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The battery in your 8-cylinder Cadillac is dead. A motoring Good Samaritan rolls up and offers you a jump start with his 4-cylinder Japanese import. What are the chances that the 4-cylinder car can start the Cadillac with 8-cylinders?

Background

Jump starting is not about cylinders; it is about power--power expressed in terms of voltage and the amount necessary to crank the engine of a disabled car.

Voltage and Power

A battery stores power as the engine runs and sends a trickle charge to the battery. The power to start a car is delivered by the stored power. If the 4-cylinder car battery is good, it will work.

Safe Jump Start

The jumper cables must be placed correctly for a safe jump start with both car engines off and emergency brakes set. Connect the red/+ cable to the red terminal of the dead battery. Connect the other end of that cable to the red terminal of the good battery. Connect one end of the black/- cable to the good battery. Connect the other end of this cable to a piece of unpainted metal in the engine compartment of the car with the dead battery. Do not connect it to the black battery terminal. Start the car with the good battery and rev the engine. Attempt to start the car with the dead battery. If it starts, remove the cables in the reverse order they were placed.

What Starts the Dead Engine?

Once the jumper cables are correctly in place, the 8-cylinder car is started using the voltage supplied by the engine of the 4-cylinder car. Once the 8-cylinder car is running smoothly and jumper cables are removed drive the car with the dead battery to recharge it. You may want to take it to a place where battery service is offered and have it checked.

The Jetta is a small family car that Volkswagen has manufactured since 1979, and the third generation of this series includes the 1993 through 1999 models. The GL trim level for the 1999 Jetta features Volkswagens AAA engine, a six-cylinder 2.8-liter engine with two valves per cylinder. The coolant pump for the 1999 Jetta circulates water and coolant through the engine to prevent the engine from overheating. To remove the water pump from an AAA engine, you will need an engine hoist to access the coolant pump.

Instructions

1

Disconnect the cable from the negative battery terminal with a socket wrench. Place a container under the radiator drain and remove the drain plug. Drain the coolant from the radiator and replace the drain plug. Disconnect the air cleaner assembly.

2

Mark the accessory drive belt to indicate its direction of rotation. Hold the drive belts pulley in place and remove the drive belt. Disconnect the the exhaust pipe from the catalytic converter with a socket wrench.

3

Remove the mounting bolts for the coolant reservoir and move it out of your way. Disconnect the mounting bolts for the rear engine mounts and the coolant pump. Raise the engine from its rear mounts with an engine hoist and remove the coolant pump.