How to Adjust an Alternator Bolt in a 1982 Mercedes Benz 240D

The 1982 Mercedes 240D is equipped with a 2.4-liter diesel four-cylinder engine that produces 72-horsepower and 106 foot-pounds of torque. The 1982 240D is equipped with a standard four-speed transmission, and a five-speed manual transmission is available. The alternator on the 1982 240D is responsible for charging the battery of the car. The alternator has a V-belt. separate from the air conditioning compressor. The 1982 240D alternator belt is adjusted by moving the alternator.

Instructions

1

Open the hood on the 240D. Locate the alternator on the passenger side of the engine. Loosen the upper nut on the rear of the alternator with a ratchet and socket. If you cannot fit a ratchet and socket into the space, use an open-end wrench. Loosen the bolt directly below the nut. Loosen the bottom bolt on the outer passenger side of the alternator.

2

Rotate the tensioner nut directly above the alternator. This nut faces upward slightly and toward the passenger side. Turn the tensioner one-quarter turn at a time until the alternator belt is tightened.

3

Tighten the two bolts and the nut on the rear of the alternator using a ratchet and socket or an open-end wrench. Tighten the parts snug, then turn them one-quarter turn farther to make sure they are secure. Turn the tensioner nut on the front of the alternator one-quarter to one-half turn until it is tight.