Your service manual will recommend jacking points The most common way to elevate the car is a floor jack, or trolley jack. If you are unsure how to use one visit Lift a Car Using a Trolley Jack. You should use jack stands to stabilize the car. A good tutorial on jack stands can be found at Use Jack Stands. If you have access to a hydraulic lift it will save you time.
When there’s no protruding item, follow the above steps for locating a leak and then mark it.
