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Author Topic: Engine rumble at low revs when pulling away  (Read 7170 times)

Offline pudding

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Re: Engine rumble at low revs when pulling away
« Reply #15 on: February 19, 2018, 12:52:02 pm »
Interesting. Hadn’t thought of replacing the alternator pulley. 

£83 from VW  :surprised:

Is the nut on there really tight? Easy to get off without an impact gun?

Pretty easy to get off without removing the alternator with the right tool, I bought mine from ebay similar to this one https://www.ebay.co.uk/itm/BLUE-PRINT-Mounting-Tool-Kit-alternator-freewheel-clutch-For-VW-ADG05506/311998802980?fits=Car+Make%3AVW&epid=1537658071&hash=item48a493ec24:g:hcwAAOSwzXxaA1DJ

Thanks mate, I bought the exact same Laser branded tool from Amazon.   Is it man enough for the job?  I've read the pulley is torqued to 85NM, which is fairly tight.   

So the procedure is to hold the shaft still (T50) whilst undoing the pulley with the 33 toothed spline part of the tool? 

I'm not even convinced my pulley is knackered tbh, but thought I'd give it a try as the rumbling noise on the clutch bite at idle has bugged me for years now!


2007 ED30 | 2009 TDI 140 | 2016 BMW 330D

Offline shaunK

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Re: Engine rumble at low revs when pulling away
« Reply #16 on: February 19, 2018, 01:48:47 pm »
Interesting. Hadn’t thought of replacing the alternator pulley. 

£83 from VW  :surprised:

Is the nut on there really tight? Easy to get off without an impact gun?

Pretty easy to get off without removing the alternator with the right tool, I bought mine from ebay similar to this one https://www.ebay.co.uk/itm/BLUE-PRINT-Mounting-Tool-Kit-alternator-freewheel-clutch-For-VW-ADG05506/311998802980?fits=Car+Make%3AVW&epid=1537658071&hash=item48a493ec24:g:hcwAAOSwzXxaA1DJ

Thanks mate, I bought the exact same Laser branded tool from Amazon.   Is it man enough for the job?  I've read the pulley is torqued to 85NM, which is fairly tight.   

So the procedure is to hold the shaft still (T50) whilst undoing the pulley with the 33 toothed spline part of the tool? 

I'm not even convinced my pulley is knackered tbh, but thought I'd give it a try as the rumbling noise on the clutch bite at idle has bugged me for years now!

Yep thats pretty much it, they're pretty simple to test if they're gone you just slacken the belt off carefully put a screwdriver in the alternator fan to stop it moving then see if the pulley freewheels.

this video explains it better than I can

Offline pudding

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Re: Engine rumble at low revs when pulling away
« Reply #17 on: February 19, 2018, 03:19:43 pm »
Cool, thanks, I'll try that first then.


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Offline Rigsby

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Re: Engine rumble at low revs when pulling away
« Reply #18 on: February 19, 2018, 04:45:27 pm »
Does the water pump run off the belt on ours?

Offline pudding

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Re: Engine rumble at low revs when pulling away
« Reply #19 on: February 20, 2018, 09:25:20 am »
The water pump runs off the cambelt.   The serpentine belt is just for the alternator and A/C pump.


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Offline Rigsby

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Re: Engine rumble at low revs when pulling away
« Reply #20 on: February 20, 2018, 10:17:38 am »
@Pudding ah that’s good , so I can whip the belt off and go for a short drive

Offline pudding

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Re: Engine rumble at low revs when pulling away
« Reply #21 on: February 20, 2018, 10:40:09 am »
Yep, very short.  The power steering motor pulls a LOT of juice!!


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Offline Ash_89

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Re: Engine rumble at low revs when pulling away
« Reply #22 on: February 20, 2018, 06:35:02 pm »
I didn’t get a chance to look at the alternator pulley guys weather was schocking
Mine doesn’t make a noise like a pulley usually would no sqweel etc just the revs bog down a lot when pulling away

Offline shaunK

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Re: Engine rumble at low revs when pulling away
« Reply #23 on: February 20, 2018, 08:24:57 pm »
I didn’t get a chance to look at the alternator pulley guys weather was schocking
Mine doesn’t make a noise like a pulley usually would no sqweel etc just the revs bog down a lot when pulling away

Same as mine was, I had no noise at all but was really rough pulling away.

Offline pudding

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Re: Engine rumble at low revs when pulling away
« Reply #24 on: February 21, 2018, 02:06:15 pm »
Took my belt serpentine off at lunch time and the existing pulley is absolutely fine.   So my rumbling is something else. 

Putting the belt back on again from above is fun isn't it!?!!  :confused:


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Offline Rigsby

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Re: Engine rumble at low revs when pulling away
« Reply #25 on: March 10, 2018, 07:44:20 pm »
Went to put a new pulley on today and mine is seized on, I put a screwdriver in the alternator and the pulley doesn’t turn either way, so I think ive found the problem.
Just need a new alternator now as the pulley is not coming off
« Last Edit: March 10, 2018, 08:15:12 pm by Rigsby »

Offline pudding

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Re: Engine rumble at low revs when pulling away
« Reply #26 on: March 15, 2018, 01:36:52 pm »
Bummer.  I didn't bother with the screwdriver.   Just turn the pulley to the right sharply then hold it.  You should feel the pulley stay still whilst the alternator continues to turn.   Some Auto Electricians diagnose the pulley by just yanking on the belt.   They're also the best for refurbed alternators.  Horrendous money from VW!




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Offline dreadaccind

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Engine rumble at low revs when pulling away
« Reply #27 on: April 04, 2018, 01:47:51 am »
Wow, thanks a TON for this diagram This will come in great handy when I redo my engine cover this spring

Offline pudding

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Re: Engine rumble at low revs when pulling away
« Reply #28 on: April 04, 2018, 01:31:58 pm »
 :grin:

Don’t forget to bikini your carrot under the sun  :happy2:


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Offline Ash_89

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Re: Engine rumble at low revs when pulling away
« Reply #29 on: July 05, 2018, 03:50:45 pm »
Sorry i didnt reply with a answer guys but im afraid i don't have one plus ive got rid of the gti 
still got the alternator pulley though its a mystery i didnt solve