chance to warm up properly, this engine will offer you quite an economical and enjoyable driving experience.

Image Source: Wikimedia Commons