What is the metric bolt and nut size for main mounting bolt on alternator for 1997 Nissan 4x4 thruck with 2.4 L engine?

This answer covers:
2005 Chrysler 300 6cyl VIN "G" 3.5L SFI HO (72% of 2005 300's)
2005 Chrysler 300 6cyl VIN "R" 2.7L MFI DOHC (28% of 2005 300's)
2005 Dodge Magnum 5.7L engine

Alternator

Removal & Installation


WARNING - Precautions Section:
Disconnect negative cable from battery before removing battery output wire (b+ wire) from alternator. Failure to do so can result in injury or damage to electrical system.

2.7L Engine

1. Before servicing the vehicle, refer to the Precautions section.
2. Disconnect negative battery cable.
3. Remove alternator drive belt.
4. Disconnect alternator field circuit plug.
5. Remove B+ terminal nut and wire.
6. Remove 2 lower mounting bolts.
7. Remove alternator.

To install:

1. Install alternator.
2. Install upper bolt mounting bolt.
3. Install 2 lower mounting bolts.
4. Tighten bolts to 48 ft. lbs. (65 Nm).
5. Install B+ terminal nut and wire. Tighten nut to 115 inch lbs. (13 Nm).
6. Connect alternator field circuit plug.
7. Install alternator drive belt.
8. Connect negative battery cable.

3.5L Engines

1. Before servicing the vehicle, refer to the Precautions section.
2. Disconnect negative battery cable.
3. Remove alternator drive belt.
4. Remove bracket bolts.
5. Remove upper mounting bolt.
6. Raise and support vehicle.
7. Remove middle splash pan.
8. Disconnect alternator field circuit plug.
9. Remove B+ terminal nut and wire.
10. Remove lower mounting bolts.
11. Remove alternator.

To install:

1. Install alternator.
2. Install lower mounting bolts. Loosen install the upper mounting bolt.
3. Tighten lower mounting bolts to 48 ft. lbs. (65 Nm).
4. Connect alternator field circuit plug.
5. Install B+ terminal nut and wire. Tighten nut to 115 inch lbs. (13 Nm).
6. Install middle splash pan.
7. Lower vehicle.
8. Remove loose installed upper bolt.
9. Install bracket and bracket bolt.
10. Install upper mounting bolt and bracket.
11. Tighten upper mounting bolt to 48 ft. lbs. (65 Nm).
12. Tighten the bracket bolt to 40 ft. lbs. (54 Nm).
13. Install alternator drive belt.
14. Connect negative battery cable.

5.7L Engines

1. Before servicing the vehicle, refer to the Precautions section.
2. Disconnect negative battery cable at battery.
3. Remove alternator drive belt.
4. Raise and support vehicle.
5. Unsnap plastic insulator cap from B+ output terminal.
6. Remove B+ terminal mounting nut at rear of alternator. Disconnect terminal from alternator.
7. Disconnect field wire connector at rear of alternator by pushing on connector tab.
8. Remove alternator support bracket nut and bolt. Remove support bracket. See Figure 1.
9. Remove 2 alternator mounting bolts. See Figure 2.
10. Remove alternator from vehicle.

Fig. 1 Alternator Support Bracket - 5.7L engine



Fig. 2 Alternator Mounting Bolts - 5.7L engine

12 mm

FIRST TURN OFF RADIO THEN DISCONNECT NEGATIVE BATTERY CABLE.IF YOU HAVE 2.7L ENGINE YOU HAVE TO REMOVE LOWER PLASTIC SPLASH SHIELD, REMOVE TRANSMISSION COOLER AND POSITION IT ASIDE.LOWER RADIATOR CROSSMEMBER SUPPORT, LOOSEN DONT REMOVE,ADJUSTING T BOLT AND THE PIVOT BOLT LOOSEN BELT ADJUSTING BOLT, REMOVE DRIVE. REMOVE ALTERNATOR FIELD CIRCUIT PLUG. REMOVE ALTERNATOR BATTERY PLUS TERMINAL NUT AND WIRE REMOVE.PIVOT BOLT SPACER CAREFUL DONT DROP LOSE SPACER. THEN REMOVE ALTERNATOR. YOU NEED BELT TENSION GAUGE TORQUE ADJUSTING T BOLT UNTIL TENSION GAUGE READS 120 LBS USED BELT NEW BELT 180 - 200 LBS. YOU NEED ALL BASIC MECHANIC TOOL SET WITH METRIC SOCKETS METRIC OPEN BOX END WRENCHES.SIZE WRENCH RANGE 5MM UP TO 19MM NEED ADJUSTABLE PLIERS NEED SCREW DRIVERS LIKE FLAT HEAD AND PHILLIPS. YOU NEED TORQUE WRENCH. FOR THE PIVOT BOLT NEED TORQUE TO 40 FT LBS. THE 8MM MOUNTING BOLT TO 30 FT LBS. 10MM BOLT TO 40 FT LBS.

