Checking the tightness of connections

The presence of puddles on the garage floor or engine, or obvious moisture under the hood or on the underside of the vehicle, suggests a leak that needs to be found and repaired immediately. It can sometimes be difficult to locate a leak, especially if the engine compartment is heavily soiled. An oil or fluid leak can also be blown back under the vehicle, giving a false impression of where the leak is.

Oil pan

Engine oil may leak from the drain plug.

Oil from the filter

Oil may seep through the base of the oil filter.

Gearbox oil

Oil can seep through the seals at the inner ends of the drive shafts.

Antifreeze

Leaking antifreeze often leaves a clear coating.

Brake fluid

Leaks in the wheels can only be from brake fluid.

Power Steering Fluid

Power steering fluid may be leaking from pipe connections on the control shelf.