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Alternator replacement

Tiny
HENRY5120
  • MEMBER
  • 2003 MAZDA PROTEGE
I removed bolt holding alternator, what the best / easiest way to remove it? Plus I need the belt diagrams.
Friday, July 30th, 2010 AT 7:18 PM

13 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
There's no easiest way but the right way-see below:

Service and Repair

GENERATOR REMOVAL/INSTALLATION

WARNING: When the battery cables are connected, touching the vehicle body with generator terminal B will generate sparks. This can cause personal Injury, fire, and damage to the electrical components. Always disconnect the battery before performing the following operation.

1.Disconnect the negative battery cable.


https://www.2carpros.com/forum/automotive_pictures/12900_a_4.jpg



2.Remove in the order indicated in the table.
3.Install in the reverse order of removal.

Drive Belt Installation Note
*Install the drive belt and adjust the drive belt deflection or tension.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Friday, July 30th, 2010 AT 9:34 PM
Tiny
PAH
  • MEMBER
  • 1 POST
  • 2002 MAZDA PROTEGE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 125,000 MILES
I have removed the belts, disconnected the electrical leads and removed the upper and lower bolts. The old aleternator is free of its mount but I cannot get it out of the engine compartment from the top or bottom. I tried loosening the AC hoses and gently moving them out of the way but still cannot squeeze it out. Do I have to remove the exhaust pipe?
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Can either remove bolts for engine-to-manifold support bracket and remove that bracket, then remove the 4 steering gear mounting bolts so you can move steering gear out of the way, OR pull the CV axle to gain access.
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
NHAND249139
  • MEMBER
  • 1 POST
  • 2002 MAZDA PROTEGE
  • 4 CYL
  • FWD
  • MANUAL
  • 173,000 MILES
What are the steps I would need to take to remove and replace my alternator?
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Easiest way to access alternator for replacement is by pulling CV axle, then just disconnect electrical connections, drive belt and alternator mounting bolts.
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
NATIONALSSCOTT
  • MEMBER
  • 1 POST
  • 2000 MAZDA PROTEGE
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
Was having a screeching noise coming from the alternator when I would rev the engine up and would be worse when I had the lights/defroster/heater on. I have replaced the alternator and belts. I was running fine and then it started to screach again like before. What might be the cause?

Thank you
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi nationalsscott,

Thank you for the donation.

Recheck the belt tension. Ribbed belts are supposed to be readjusted after running in for a short period of breaking in. If the belt tension is not the cause, then you need to check the crank pulley.

The harmonic balancer which is a rubber damper around the crank pulley could be bad causing the outer pulley to slip around the inner pulley.
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
STOVALLC
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  • 1 POST
  • 2000 MAZDA PROTEGE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 11,500 MILES
Need to know the steps on how to replace an alternator
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
On the bottom of the engine near the passanger firewall there are two air conditioning lines blocking your way, unscrew the holder and move the lines out of the way (carefully) and you should be able to remove the alternatior without issue. Just loosen drive belt, then remove mounting bolts and alternator.
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
BRINGTWEETY
  • MEMBER
  • 1 POST
  • 1999 MAZDA PROTEGE
  • 109 MILES
I have replace the alternator now about 6 times in less then 3 months with also a new battery every time.
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,133 POSTS
Is the voltage regulator part of the alt? How many volts is it putting out?
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be the computer controlled of the alternator field generation circuit
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)
Tiny
ELDONGO
  • MEMBER
  • 1 POST
Offcourse a chip ! I look at the voltage level for both of this alternator wires, blu/whi and gr/whi in a good operating system and it showed.650mv while the alt output was at 14.0v in my car I read 2.4v in the gr/whi and 0.00 out in my whi/blue.
I will check the wiring to the module in the gr and to the instrument cluster charge warning lite for the whi/blue otherwise I will replace the controler board
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Wednesday, April 8th, 2020 AT 5:54 PM (Merged)

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