START FROM 10 METRIC SOCKET UP TO 13 METRIC EGR VALVE BOLTS NOT LARGE BOLTS.

Things You'll Need:

• Battery terminal wrench
• Serpentine belt removal tool
• 3/8-inch ratchet
• 3/8-inch metric socket set

1. Turn off the engine and place the transmission in park (automatic) or first gear (manual). Engage the parking brake and open the hood. Disconnect the negative cable from the battery terminal using the battery terminal wrench.
   

2. Remove the serpentine belt by inserting the end of the serpentine belt tool into the square hole on the belt tensioner and rotating the removal tool clockwise. Unplug the alternator's electrical connector. Remove the bolt holding the positive voltage cable to the alternator using a 3/8-inch ratchet and a metric socket. Remove the positive voltage cable from the alternator.
   

3. Remove the alternator bracket bolts using a metric socket connected to a 3/8-inch ratchet. Remove the alternator from the car. Place the new alternator in the mounting brackets and reinstall the mounting bolts using a 3/8-inch ratchet connected to a metric socket.
   

4. Reinstall the positive voltage cable on the alternator and tighten the retaining nut using a 3/8-inch ratchet and a metric socket. Plug in the alternator's electrical connector. Compress the serpentine belt tensioner using the serpentine belt tool. Reinstall the serpentine belt according to the belt-routing diagram located under the hood.
   

5. Reconnect the negative cable to the battery using the battery terminal wrench. Start the engine and verify that the alternator works.
   

REMOVAL & INSTALLATION
2.2L Engines
CHRYSLER ALTERNATOR

1. Disconnect the negative battery cable.
2. Label and disconnect the wiring (for easy installation).
3. Remove the air conditioning compressor drive belt, if equipped.
4. Loosen the alternator adjusting bracket bolt and adjusting bolt. Remove the alternator belt.
5. Remove the bracket and mounting bolts.
6. Remove the pivot bolt and nut.
7. Lift the alternator from the vehicle.
   

When lifting the alternator out of the vehicle on some years with A/C, clearance may be restricted by the condenser cooling fan assembly or the A/C compressor and mounting bracket assembly, if so, removal of one of these items will be necessary.

To install:

1. Position the alternator against the engine.
2. Install the pivot bolt and nut.
3. Install the mounting bracket bolts, and adjusting bolt.
4. Install drive belts and adjust to specification.
5. Tighten all the mounting bolts and nuts.
6. Connect all alternator terminals.
7. Connect the negative battery cable.

BOSCH ALTERNATOR

1. Disconnect the negative battery cable.
2. Disconnect the wiring and label for easy installation.
3. Remove the air conditioning compressor drive belt.
4. Loosen the alternator adjusting bracket locknut and adjusting screw. Remove the alternator belt.
5. Remove the bracket locknut and mounting bolt.
6. Remove the pivot bolt and nut.
7. Remove the alternator from the engine.

To install:

1. Position the alternator against the engine.
2. Install pivot bolt and nut.
3. Set the mounting bracket in place and install the bracket mounting bolt and locknut.
4. Install the drive belts and adjust to specification.
5. Tighten all the mounting bolts and nuts.
6. Connect all alternator terminals.
7. Connect the negative battery cable.

2.5L Engines
2.5L engines were equipped with either Chrysler or Bosch alternators.

1. Disconnect the negative battery cable.
2. Remove the drive belts.
3. Remove the adjusting bracket-to-engine mounting bolt.
4. Remove the adjusting locking bolt and nut, then remove the mounting bracket.
5. Position the alternator to gain access to the wiring.
6. Disconnect the wiring and label for easy installation.
7. Remove the pivot bolt, nut, and washers.
8. Remove the alternator assembly from the engine.
   

To install:

1. Position the alternator assembly against the engine.
2. Loosely install the pivot bolt, washers, and nut.
3. Attach all wiring connectors to the alternator.
4. Position the mounting bracket in place, then install engine mounting bolt.
5. Loosely install the adjusting locking bolt and nut.
6. Install the drive belts, and adjust to specification.
7. Tighten all mounting bolts and nuts.
8. Connect the negative battery cable.
   

2.6L Engines
2.6L engines were equipped with Mitsubishi alternators.

1. Disconnect the negative battery cable.
2. Disconnect the wiring and label for easy installation.
3. Remove the adjusting strap mounting bolt.
4. Remove the drive belts.
5. Remove the support mounting bolt and nut.
6. Remove the alternator assembly.

To install:

1. Position the alternator assembly against the engine, then install the support bolt.
2. Install the adjusting strap mounting bolt.
3. Install the alternator belts and adjust to specification.
4. Tighten all the support bolts and nuts.
5. Connect all of the wiring terminals to the alternator.
6. Connect the negative battery cable.

3.0L Engines
The 3.0L engines were equipped with either the Nippondenso or Bosch alternators.

