jimconline Posted July 14, 2022 Share Posted July 14, 2022 Any thoughts about the source from where this noise is coming? As you will hear in the video is does stop periodically. I did replace the water pump about 6,000 km ago and all has been quiet up until recently. IMG_0841.mp4 Quote Link to comment Share on other sites More sharing options...
steve b Posted July 14, 2022 Share Posted July 14, 2022 It's the back of the drive belt and the tensioner arguing - check the tensioner bearing and the belt for age cracking in the polyvee's Steve Quote Link to comment Share on other sites More sharing options...
jimconline Posted July 14, 2022 Author Share Posted July 14, 2022 Thanks, Steve. Will have a look. Quote Link to comment Share on other sites More sharing options...
Maverik Posted July 15, 2022 Share Posted July 15, 2022 This could be the bearings in the tensioner pulley. There was a common fix for a chirping fan belt which was to put a penny in behind the tensioner itself. - but if this noise had just started I'd be looking for worn belt and duff tensioner bearings - I've also seen the water pump pulley have some small damage which caused this issue also. 1 Quote Link to comment Share on other sites More sharing options...
jimconline Posted July 20, 2022 Author Share Posted July 20, 2022 After focusing in on the tensioner pulley I don't think this is where the noise is originating. My hunch is the problem lies with the alternator. Since the alternator is rather dated I have ordered a replacement (rather than try to replace the pulley). It will take a week or two to get as receiving parts in Canada can be a bit of a wait. We shall see. In the meantime, the Defender keeps happily driving along with a new instrument added to its orchestra. Quote Link to comment Share on other sites More sharing options...
steve b Posted July 20, 2022 Share Posted July 20, 2022 Do let us know the outcome , all good data Steve Quote Link to comment Share on other sites More sharing options...
Snagger Posted July 20, 2022 Share Posted July 20, 2022 I have had similar noises from the tensioner and from the water pump. Quote Link to comment Share on other sites More sharing options...
jimconline Posted August 8, 2022 Author Share Posted August 8, 2022 The new alternator arrived and I have removed the old one and installed the new except for the wiring. I believe I understand where to connect the two wires from the bundle that heads to the battery. I would appreciate some insight into a third connector (circled in attached photo) that was on the old alternator but not the new. Should I take it off the old one and put it on the new? I also ordered a tensioner, Snagger, in case my theory about the alternator is wrong. The water pump is fairly new so I'm hoping it's not that. Quote Link to comment Share on other sites More sharing options...
Maverik Posted August 9, 2022 Share Posted August 9, 2022 The black thing circled is just an electrical Interference suppressor - i.e. it helps keep some of the EMF from the alternator effecting the radio - background crackling etc. you dont need to take it across to the new one. Quote Link to comment Share on other sites More sharing options...
western Posted August 9, 2022 Share Posted August 9, 2022 Thick browns go to stater & battery, you can ignore the brown/red on my alternator Brown/yellow to charge warning light in dash Ignore the purple/yellow that's drives my rev counter. Thick cable in ridged sleeve is a jumper from alt to starter to supplement the original wires. Quote Link to comment Share on other sites More sharing options...
jimconline Posted August 11, 2022 Author Share Posted August 11, 2022 Attached the wires, reconnected the batteries, fired her up, and all was Defender quiet. After connecting the batteries, I had tested them and the voltage was 12+. Once running I checked the voltage again and it was 14+. All seemed just fine. And then after a few minutes of running, in true Defender fashion of not wishing to admit total compliance in the maintenance you do, I hear a faint intermittent chirp—not the same noise as the alternator and indeed hardly audible, coming from the same area. I smiled. After twenty years of serving me well we've both agreed on give and take. Will see if it develops into anything. I do wish to thank this forum for all your help; most appreciated. 2 Quote Link to comment Share on other sites More sharing options...
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