Hi, can anyone point me in the right direction of where to get an alternator pulley? Mine has decided to boot off the cover and start leaking oil. 

Went to Skoda and they don't sell it on its own only with the alternator for £517. I have looked online and everyone I look at shows it's not a fit. 

Has anyone had to replace there's? Mines a 2ltr petrol 2017 

If someone has replaced there's already and know one that's fit that would be great.

The cover being the round plastic disc?

 

Its only a dust cover for the one way sprag clutch and there should be no oil present or even grease to leak, the rotor bearings are sealed and inside the alternator housing.

 

I would look carefully to see where the oil is coming from, if the auxiliary drive belt gets contaminated it can shred and rip apart the cam belt cover which in turn shreds the timing belt wrecking the engine.

 

Any oil leak in that area should not be ignored and I dont believe that yours is from the alternator pulley.

Have you tried turning the inside of the alternator to see it it rotates?

They would have a flat battery if it didn't!

As jr says your alternator cant leak oil ,it doesnt have any to leak ,you need to find where its coming from and go from there .

Thanks for your comments. 

It’s defo coming from the pulley. The pressure builds up which boots the plastic cover off. There’s oil/greasy substance literally splashed directly opposite this. Battery was replaced last year as it was old and turning the car on was getting sluggish. This is recent. No other leaks that can be seen  

Mebbe the bearings have thrown the grease out ,not sure if their on their way out and cant be relubed ,but someone will know i imagine .

If it doesn't turn then the clutch is seized, the alternator can still turn and operate with a broken clutch.

One way roller ramp bearing is foutu.

5 hours ago, Mickvrs220 said:

Mebbe the bearings have thrown the grease out ,not sure if their on their way out and cant be relubed ,but someone will know i imagine .

That’s what i think. My start stop is still functioning so the battery is still ok. Just want to replace this before I delve into the £517 for a new alternator. Just wondered if anyone has had to replace there’s previously and if so what did they use.

3 hours ago, Blue8793841 said:

If it doesn't turn then the clutch is seized, the alternator can still turn and operate with a broken clutch.

If the clutch is seized does it need the whole new alternator?

No, enfin yes if you go to the main stealer, the pulley assemblies alone are available on the aftermarket.

And they're a lot cheaper than £517. Get the belt changed as well.

So to give you guys an update . Have changed the pulley and it's been fine since. Have ran it for about 2 weeks now with no issue in regards to that. The pulley I used was this one;

https://www.autodoc.co.uk/ina/2386771

you will need the tools remove it though as well. Luckily we had them at work already.

Having the same issue as you @Madmax889 except I got the 12v battery warning on the dash on the way home, battery was only 10v when running. 

 

This is a pic of the pulley on mine:

 

https://imgur.com/a/YuhUUxP

It is not a big job to change the one way pulley, many videos in youtube. However it is easy only if you get the right tool to change it. I think there is two variants for the tool (different type inner bit, hex or torx if i remember correctly), depending on alternator manufacturer. Check ie. LLLparts or 7zap to find correct part number for your car and alternator manufacturer to get right tool. I recommend using pulleys made by INA.

 

Check ie. this video, bit older car but the principle is same (or was in 2015 2.0 tdi octavia). However, you dont need to rise the car to remove the belt, easy to do from above. Also you dont need to raise the engine.

https://youtu.be/il7CN53qQjg?si=iU7H9IYJTIhsUI0Y

 

Btw, while there and since the pulley has been faulty, changing the belt is recommended.

 

Edited 21 November, 20241 yr by RattleWagon

Thanks for that info, very helpful. 

 

Is it likely that the failed pulley is stopping the alternator from charging the battery? 

It is possible that the pulley fail so that it "spins empty" and does not rotate the alternator. You can check this by looking at the alternator when the engine is running, are the alternator internals rotating (the copperwire mess).

 

If the alternator rotates, then I dont believe that new pulley wud fix the charging problem. However, if the one way function of the pulley has failed, it might be the root cause for the alternator failure.

3 hours ago, amateurdad said:

Having the same issue as you @Madmax889 except I got the 12v battery warning on the dash on the way home, battery was only 10v when running. 

 

This is a pic of the pulley on mine:

 

https://imgur.com/a/YuhUUxP

Yeah. That was the same as mine. It’s blows of the black cap the only issue is the back of the pulley itself as some are recessed and some are flat. Mine was a flat one. To be fair it didn’t take too long to replace to be fair. I would recommend getting a pulley kit from Amazon I think my one was £25. Basically saving £400 not having to buy the whole alternator from Skoda. 

 

New freewheel clutch installed today. Easy enough and all running great again! 

 

Thanks for the information @Madmax889