1. Disconnect the negative battery cable.
2. Install a 1 / 2 in. breaker bar in the tensioner slot. Rotate counterclockwise to release belt tension and remove poly-V belt.
3. Remove the alternator mounting bolts (2).
4. Remove the wiring and remove alternator.
   

To install:

1. Position the alternator onto the engine, then install the wiring.
2. Set the alternator against the mounting bracket and install the mounting bolts.
3. Rotate the tensioner counterclockwise and install poly-V belt.
4. Connect the negative battery cable.
   

3.3L and 3.8L Engines
The 3.3L and 3.8L engines were equipped with the Nippondenso alternators.

1. Disconnect the negative battery cable.
2. Remove the alternator drive belt, by relieving the tension on the dynamic tensioner.
3. Loosen the nut on the support bracket at the exhaust manifold, do not remove it.
4. Remove the alternator tensioner/power steering bracket bolt.
5. Remove the tensioner stud nut and remove the tensioner.
6. Remove the alternator mounting bolts.
7. Remove the power steering reservoir from the mounting bracket, do not disconnect the hoses, and position it out of the way.
8. Remove the alternator support bracket bolts. Remove the intake plenum to alternator bracket bolt and remove the alternator support bracket from the engine.
9. Remove the alternator from the engine and disconnect the electrical leads.
   

To install:

1. Install the alternator in position on the engine and connect the electrical leads.
2. Install the alternator support bracket, tighten the retaining bolts to 40 ft. lbs. (54 Nm).
3. Install the power steering reservoir on the mounting bracket.
4. Install the alternator mounting bolts, tighten the bolts to 40 ft. lbs. (54 Nm).
5. Install the tensioner and tensioner mounting stud. Install the retaining nut on the exhaust manifold.
6. Install the alternator belt, insert a 1 / 2 in. extension into the square hole in the tensioner and turn the tensioner. Tighten the tensioner bolt.
7. Connect the negative battery cable.

Hope this help (remember comment and rated this).

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3.3L Engine

1. Disconnect the battery negative - cable.

Fig. Wiring and nut locations

1. Disconnect the alternator field circuit plug.
2. Remove the B+ terminal nut and wire.
3. Loosen the adjusting T-bolt, but do not remove it.
4. Loosen the pivot bolt, but do not remove it either.
5. Remove the alternator drive belt.
6. Remove the adjusting T-bolt, pivot bolt, and mounting bolt, be careful not to loose the spacer.
7. Remove the alternator.

To install:

1. Attach the alternator to the support bracket. Tighten all bracket and alternator (except for the wiring nuts) bolts to 40 ft. lbs. (54 Nm).
2. Install the B+ terminal nut and wire and tighten to 75 inch lbs. (9 Nm).
3. Install the drive belt onto the alternator pulley. Make certain that the belt is seated correctly on the pulley.
4. Connect the negative - battery cable.

3.5L Engine

1. Disconnect the negative battery cable.
2. Loosen the lower mounting bolt but do not remove it.
3. Loosen the pivot bolt, but do not remove it.

1. Loosen the belt adjusting bolt.
2. Remove the alternator drive belt.
3. Remove the bracket.
4. Remove the lower mounting bolt and pivot bolt.
5. Remove the alternator.
6. Disconnect the alternator field circuit plug.
7. Remove the B+ terminal nut and wire.

To install:

1. Attach the alternator and bracket to the engine, then tighten the mounting bolts to 40 ft. lbs. (54 Nm).
2. Install the drive belt onto the alternator pulley. Make certain that the belt is seated correctly on the pulley.
3. Install and tighten the B+ terminal nut and wire to 75 inch lbs. (9 Nm) onto the new alternator.
4. Connect the alternator field circuit plug.
5. Connect the negative battery cable.

Hope helped with this (remember rated this help) Good luck.

Don't know your engine size so pick the appropriate one:

MPV Models 2.6L ENGINE
Fig. 2: Alternator installation — 2.6L engine

1. Disconnect the negative battery cable.
2. Tag and disconnect the wire and connector from the alternator.
3. Remove the drive belt.
4. Remove the support mounting bolt and nut.
5. Remove the alternator assembly. To install:
   
6. Position the alternator assembly against the engine and install the support bolt.
7. Install the adjusting strap mounting bolt.
8. Install and adjust the alternator belt.
9. Tighten the support mounting bolt to 28–38 ft. lbs. (38–51 Nm), and the adjusting bolt to 14–18 ft. lbs. (19–25 Nm).
10. Connect all alternator terminals.
11. Connect the negative battery cable.

More than likely the mount is bad and you will have to buy the bolt from the dealer or a fabricating shop that sells metric bolts, or go to a junk yard to get a replacement for same car. pull the nut off the other side and measure from the top of the bolt to the end of the threads then go buy one at the store using the nut as your size guide and thread pitch and get a grade 8 bolt to replace it with.

buy one like the 2 you have!