ccssupra Posted May 24, 2014 Share Posted May 24, 2014 Hi Guys, Going on a 4500 mile trip with the mr2 in a month, and its started making this loud noise (only occurs at idle) https://www.youtube.com/watch?v=V0NnUKCiTAM What could this be? Never heard anything like this before. Link to comment Share on other sites More sharing options...
Swampy442 Posted May 25, 2014 Share Posted May 25, 2014 Could be a belt tensioner bearing? Link to comment Share on other sites More sharing options...
L18msy Posted May 25, 2014 Share Posted May 25, 2014 Alternator? I have heard a few times now of these going due to water dripping onto them from the vents on the engine cover. Link to comment Share on other sites More sharing options...
wile e coyote Posted May 25, 2014 Share Posted May 25, 2014 As limsey said they prone to it Link to comment Share on other sites More sharing options...
Mk4Gaz Posted May 25, 2014 Share Posted May 25, 2014 Doesn't sound like alternator belt, sounds more like a bearing Link to comment Share on other sites More sharing options...
Scooter Posted May 25, 2014 Share Posted May 25, 2014 Remove the fan aux belt and briefly run the engine. If the noise has gone investigate each pulley on the belt run? Link to comment Share on other sites More sharing options...
ccssupra Posted May 25, 2014 Author Share Posted May 25, 2014 Thanks for the input guys, ill have a look later, at least I know where to start now! Link to comment Share on other sites More sharing options...
MattP Posted May 25, 2014 Share Posted May 25, 2014 Awwww man I had this in 2008 on my rev1 N/A its a simple problem but im lost as to what it was I do remember it being a simple fix Link to comment Share on other sites More sharing options...
ccssupra Posted May 25, 2014 Author Share Posted May 25, 2014 Awwww man I had this in 2008 on my rev1 N/A its a simple problem but im lost as to what it was I do remember it being a simple fix This is also a Rev 1 N/A! Didnt get a look today but going to be investigating tomorrow. Link to comment Share on other sites More sharing options...
perpy1878 Posted May 25, 2014 Share Posted May 25, 2014 Ive had two aw11's and both alternators when and started again on next one,only happened on start up got a horrid noise then it died away Link to comment Share on other sites More sharing options...
supra_ufo Posted May 27, 2014 Share Posted May 27, 2014 Cam have a word with Shahid at MR2 Developments in bradford, he is a nice guy and could probably give you good advice. If you want his mob drop me a PM Link to comment Share on other sites More sharing options...
TBDevelopments Posted May 29, 2014 Share Posted May 29, 2014 Finally something I can help with haha. It'll be duff alternator buddy. Simple enough to swap. Give tcbparts a message for a good condition recon unit Tim Link to comment Share on other sites More sharing options...
Graham1984 Posted May 29, 2014 Share Posted May 29, 2014 Finally something I can help with haha. It'll be duff alternator buddy. Simple enough to swap. Give tcbparts a message for a good condition recon unit Tim I was just about to suggest asking you Link to comment Share on other sites More sharing options...
TBDevelopments Posted May 29, 2014 Share Posted May 29, 2014 don't worry i'm always lurking about lol Tim Link to comment Share on other sites More sharing options...
ccssupra Posted May 30, 2014 Author Share Posted May 30, 2014 Not even going to bother then if its the alternator guys. Its going on a banger rally, we will just pray it doesnt fully fail on us haha Link to comment Share on other sites More sharing options...
TubbyTwo Posted May 30, 2014 Share Posted May 30, 2014 Cam have a word with Shahid at MR2 Developments in bradford, he is a nice guy and could probably give you good advice. If you want his mob drop me a PM Especially on how to forge dyno sheets Link to comment Share on other sites More sharing options...
TBDevelopments Posted May 31, 2014 Share Posted May 31, 2014 lol at tubbytwo. seems a shame you can get a used one for around £30 or a recon for about £70.00 and its not hard to fit. Banger rally for a simple alternator swap seems a bit extreme Tim Link to comment Share on other sites More sharing options...
Scott Posted May 31, 2014 Share Posted May 31, 2014 Indeed.... http://www.mr2oc.co.uk/know-your-2-knowledge-base/mr2-mk2.html?catid=9&kbartid=166 Link to comment Share on other sites More sharing options...
TBDevelopments Posted May 31, 2014 Share Posted May 31, 2014 theres an easier way of doing that job as well. i've never in 15 years removed the main alternator bracket from the engine block when fitting an alternator. Tim Link to comment Share on other sites More sharing options...
ccssupra Posted May 31, 2014 Author Share Posted May 31, 2014 lol at tubbytwo. seems a shame you can get a used one for around £30 or a recon for about £70.00 and its not hard to fit. Banger rally for a simple alternator swap seems a bit extreme Tim Its going on a banger rally anyway. Its a bit of a shed. The noise doesn't even come from the alternator, it comes from the throttle body Indeed.... http://www.mr2oc.co.uk/know-your-2-knowledge-base/mr2-mk2.html?catid=9&kbartid=166 Already seen it thanks though Link to comment Share on other sites More sharing options...
TBDevelopments Posted May 31, 2014 Share Posted May 31, 2014 throttle body? there isn't really anything there that can make that king of noise, you have the butter fly and the idle control valve thats about it. Although directly under the is the bellhousing and the gearbox. are you sure its coming from that area and does it make any difference in noise if you press the clutch? Tim Link to comment Share on other sites More sharing options...
TubbyTwo Posted May 31, 2014 Share Posted May 31, 2014 Alt bearings or alt belt. Had same on all my mr2s. Link to comment Share on other sites More sharing options...
ccssupra Posted May 31, 2014 Author Share Posted May 31, 2014 Well it does seem to be the idle control valve. Only ever makes the sound at idle, and is more of an "instant" sound, it doesnt matter what revs the engine is at, the alternator would surley make a different sound depeding on speed. The alternator seems to spin with the belt off smooth as silk, certianly doesnt indicate anything is wrong with it, and im not having any power issues. Link to comment Share on other sites More sharing options...
TubbyTwo Posted May 31, 2014 Share Posted May 31, 2014 Problem is just spinning it by hand you wont get the same load or speeds as when belt driven off the crank. Link to comment Share on other sites More sharing options...
TubbyTwo Posted May 31, 2014 Share Posted May 31, 2014 I would listen to Tim mate he knows his MR2s. Link to comment Share on other sites More sharing options...
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