- Open the filler cap and check the seal for porosity and damage.
- Crankcase ventilation system: for example, check the hoses from the crankcase to the camshaft housing and from the camshaft housing to the air manifold.
- Cylinder head cover seal.
- Cylinder head seal.
- Oil filter seal: the place where the oil filter housing is attached to the flange.
- Drain plug (tightness).
- Hydraulic switch (tightness).
- Oil pan seal.
- Front and rear crankshaft and camshaft oil seals.
Since the leak usually spreads over a large area, it was quite difficult to determine the leak location at first glance. When searching for leak locations, it is advisable to proceed as follows:
Wash the engine. Spray the engine with a standard cleaning agent, after a while wash everything off the engine with a stream of water. Cover the generator with polyethylene film beforehand.
Note: For environmental reasons, most areas prohibit car washing in open areas. However, many petrol stations offer the option of steaming your car. Since these stations ensure that dirty water does not penetrate the ground, you should wash your car there.
Sprinkle the connection points and seals on the outside of the engine with chalk or talcum powder.
Check the oil level and top up if necessary.
Perform a test drive. Since the oil in a hot engine becomes liquid and therefore leaks out faster, it is recommended to perform a test drive on a section of approximately 30 km on a high-speed highway.
Finally, inspect the engine using a lamp, find any leaks and troubleshoot.