Checking The Air Leakage

Connect the compressed air hose and adjust the regulator so that a max. pressure of 0.2 bar is obtained.

A weak hissing sound can be heard through the oil filler, this is due to an intake valve being open and the pressure in a cylinder leaking past the piston rings.

Spray soap and water solution if uncertain if leaks exist

Small bubbles are permitted between the throttle body (TB) and the inlet hose if it is plastic. If the inlet hose is rubber then no bubbles are permitted.

Rectify any leakage.