britlude
06-05-2014, 06:45 PM
A couple of times my car has decided it didn’t want to turn over on the key, repeated key turns or a jump pack sorted it in the short term, but investigation was needed! When the car decided it didn’t want to play ball after the car had been on charge, I knew something had to be done.
I knew the ignition switch was ok (that had been stripped/cleaned previously), so I decided to have a look at the starter motor itself!
Air filter box removed and a bit of double jointed spannering had the starter motor off the car.
Nippon Denso starters basic design is a solenoid which throws out the pinion gear to engage on the flywheel, then when the solenoid is virtually at full travel, and the gears meshed, a pair of contacts are shorted with a copper ring and this sends the power to the motor. Unfortunately for us, this switching of heavy currents means the contacts can be spark eroded, but fortunately for us, Nippon Denso made the solenoid switch part easily replaceable!
Unfortunately there are many types of starter motor, so I checked the contacts and looked for numbers!
Starter motor….
http://i301.photobucket.com/albums/nn41/thisYup/nsx%20stuff/nsx%20starter%20motor/2014-05-06-4795Small.jpg (http://s301.photobucket.com/user/thisYup/media/nsx%20stuff/nsx%20starter%20motor/2014-05-06-4795Small.jpg.html)
And the label on the motor…
http://i301.photobucket.com/albums/nn41/thisYup/nsx%20stuff/nsx%20starter%20motor/2014-04-28-4704Small.jpg (http://s301.photobucket.com/user/thisYup/media/nsx%20stuff/nsx%20starter%20motor/2014-04-28-4704Small.jpg.html)
Pretty tough to see, but with this, Prime, and the joys of the interweb, I got to 128000-7770!
The terminal one side was pretty eroded, you can see here the tip of one is about half the thickness it should be! It had a nice step, ideal for catching the edge of the contact washer, so as an interim measure it was blended in, and the contact surface cleaned up!
http://i301.photobucket.com/albums/nn41/thisYup/nsx%20stuff/nsx%20starter%20motor/2014-05-06-4803Small.jpg (http://s301.photobucket.com/user/thisYup/media/nsx%20stuff/nsx%20starter%20motor/2014-05-06-4803Small.jpg.html)
(…the bottom one!)
I knew the ignition switch was ok (that had been stripped/cleaned previously), so I decided to have a look at the starter motor itself!
Air filter box removed and a bit of double jointed spannering had the starter motor off the car.
Nippon Denso starters basic design is a solenoid which throws out the pinion gear to engage on the flywheel, then when the solenoid is virtually at full travel, and the gears meshed, a pair of contacts are shorted with a copper ring and this sends the power to the motor. Unfortunately for us, this switching of heavy currents means the contacts can be spark eroded, but fortunately for us, Nippon Denso made the solenoid switch part easily replaceable!
Unfortunately there are many types of starter motor, so I checked the contacts and looked for numbers!
Starter motor….
http://i301.photobucket.com/albums/nn41/thisYup/nsx%20stuff/nsx%20starter%20motor/2014-05-06-4795Small.jpg (http://s301.photobucket.com/user/thisYup/media/nsx%20stuff/nsx%20starter%20motor/2014-05-06-4795Small.jpg.html)
And the label on the motor…
http://i301.photobucket.com/albums/nn41/thisYup/nsx%20stuff/nsx%20starter%20motor/2014-04-28-4704Small.jpg (http://s301.photobucket.com/user/thisYup/media/nsx%20stuff/nsx%20starter%20motor/2014-04-28-4704Small.jpg.html)
Pretty tough to see, but with this, Prime, and the joys of the interweb, I got to 128000-7770!
The terminal one side was pretty eroded, you can see here the tip of one is about half the thickness it should be! It had a nice step, ideal for catching the edge of the contact washer, so as an interim measure it was blended in, and the contact surface cleaned up!
http://i301.photobucket.com/albums/nn41/thisYup/nsx%20stuff/nsx%20starter%20motor/2014-05-06-4803Small.jpg (http://s301.photobucket.com/user/thisYup/media/nsx%20stuff/nsx%20starter%20motor/2014-05-06-4803Small.jpg.html)
(…the bottom one!)