flembot 1 Posted Monday at 10:24 PM Share Posted Monday at 10:24 PM I know a lot of people talk about the "tapping noise" when starting from cold. But just yesterday my Aygo has started to have rather loud tapping noise (louder than I remember the tapping noises used to be). And this time this tapping noise does NOT go away when the engine gets warm. Its like a metal slapping sound. It happens when I accelerate (incl accelerating gently). It is the loudest the slower I am going and more quiet the faster I am. I had just had my Aygo serviced on the 9th February. So that's about two weeks ago. And it has been fine but as of yesterday this pretty loud noise has started. Its definitely coming from under the bonnet - maybe its the engine but I don't know. It sounds like its coming from a part that located where you add screen wash. I don't think its the timing belt (that was changed in 2014) but it sounds like a part close to that (I don't know the name of the part I'm just listening with my ear) Any ideas? Yes the Oil level is fine 🙂 Quote Link to post Share on other sites
FROSTYBALLS 3,424 Posted Monday at 11:39 PM Share Posted Monday at 11:39 PM The Toyota 1.0 litre engine used in the Aygo has a timing chain rather than belt. Quote Link to post Share on other sites
flembot 1 Posted Monday at 11:48 PM Author Share Posted Monday at 11:48 PM 8 minutes ago, FROSTYBALLS said: The Toyota 1.0 litre engine used in the Aygo has a timing chain rather than belt. It looks like a belt to me after looking under the bonnet. From memory I think my Dad changed it to a belt in 2014 Quote Link to post Share on other sites
PetrolDave 30 Posted Tuesday at 06:36 AM Share Posted Tuesday at 06:36 AM The belt you can see is the auxiliary belt that drives the water pump, alternator (and aircon compressor if you have aircon) and has nothing to do with valve timing. The timing chain is not visible without removing covers. Quote Link to post Share on other sites
SAM LOVERS HER TOYOTAS 91 Posted Tuesday at 08:20 AM Share Posted Tuesday at 08:20 AM Sorry to hear of your troubles. It might help if you could upload a video or sound clip maybe? Quote Link to post Share on other sites
steveo3002 25 Posted Tuesday at 10:46 AM Share Posted Tuesday at 10:46 AM lots of people say theirs has always rattled , if its recently had a service i would suggest theyve used a thinner Oil than it had in it before hand , mine it much louder on 0w/20 or 5w/30....sounds almost normal on 10w/40....all those are approved grades of Oil for that engine Quote Link to post Share on other sites
steveo3002 25 Posted Tuesday at 10:52 AM Share Posted Tuesday at 10:52 AM water pump wear and alternator siezing is also known of , if you have a diy helper maybe they can slip the aux belt and start it briefly to see if the nose goes away when those parts are eliminated Quote Link to post Share on other sites
flembot 1 Posted Tuesday at 11:09 AM Author Share Posted Tuesday at 11:09 AM 15 minutes ago, steveo3002 said: lots of people say theirs has always rattled , if its recently had a service i would suggest theyve used a thinner oil than it had in it before hand , mine it much louder on 0w/20 or 5w/30....sounds almost normal on 10w/40....all those are approved grades of oil for that engine It says “5w30 synth engine oil” on my invoice lol. Strange that it’s only starting to sound like this now rather than as soon as I left the garage, no? My dad seems to think it could be an exhaust noise. I’m not so sure. Quote Link to post Share on other sites
flembot 1 Posted Tuesday at 11:11 AM Author Share Posted Tuesday at 11:11 AM 4 hours ago, PetrolDave said: The belt you can see is the auxiliary belt that drives the water pump, alternator (and aircon compressor if you have aircon) and has nothing to do with valve timing. The timing chain is not visible without removing covers. Your right that must be what I’m seeing. Quote Link to post Share on other sites
flembot 1 Posted Tuesday at 11:12 AM Author Share Posted Tuesday at 11:12 AM 2 hours ago, SAM LOVERS HER TOYOTAS said: Sorry to hear of your troubles. It might help if you could upload a video or sound clip maybe? I’ll try when I’m driving it later. it’s a bit windy in Belfast today but will try and see if my phone can pick up the noise without too much interference lol Quote Link to post Share on other sites
flembot 1 Posted Tuesday at 11:13 AM Author Share Posted Tuesday at 11:13 AM 20 minutes ago, steveo3002 said: water pump wear and alternator siezing is also known of , if you have a diy helper maybe they can slip the aux belt and start it briefly to see if the nose goes away when those parts are eliminated Water pump was replaced in 2018. ‘slip’ the aux belt? Quote Link to post Share on other sites
PetrolDave 30 Posted Tuesday at 11:26 AM Share Posted Tuesday at 11:26 AM 11 minutes ago, flembot said: ‘slip’ the aux belt? Temporarily take it off to see if the noise is from water pump or alternator (or aircon compressor) 😊 Quote Link to post Share on other sites
steveo3002 25 Posted Tuesday at 02:36 PM Share Posted Tuesday at 02:36 PM 3 years on a water pump means nothing , some fail in no time , theres some shocking quality parts sold these days if you feel the garage is trustworthy pop back and ask them , might be very obvious to a mechanic vs internet folk guessing at stuff Quote Link to post Share on other sites
FROSTYBALLS 3,424 Posted Tuesday at 03:11 PM Share Posted Tuesday at 03:11 PM 4 hours ago, steveo3002 said: 0w/20 or 5w/30 0W-20 Oil is for Feb 2009 Aygos onwards which had the Optimal Drive improvements. Cars built before Feb 2009 have 5W-30 as the preferred Oil. Quote Link to post Share on other sites
PetrolDave 30 Posted Tuesday at 03:19 PM Share Posted Tuesday at 03:19 PM 4 minutes ago, FROSTYBALLS said: 0W-20 oil is for Feb 2009 Aygos onwards which had the Optimal Drive improvements. Cars built before Feb 2009 have 5W-30 as the preferred oil. And the latest Aygos have 0W-16 Oil Engine oil: What oil for my Toyota? Quote Link to post Share on other sites
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