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The sound of a new alternator?
Posted: 12 Jul 2009, 18:35
by SeanW
Hello,
I've had a new alternator & belt fitted to my 1989 1.7TD several days ago. When I run the engine is makes a different sound to before, so I was wondering whether it is simply the sound of a new alternator spinning. The sound is like a mild thumping.
I've checked to make sure the coolant pump is turning and it all appears to be running fine.
Should I be worried?
Re: The sound of a new alternator?
Posted: 12 Jul 2009, 18:44
by Red Westie
Sometimes you will get a whurring or whistling noise as the new belt and or bushes bed in but never a thumping noise.
The only thing I can think of that would cause this is the belt catching on something 'flapping'.
Martin
Re: The sound of a new alternator?
Posted: 12 Jul 2009, 22:30
by bigherb
You need to check the alternator output it could be a faulty rectifier pack in the alternator.
Re: The sound of a new alternator?
Posted: 12 Jul 2009, 23:02
by Grumpy Midget
SeanW wrote:Hello,
I've had a new alternator & belt fitted to my 1989 1.7TD several days ago. When I run the engine is makes a different sound to before, so I was wondering whether it is simply the sound of a new alternator spinning. The sound is like a mild thumping.
I've checked to make sure the coolant pump is turning and it all appears to be running fine.
Should I be worried?
Think I would be worried (Yes) Have you checked that the belt runs inline with all the pulleys, Could be this which is giving the thumping sound. as the belt would be twanging. If you didnt fit it then take it back to who ever did fit it.
(I've had a new alternator & belt fitted to my 1989 1.7TD several days ago.)
Never heard of a 1.7TD????? Do you mean a 1.7 KY.- NA
To my knoledge, and I may be wrong but thought VW only fitted 1.6D.CS.N/A & 1.6TD. 1.7KY. N/A in the T25
Re: The sound of a new alternator?
Posted: 30 Jul 2009, 11:47
by SeanW
All been checked out and apparently it's running fine.
Grumpy Midget wrote:
Think I would be worried (Yes) Have you checked that the belt runs inline with all the pulleys, Could be this which is giving the thumping sound. as the belt would be twanging. If you didnt fit it then take it back to who ever did fit it.
(I've had a new alternator & belt fitted to my 1989 1.7TD several days ago.)
Never heard of a 1.7TD????? Do you mean a 1.7 KY.- NA
To my knoledge, and I may be wrong but thought VW only fitted 1.6D.CS.N/A & 1.6TD. 1.7KY. N/A in the T25
Definitely is a 1.7TD (you can see the manual here -
http://www.justkampers.com/shop/type_25 ... 10839.html.
What's a 1.7 KY. N/A?