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Início » Glossary Terms » Is it common for the TU5 (1.6 16V) engine in the C3 and C4 to leak oil? What is the most common part that causes this leak and how can it be fixed?

Is it common for the TU5 (1.6 16V) engine in the C3 and C4 to leak oil? What is the most common part that causes this leak and how can it be fixed?

Yes, the oil spill It is a chronic and fairly common problem in PSA naturally aspirated engines, such as the TU5JP4 and the EC (1.6 16V), after reaching approximately 80,000 km or more.

The most frequent cause is dryness of the Valve Cover Gasket (or cylinder head cover), which is responsible for sealing the top of the engine, preventing oil from splashing out. With heat and age, the rubber of the gasket loses its elasticity and begins to allow oil to leak out the side of the engine.

Solution: The repair is relatively simple and inexpensive, requiring the valve cover gasket replacement. However, it is essential that the surface of the lid and head is perfectly clean and dry and that the tightening of the screws be carried out with the torque wrench and in the correct sequence, according to the manufacturer’s specifications. In some cases, the use of a high-temperature silicone (such as black or gray silicone) in critical areas may be recommended.

Neglecting this leak can lead to the timing belt burning out (if the oil reaches the component) or to environmental problems and dirt in the engine.

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