Home > Technical (L322) > HELP bad engine sound! 4.4 TDV8 |
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Dactonx Member Since: 14 May 2022 Location: United Kingdom Posts: 3 |
Going to have car the car recovered back there, wish me luck. |
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16th May 2022 9:52am |
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AJGalaxy2012 Member Since: 11 Jun 2018 Location: Gainsborough Posts: 1464 |
Good luck BMW i3 Electric Car
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16th May 2022 2:11pm |
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DrRob Member Since: 16 Apr 2015 Location: Petersfield, Hampshire Posts: 4302 |
Get your cash back if less than 30days. No brainer.
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16th May 2022 2:39pm |
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DrRob Member Since: 16 Apr 2015 Location: Petersfield, Hampshire Posts: 4302 |
Ditto. Full refund and go.
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16th May 2022 7:03pm |
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JNC Member Since: 23 Feb 2020 Location: UK Posts: 292 |
That has been worked on before.
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16th May 2022 8:43pm |
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Mike Edwards Member Since: 13 Feb 2021 Location: Northampton Posts: 226 |
Interesting, I was convinced that was a video I shot until I saw your name at the bottom. I have a 2011 TDV8 4.4 making exactly the same noise. Someone has even cut off the top of the fan shroud exactly as has been done on yours. I assumed it was a lifter problem but I've not managed to look in to it yet. |
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17th May 2022 10:29am |
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Mike Edwards Member Since: 13 Feb 2021 Location: Northampton Posts: 226 |
What do you think is wrong with the piston that would make a tapping noise rather than a terminal rattle? |
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17th May 2022 10:30am |
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Caesium Member Since: 21 Sep 2021 Location: Essex Posts: 451 |
Show the dealer this video, this is what a TDV8 should sound like, not that clattering yours makes.
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17th May 2022 10:55am |
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Cam-Tech-Craig Member Since: 03 Aug 2011 Location: Gloucestershire Posts: 16284 |
Hmmm, has anyone checked the injectors? Sounds like it might be a duff injector... |
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17th May 2022 11:01pm |
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QuebecTango Member Since: 06 Jan 2019 Location: Brighton Posts: 55 |
Based my opinion on experience in commercial vehicle repair, where we have experienced similar “tap” which often turns out to be piston related. It’s possible that the piston has seized and the skirt has picked up. Seized due to a local overheat. Maybe oil cooling jet to a particular cylinder blocked or misaligned - if this engine has them. Have also known vehicles to run low on coolant and the same thing happen to the hottest cylinder ie no 4 or 5 on a straight 6.
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18th May 2022 4:38am |
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dingg1 Member Since: 29 Jun 2013 Location: PORTUGAL Posts: 1340 |
Timing chain jumped a tooth and valve 'kissing' top of piston?
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18th May 2022 8:06am |
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Mike Edwards Member Since: 13 Feb 2021 Location: Northampton Posts: 226 |
Have you tried disconnecting the injectors one by one on that side to se if the noise stops? |
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19th May 2022 8:59pm |
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Mike Edwards Member Since: 13 Feb 2021 Location: Northampton Posts: 226 |
Surely that would be a knock rather than a tap? |
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19th May 2022 9:00pm |
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dingg1 Member Since: 29 Jun 2013 Location: PORTUGAL Posts: 1340 |
Not necessarily, happened to me on a bmw 325tdse, everyone thought it was an injector off, only became apparent when the head was off, didn't even bend the valve stem and just a small depression in the top of the piston |
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20th May 2022 6:26am |
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