Rock_Rat
Senior Member
Replace Alternator at 333K Miles
Replace Alternator
I had started to notice my alternator was not working to its fullest potential. This past week I was beginning to notice my output was steadily dropping below 12.5 even into the 11's. I performed the obvious troubleshooting steps first beginning with ensuring I still had a belt. I checked my wiring and my 120amp fuse. All looked fine. I then checked my voltage and amps at the alternator at around 2000rpm. Amps were way below the 30amp threshold.
Denso or After Market?
With 333K miles on the original alternator it was a no brainer for me - DENSO!
I ordered it from Camelback early in the week for $229 plus $30 for core. Ordering from Camelback gave me the reassurance that the alternator was re-manufactured by Toyota. I probably still had a little mileage left on the old one but not much I'm sure.
Removal
HINTS and Tips
Replace Alternator
I had started to notice my alternator was not working to its fullest potential. This past week I was beginning to notice my output was steadily dropping below 12.5 even into the 11's. I performed the obvious troubleshooting steps first beginning with ensuring I still had a belt. I checked my wiring and my 120amp fuse. All looked fine. I then checked my voltage and amps at the alternator at around 2000rpm. Amps were way below the 30amp threshold.
Denso or After Market?
With 333K miles on the original alternator it was a no brainer for me - DENSO!
I ordered it from Camelback early in the week for $229 plus $30 for core. Ordering from Camelback gave me the reassurance that the alternator was re-manufactured by Toyota. I probably still had a little mileage left on the old one but not much I'm sure.
- Alternator - Denso - PN#270606216084
- Cost - $229 plus $30 for core return
- Time - About one hour
- Tools - basic metric sockets, 3/8 drive ratchet and one 3" extension
Removal
- Disconnect negative battery terminal.
- Remove nut and washer from external terminal and the wire.
I purposely skip this next step here as in the FSM or Haynes - they have you disconnect the connector but it's a PITA from the side because of a lack of good leverage. See my hints and tips below. - Loosen the alternator locknut, pivot bolt, nut and adjusting bolt.
- Push the alternator towards the engine and remove the alternator belt.
- Remove the alternator lock nut, bolt and pivot bolt.
- Gently slide the alternator out and turn on it's side with the connector facing you.
- Disconnect the wiring connector by pressing in on the grey tab.
HINTS and Tips
- Do NOT remove the battery. It's not necessary.
- Do not attempt to disconnect the connector until AFTER you remove all the hardware and lay it on it's side. It's much easier.
- With a DENSO you don't need dielectric grease it ships already installed.
- The easiest access to install the lock bolt and nut is from under the vehicle through the wheel well. If you have pretty good dexterity you can install everything from the top.
- I had to reset the sleeve bushing flush again so the alternator would slide in. I used a 15 mm socket, a bolt and nut. Pulled the bushing flush.
Started it up and ran it for a while and loved seeing it back into the 13.8 and higher range again.
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