Alternator

Submitted: Wednesday, Nov 12, 2003 at 20:49
ThreadID: 8482 Views:2381 Replies:3 FollowUps:1
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Howdy
I have to replace the alternator in my 91 Terrano. Damn things draining the battery and I think the bearings gone. Anyway it turns out its the same alternator as fitted to a 91 Navara and the TD42 patrol. Does anyone have an idea about what is a good price for a second hand one or what i should pay for a new one.
I believe its a common fault for the alternator to fail on the patrol, therefore on the Navara and Terrano also. Given this, what are my chances of getting a half decent one from a wrecker? Or should I buy new? I have found a secondhand one in Lismore ( wherever that is ) for $330. Anyone have a spare one lying around?
Also there are two pipes connected to the back of it which I have been told contain engine oil. Is this correct and will they cause much drama when I go to replace it.
I mean will I have to drain the oil or just plug the pipes while I swap them over?
Thanks for your help
Jim

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Reply By: Russell [Pajero] - Wednesday, Nov 12, 2003 at 21:15

Wednesday, Nov 12, 2003 at 21:15
Cost me near on $600 for a reconditioned alternator for my 1990 Terrano, was told the TD27T ALTERNATOR was not normal Pathfinder type (with vacuum pump) as part of assembly I think.

RTA

Russell
AnswerID: 37074

Reply By: hoyks - Wednesday, Nov 12, 2003 at 21:24

Wednesday, Nov 12, 2003 at 21:24
I would get the alternator serviced and then re-installed. I’m sure that this would be less than $300 and you would know you are ending up with a unit that is good as new. Any good auto elec should be able to do the job.

There is a vacuum pump on the back of the alternator, which assists the brakes, this is why a replacement is so expensive.

If there is nothing wrong with the vacuum pump you don’t have to replace it, just unbolt it and have the alternator serviced and re install it. And yes, it does contain oil. About 5ml according to the Terrano II manual.
AnswerID: 37076

Follow Up By: hoyks - Wednesday, Nov 12, 2003 at 21:35

Wednesday, Nov 12, 2003 at 21:35
I just had a look at the manual and the vacuum pump is just attached by 3 bolts for the Hitachi model or 1 bolt into the end of the shaft on the Bosch alternator (assuming a '91 is similar). So you might be able to remove the alternator without disconnecting the pump from the brake system.
0
FollowupID: 26796

Reply By: mik*2 - Wednesday, Nov 12, 2003 at 22:46

Wednesday, Nov 12, 2003 at 22:46
I replaced the alt in the terrano I had. It cost me $280 to overhaul it at the local autoelec...The vac pumps off a patrol are the same. The only variable is the width of the pump itself. Make sure, if you buy one from a wrecker, that the splined shaft that drives the vac pump isn't worn, (internal and external)mine was and it makes an annoying noise and in the end costs bucketloads of money to replace it. From memory around $500 for the pump alone from nissan

cheers
mike
AnswerID: 37089

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