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-   -   Alternator Pulley sheared off!?! (http://986forum.com/forums/boxster-general-discussions/70631-alternator-pulley-sheared-off.html)

jpdal 01-08-2018 12:47 PM

Alternator Pulley sheared off!?!
 
Was driving my '00 boxster today when i lost my power steering and both the ABS and battery light came on. luckily i was close to home. Did some quick research, it seemed like it was just a serpentine belt that needed to be replaced.

Open up the back compartment to put a new belt in and saw that the belt slipped off and it seemed like it was in good condition. I inspected the pulleys and saw that my alternator pulley had sheared off!? A part of the pulley is still connected to the shaft it seems.

Here are some pictures:

https://imgur.com/gallery/3EqtE


Is this normal? I've looked throughout the forums and haven't seem a similar occurrence happen? Should i replace the alternator as well?

Thanks in advance!:cheers:

Geof3 01-09-2018 08:04 PM

Um, no. That is not normal. But, from the looks of it, that thing was rusted badly. I can't believe it wasn't making some crazy howling noises. All the red stuff is rust. That pully was seized. The $100,000,000 question is why was it so rusty in the first place? That requires moisture, which there shouldn't be much of in that part of the engine compartment. If I were you, replace the alt and EVERY other rotating thing on the engine, to include the water pump, idler pullies, even possibly the power steering pump. It is possible every one of these items has rust, which is bad. At the very least, closely inspect all of these for ANY sign of rust and replace as necessary.

JFP in PA 01-10-2018 02:36 AM

Quote:

Originally Posted by jpdal (Post 559754)
Was driving my '00 boxster today when i lost my power steering and both the ABS and battery light came on. luckily i was close to home. Did some quick research, it seemed like it was just a serpentine belt that needed to be replaced.

Open up the back compartment to put a new belt in and saw that the belt slipped off and it seemed like it was in good condition. I inspected the pulleys and saw that my alternator pulley had sheared off!? A part of the pulley is still connected to the shaft it seems.

Here are some pictures:

https://imgur.com/gallery/3EqtE


Is this normal? I've looked throughout the forums and haven't seem a similar occurrence happen? Should i replace the alternator as well?

Thanks in advance!:cheers:

That pulley is completely normal. It is a declutching style pulley, the only thing missing is the snap on plastic from cover, which is decorative:
http://986forum.com/forums/uploads01...1342316421.jpg http://www.oldbenz.co/content/images...00860_550.jpeg

If the alternator is not making ratcheting sounds, put a new belt on it and you are done.

Quadcammer 01-10-2018 05:27 AM

Quote:

Originally Posted by Geof3 (Post 559859)
Um, no. That is not normal. But, from the looks of it, that thing was rusted badly. I can't believe it wasn't making some crazy howling noises. All the red stuff is rust. That pully was seized. The $100,000,000 question is why was it so rusty in the first place? That requires moisture, which there shouldn't be much of in that part of the engine compartment. If I were you, replace the alt and EVERY other rotating thing on the engine, to include the water pump, idler pullies, even possibly the power steering pump. It is possible every one of these items has rust, which is bad. At the very least, closely inspect all of these for ANY sign of rust and replace as necessary.

You seemingly have no clue what you're talking about

Quote:

Originally Posted by JFP in PA (Post 559873)
That pulley is completely normal. It is a declutching style pulley, the only thing missing is the snap on plastic from cover, which is decorative:
http://986forum.com/forums/uploads01...1342316421.jpg http://www.oldbenz.co/content/images...00860_550.jpeg

If the alternator is not making ratcheting sounds, put a new belt on it and you are done.

Scroll down to the next pic.

78F350 01-10-2018 06:20 AM

Quote:

Originally Posted by Quadcammer (Post 559875)
...Scroll down to the next pic.

The next pic:

http://986forum.com/forums/uploads02...1515593996.jpg

kk2002s 01-10-2018 06:35 AM

Seems the alternator clutch pulley seized
It looks like you can buy just the alternator clutch pulley for around $40
That does seem odd that much rust is up there. Maybe the water pump is leaking onto the belt?
Don't think you need to immediately jump to replacing all spinning things BUT you should spin and listen to see if any others are coming to their end of life

You may want to replace the belt as well

Brian in Tucson 01-10-2018 07:38 AM

If the alt. clutch had seized, wouldn't the alternator still turn? Does the alternator turn easily and smoothly?

I don't think I'd buy a new alt. clutch before I answered these questions. More likely I'd look for a reman'd alternator. And check out the operation of all the other rotating thingies on the front of the engine.

jpdal 01-10-2018 08:36 AM

Quote:

Originally Posted by Geof3 (Post 559859)
Um, no. That is not normal. But, from the looks of it, that thing was rusted badly. I can't believe it wasn't making some crazy howling noises. All the red stuff is rust. That pully was seized. The $100,000,000 question is why was it so rusty in the first place? That requires moisture, which there shouldn't be much of in that part of the engine compartment. If I were you, replace the alt and EVERY other rotating thing on the engine, to include the water pump, idler pullies, even possibly the power steering pump. It is possible every one of these items has rust, which is bad. At the very least, closely inspect all of these for ANY sign of rust and replace as necessary.

Yikes, that's not what i was hoping to hear. I did inspect the other pulleys and components back there - didn't see any rust and they all do spin freely. Maybe the pulley somehow got rusted and when it seized the rust blew onto the alternator????

The alternator does spin easily and freely. I ordered a new alternator pulley and alternator tool (CTA Tools 8088 Bosch Alternator Wrench). Hopefully that's all that's needed.

Thank you guys for the help! really appreciate it!

