2. Visually inspect engine mating surfaces, gaskets and seals for signs of water or oil leaks. Pay particular attention to the areas around the mating surfaces of the cylinder head cover, cylinder head, oil filter and engine sump. Keep in mind that it is inevitable that some very minor leaks will occur in these areas over time, and you are looking for signs of a major leak. If one is found, replace the faulty gasket or oil seal by referring to the relevant chapters of this manual.
3. Also check the tightness and condition of all engine pipes and hoses. Check that all clamps or clips are installed correctly and in good condition. Broken or missing clamps can cause chafing of hoses, pipes, or wiring, leading to more serious problems in the future.
4. Carefully check the radiator and heater hoses along their entire length. Replace all cracked, bulging or otherwise damaged hoses. The cracks become more visible if the hose is compressed. Pay special attention to the clamps securing the hoses to the cooling system components. These clamps can pinch and puncture hoses, causing leaks. If the original Peugeot/Citroen crimp-type clamps are used to secure the hoses, it is recommended to replace them with worm-type clamps (with screw).
5. Inspect all components of the cooling system for leaks (hoses, mating surfaces, etc.).
Tip: A cooling system leak will usually show up as white or rusty deposits in the area near the leak.
6. If there is any defect, replace the element or gasket as specified in chapter 3.
7. With the vehicle raised, inspect the fuel tank and its filler neck for pinholes, cracks, and other damage. The connection between the filler neck and the tank is especially important. Sometimes the rubber section of the filler neck or connecting hose leaks due to loosening of the clamps or aging of the rubber.
8. Carefully check all rubber hoses and metal fuel lines coming from the fuel tank. Check for loose connections, deterioration of hoses, pinched lines, or other defects. Pay special attention to ventilation pipes and hoses, which often pass near the filler neck and may be clogged or pinched. Carefully inspect the entire length of the lines leading to the front of the vehicle. Replace damaged areas if necessary.
(Original publication on the website: PEUGEOTBOOK)
9. In the engine compartment, check the fastening of all fuel lines and vacuum lines and the fittings of the pipelines and inspect all hoses: there are no kinks, chafing or other defects.
10. Check the condition of the power steering lines and hoses (if applicable).
11. Finally, install the engine cover (if applicable).