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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old September 20th, 2014, 17:23   #1
Trev21
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Default alternator issues

Is an alternater from a 2001 turbo gas compatible with a 2001 turbo deisel?
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Old September 20th, 2014, 17:45   #2
Ol'Rattler
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Ah, no. The TDI alternator has an overrunning clutch pulley.

The problem with your alternator may well be the over running pulley which is replaceable for a lot less than the garbage alternators that AutoZone sells. The other problem that is common is a worn out brush/regulator assembly, also replaceable.

What are your symptoms? if you need to troubleshoot the overrunning clutch pulley, we can advise you.
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Old September 20th, 2014, 17:50   #3
Trev21
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The casing on my alternator broke and i need to repllace it. I have a guy who has one but his is a turbo gas
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Old September 20th, 2014, 17:57   #4
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It might work if you can swap the pulleys, although the power output for a a TDI is usually higher than the power output for a gasser.

Being that the gassers don't have an overrunning pulley, the gasser alternator with the gasser pulley will destroy your tensioner.
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Blue tint aspherical mirrors
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VCDS Hacks: DRL Disabled-Seatbelt Chime Disabled-Key fob Power Windows
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Old September 20th, 2014, 18:14   #5
Trev21
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Thanks so much for the help.
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Old September 20th, 2014, 18:15   #6
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2001 should be 120 amp?
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Old September 25th, 2014, 10:19   #7
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Yes. If your car was equipped with a/c, then it should have a 120 amp alternator.
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Old September 25th, 2014, 14:59   #8
Jettascuba
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You can have the casing repaired/welded. (Can't you swap casings? Just a thought, I don't know)
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Old September 25th, 2014, 15:33   #9
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I've been running a 90amp for over two years (three summers)! I got it in a trade. At the time, it was the quickest fix. Put it on and everything has worked fine. I plan to install the 120amp at the next TB change out ......... try at your own risk!
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