Racer Boy 01-10-2018 08:51 AM

Quote:

Originally Posted by jpdal (Post 559899)
Yikes, that's not what i was hoping to hear. I did inspect the other pulleys and components back there - didn't see any rust and they all do spin freely. Maybe the pulley somehow got rusted and when it seized the rust blew onto the alternator????

The alternator does spin easily and freely. I ordered a new alternator pulley and alternator tool (CTA Tools 8088 Bosch Alternator Wrench). Hopefully that's all that's needed.

Thank you guys for the help! really appreciate it!

Don't pay much attention to Geof3's post, there isn't much good information in it.

From your picture, it doesn't look like rust, it looks like a red dust, which would make me suspicious of a bearing starting to fail. It could be the pulley bearing, or a bearing in the alternator itself. If it were me, I'd play it safe and just replace the entire alternator.

robdelorenzo 01-10-2018 09:05 AM

I had the same thing happen a while ago, except the pulley shaft sheared off.
Car overheated and fortunately did not cook anything other than the hose coming from the oil cooler. Mechanic replaced it and all is well. It's a potential engine killer though if I wasn't paying attention.

thstone 01-10-2018 09:47 PM

Quote:

Originally Posted by jpdal (Post 559754)
Is this normal? I've looked throughout the forums and haven't seem a similar occurrence happen?

Its not normal. Normally, the belt fails or the alternator bearing fails or the voltage regulator fails.


Quote:

Originally Posted by jpdal (Post 559754)
Should i replace the alternator as well?

If it were me, I'd replace the entire alternator. Mostly because I value reliability over cost. You don't say how many miles the car has, but I'll guess that it has enough miles that I wouldn't want to take the chance that the bearing or voltage regulator will fail in a short time and then you'd have to do a second repair on the same component. Since labor is typically 40%-60% of a repair cost, saving money on the parts replaced sometimes isn't the cheapest route. And even if you DIY it, no one wants to replace an alternator in a Boxster more than once.

Geof3 01-10-2018 09:48 PM

Quote:

Originally Posted by Quadcammer (Post 559875)
You seemingly have no clue what you're talking about



Scroll down to the next pic.

You guys obviously didn't see the pic where the pully was sheared clean off the spool? I am fully aware the pully is a clutch type.

And where would "red dust" come from? Other than a rusted/worn bearing/surface? That pully is NOT normal. Sorry.

As mentioned, the pully is replaceable with a special tool. If there are no further signs of corrosion or otherwise, it should be fine. (though thstone's advice is spot on)

Geof3 01-10-2018 10:38 PM

Quote:

Originally Posted by thstone (Post 559953)
Its not normal. Normally, the belt fails or the alternator bearing fails or the voltage regulator fails.




If it were me, I'd replace the entire alternator. Mostly because I value reliability over cost. You don't say how many miles the car has, but I'll guess that it has enough miles that I wouldn't want to take the chance that the bearing or voltage regulator will fail in a short time and then you'd have to do a second repair on the same component. Since labor is typically 40%-60% of a repair cost, saving money on the parts replaced sometimes isn't the cheapest route. And even if you DIY it, no one wants to replace an alternator in a Boxster more than once.

NO DOUBT about that! That bolt/bushing can be a major BIOTCH!

JFP in PA 01-11-2018 02:33 AM

Quote:

Originally Posted by Geof3 (Post 559954)
You guys obviously didn't see the pic where the pully was sheared clean off the spool? I am fully aware the pully is a clutch type.

And where would "red dust" come from? Other than a rusted/worn bearing/surface? That pully is NOT normal. Sorry.

As mentioned, the pully is replaceable with a special tool. If there are no further signs of corrosion or otherwise, it should be fine. (though thstone's advice is spot on)

Sorry, but we see about 20 or so that look like this every week and they are both serviceable and completely normal (OP's original photo):

https://i.imgur.com/3854uCC.jpg

They all throw some red dust, which is probably why Porsche put the plastic cover on them in the first place.......

Geof3 01-11-2018 03:25 PM

JFP, have you still not seen the picture with the pulley sitting in his hand? The pulley sheared off the spindle. The race is actually broken. You are only looking at the first picture...

JFP in PA 01-11-2018 06:21 PM

Quote:

Originally Posted by Geof3 (Post 559994)
JFP, have you still not seen the picture with the pulley sitting in his hand? The pulley sheared off the spindle. The race is actually broken. You are only looking at the first picture...

I was under the impression that the one being held in a hand is not by the original poster, it is from someone else, but if that is the OP's pulley, then it has failed.

That doesn't change the question about the pulley's emitting some rust, they all do that to varying degrees.

The Radium King 01-11-2018 06:30 PM

hey - fooled me too initially, but if you follow the link to the OPs imagur account and scroll up on the pic that appears you will get a bunch more pics, including those posted by others later in the thread. the OPs pulley did in fact come right off.

78F350 01-11-2018 06:37 PM

Quote:

Originally Posted by JFP in PA (Post 560005)
I was under the impression that the one being held in a hand is not by the original poster, it is from someone else, but if that is the OP's pulley, then it has failed..

I reposted a screen shot of the subsequent images so I wouldn't make the thread unreadable with a SUPER SIZED IMAGE.

Thanks for all you do, but in this case, I think you missed it originally.

thstone 01-11-2018 09:37 PM

Quote:

Originally Posted by Geof3 (Post 559956)
NO DOUBT about that! That bolt/bushing can be a major BIOTCH!

Yes, those who have done this job, know exactly what I was talking about! :cheers:

jb92563 01-12-2018 12:46 PM

What is the purpose of the alternator having a clutch?

Does it engage under computer control or is it static?


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