Chris and Kate Posted May 13, 2023 Share Posted May 13, 2023 Can anyone help with this?It sounds like an insect buzzing and is very irritating.I have taken the bonnet off and looked under the dash and though it is very hard to tell because nearly everything is black I can't see anything obviously loose.A search of posts and Google reveals some comments about the heater and the wiper mechanism as possibly culprits though I get the impression they are slightly lower frequency than our anoying buzzing vibration. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 13, 2023 Member Share Posted May 13, 2023 Could it be an indicator buzzer? When does it happen... does the ignition need to be ON and does it then do it all of the time?Jonathan Link to comment Share on other sites More sharing options...
Andy135 Posted May 13, 2023 Share Posted May 13, 2023 Does it happen at a particular RPM? The wiper buzz seems to occur at around 2500rpm. Ask me how I know this.... Link to comment Share on other sites More sharing options...
theslowman Posted May 14, 2023 Share Posted May 14, 2023 Have you found an elegant way to stop the irritating buzz from the wiper mechanism ? Link to comment Share on other sites More sharing options...
Wrightpayne Posted May 14, 2023 Share Posted May 14, 2023 Doesnt say whether the noise occurs constantly while driving (or at a certain engine revs maybe) or when an electrical item is switched on.On mine I get a buzz from the dash at certain revs. If I press the ally between the speedo and rev counter it stops. New dial rubbers are on the to-do list along with looking at attaching rubber trim on the ends of the metal clamping brackets for all the dials. Link to comment Share on other sites More sharing options...
Andy135 Posted May 14, 2023 Share Posted May 14, 2023 #4, sadly not. It's on my list of things to do, but as it will involve contortions to get under the dash I've been putting it off. Link to comment Share on other sites More sharing options...
Chris and Kate Posted May 15, 2023 Author Share Posted May 15, 2023 It is a mechanical vibration.Over the weekend I tried to isolate it and It reduces a lot if I reach under the dash and put a thumb on the wiper linkage.So It is either that or something close to / attached to it. Link to comment Share on other sites More sharing options...
Chris and Kate Posted May 15, 2023 Author Share Posted May 15, 2023 I think it is either the wiper mechanism or something close to it or attached to it. The weekends investigations show that thumb pressure on the linkage reduces it a lot.It is noticeable at just under 2000rpm to about 2500rpm. Unfortunately an 30mph limit puts the engine right on the maximum resonance. Link to comment Share on other sites More sharing options...
Chris and Kate Posted May 15, 2023 Author Share Posted May 15, 2023 I read another post where the owner filled the mechanism tube up with grease.I have wondered about a spring or weight to preload the tube just enough to stop it vibrating. Link to comment Share on other sites More sharing options...
Chris and Kate Posted May 15, 2023 Author Share Posted May 15, 2023 It is worst at about 2000rpm and drops of at higher revs up to about 2500rpm.It sounds like a mechanical vibration and I suspect the wiper mechanism as light thumb pressure on the tube reduces it a lot.I suspect it is either the spring-drive in the tube or something close to / attached to the wiper mechanism. Link to comment Share on other sites More sharing options...
Drakman Posted May 17, 2023 Share Posted May 17, 2023 Hi, Check the 2 screws that hold the two center lift the dot poppers on the top of the dash, they seem to work their way loose and make a buzzing sound. Link to comment Share on other sites More sharing options...
Area Representative jonsymons Posted May 17, 2023 Area Representative Share Posted May 17, 2023 I had an annoying buzz too - turned out to the surrounds to the speedo had worked a bit loose. Tightened up and all ok. Link to comment Share on other sites More sharing options...
Chris and Kate Posted May 21, 2023 Author Share Posted May 21, 2023 We found a fix that eliminates the most annoying noise.Wait for it!A 2lb weight wrapped up in an old dishcloth and tied around the tube of the wiper mechanism.Most of the rattling has gone.I might try packing it with grease at some time. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 23, 2023 Member Share Posted May 23, 2023 Now that you've localised it... can you solve it with lower mass by pulling the tube towards a convenient fixed point or two?Jonathan Link to comment Share on other sites More sharing options...
SM25T Posted May 23, 2023 Share Posted May 23, 2023 #13 ..... that must qualify for one of the strangest things found in a 7 !? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted May 23, 2023 Member Share Posted May 23, 2023 "#13 ..... that must qualify for one of the strangest things found in a 7 !?"Mine has a piece of mahogany staircase handrail bolted to the throttle pedal...Jonathan Link to comment Share on other sites More sharing options...
Terry Field Posted May 25, 2023 Share Posted May 25, 2023 I have the same buzzing problem. It stops if I press the dash between the dials, and sometimes when I just press the dial glass itself, so I am thinking new ring seals might be required Link to comment Share on other sites More sharing options...
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