Alternator pulley missing

[Haulfron]

Can anyone help me with parts needed for this problem?

The re was a rubbing/rattling noise for about 5 mls (drove slowly) then a thump and silence.

Alternator light came on but I managed to get home.

Alternator pulley fell off with fittings. From photo can you tell if shaft is damaged and do I just need a new pulley, lock washer and bolt?

Edited September 13, 2011 by Haulfron

[logray]

:unsure:

I wouldn't risk just putting on a new pulley if you suspect the shaft is damaged. If you want to just put on a new pulley I would recommend taking it to an alternator rebuild shop or other automotive shop who can properly bench test the alternator to make sure it is working as it should. Assuming the shaft is not damaged and you can just bolt on a new one, the pulley and hardware would probably cost in the range of $75 USD ish.

The other option is a new or rebuilt alternator. You can get them in the states for about $300-400 USD depending on what type of transmission/year you have.

I suspect you'll also need a new serpentine belt.

And a bit of good luck that the engine didn't overheat while you drove the car for 5 miles without an accessory belt (driving the water pump).

[wvicary]

That looks like you have the one way or slip type pulley. The internal mechanism seizes and cause the pulley to separate, you need a special socket to hold the inner part of the pulley to unwind it from the alternator rotor shaft with yet another tool. Just replace the pulley and belt and you should be good to go. If you are removing the alternator for this repair I suggest you have the unit rebuilt.

[JFP in PA]

+1 That is the center hub of the clutch type pulley, which can and do fail as you described. You will need the special tool, a new pulley, and belt, and you will be back in business....

[Haulfron]

+1 That is the center hub of the clutch type pulley, which can and do fail as you described. You will need the special tool, a new pulley, and belt, and you will be back in business....

Thanks for the info. It helped me ask for the right parts, or I would have ended up with a pulley that did not fit. Local Porsche dealer is looking for used parts off an exchange, or will sell a replacement alternator with pulley for 1200 USD! Internet suppliers in UK only supply alternators without pulley, so I may have to purchase alternator and pulley and bolts, etc. seperately.

[JFP in PA]

Do an online search yourself, you can get a new one here, online, for about $60-70:

[Haulfron]

Thanks, I eventually located a new pulley and tool (more like 200USD, though)

It was a Bosch part - see pic.

[alstarz88]

a good part supplier for the uk is porsch apart they break lots of porsches and can also supply new parts at resonable prices