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Alternator Replacement
 
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Pelican Technical Article:

Alternator Replacement

Nick Czerula

Time:

3 hours3 hrs

Tab:

$200

Talent:

*****

Tools:

Set of sockets 12mm, 13mm, 14mm, flathead screwdriver, 14mm wrench

Applicable Models:

Volvo V70 (1998-01)
Volvo V70 2.4T (2001)
Volvo V70 AWD (1998-99)
Volvo V70 GLT (1998-00)
Volvo V70 GLT SE (2000)
Volvo V70 R (1998)
Volvo V70 R AWD (1999-00)
Volvo V70 T5 (1998-01)
Volvo V70 X/C (2001)
Volvo V70 X/C AWD (1998-00)
Volvo V70 X/C AWD SE (2000)

Parts Required:

Alternator, drive belt

Hot Tip:

Work with a cool engine

Performance Gain:

Car will charge properly

Complementary Modification:

Change serpentine belt, tensioner

A faulty or failing alternator can cause many problems, from a simple discharging of the battery to an engine drivability problem. There are a few signs and tests you can perform to determine if the alternator is the root cause of your problem. If you get lucky, your battery light (charging system indicator) will illuminate to warn you of a possible failure. When the battery light (charging system indicator) is ON, this means a voltage difference has been detected between battery positive (+) constant (terminal 30) and the ignition ON circuit (terminal 15), indicating a fault in the charging system.

It is common for an alternator to fail slowly. When this happens your symptoms will be present when the electrical system has the highest load, i.e., at night. Driving at night, you may notice the instrument panel lights dim, or the radio or headlights flicker. This is a good indication that the alternator cannot handle the excess load. Another sign of a charging system problem is that the headlights or radio dim when lowering your window. When the alternator can no longer charge the battery, you may park your vehicle and not be able to start it. Of course, this could be a faulty battery too.

Always check the voltage of your charging system under load. Voltage should be within 13.2: 14.5 volts d/c. To load, have the engine running at idle. Turn on the headlights and the HVAC blower motor. Never disconnect a battery cable while the engine is running to test the alternator. You may cause damage to the alternator or other electrical components from the surge in amperage. Before performing any tests of your alternator, charge and test your battery. If the battery is faulty, your alternator tests will not be accurate.

In this article, I'll go over the steps involved with replacing the alternator on the Volvo V70 base models with a normally aspirated 5-cylinder engine. V70 models with 5-cylinder engines may be equipped with one of several different alternators with different amperage ratings. Be sure your replacement alternator has the same rating as the faulty unit. You can usually find the amperage rating on the alternator housing.

Remember that your car may have been serviced before and had parts replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

Be sure to work with a cool engine and disconnect the battery before beginning.

Disconnect the battery negative cable and cover the battery terminal so the cable does not accidentally come in contact with the disconnected cable. See our tech article on battery replacing for notes on disconnecting and reconnecting the battery.

The alternator on Volvo V70 models with a normally aspirated 5-cylinder engine is located on the right side of the engine (green arrow).
Figure 1

The alternator on Volvo V70 models with a normally aspirated 5-cylinder engine is located on the right side of the engine (green arrow).

Start by removing the power steering pump.
Figure 2

Start by removing the power steering pump. See our tech article on power steering pump removing. Then remove the drive belt (green arrow) from the alternator pulley.

Working at the back of the alternator, remove the electrical connector (green arrow) by pulling it straight out of the alternator.
Figure 3

Working at the back of the alternator, remove the electrical connector (green arrow) by pulling it straight out of the alternator. Then remove the plastic cover (red arrow) and remove the 13mm nut behind it (yellow arrow).

Lift and support the front of your vehicle.
Figure 4

Lift and support the front of your vehicle. Then remove the two 10mm splash shield fasteners (green arrows).

Press the plastic clip (green arrow) through the radiator support.
Figure 5

Press the plastic clip (green arrow) through the radiator support. Then remove the splash shield from the vehicle (red arrow).

Next, move to the right side of the engine.
Figure 6

Next, move to the right side of the engine. Loosen the two 12mm lower A/C compressor fasteners (green arrows) until they stick out about one-inch.

Then detach the duct from the E-box and move it aside (green arrow).
Figure 7

Then detach the duct from the E-box and move it aside (green arrow).

Next, disconnect the A/C pressure switch by pressing the wire retainer and pulling it straight off the line (green arrow).
Figure 8

Next, disconnect the A/C pressure switch by pressing the wire retainer and pulling it straight off the line (green arrow).

Working below the alternator (red arrow), remove the two 12mm A/C compressor fasteners (green arrows).
Figure 9

Working below the alternator (red arrow), remove the two 12mm A/C compressor fasteners (green arrows). The A/C compressor bolts attach the lower part of the alternator to the engine. Be sure they are removed before trying to get the alternator out.

Working at the top of the alternator, remove the 12mm fastener (green arrow).
Figure 10

Working at the top of the alternator, remove the 12mm fastener (green arrow).

Now the alternator can be removed.
Figure 11

Now the alternator can be removed. Slide it up and out from behind the compressor. Then feed it up through the coolant hose. Tilt the pulley up and remove it (green arrow). Install a new alternator. Then install the fasteners and tighten. Attach the electrical connections to the back of the new alternator and tighten. Install the drive belt and check that the belt is properly aligned in the alternator pulley. Then reassemble the remaining items in the reverse order of the removing steps. Check the operation of the charging system and alignment of the drive belts.

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