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Home > Maintenance & Modifications > How much vibration is acceptable in a SD4? |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4640 |
@sobrinho
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19th Oct 2020 10:36 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
@alex_pescaru all bets are in the timing belt being slight out of time or the fuel injector since all the other options does not seem fit or have been discarded.
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19th Oct 2020 10:42 pm |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4640 |
Maybe you should think the other way around, as the checking of an injector is much more difficult, with the DIYer tools, that the timing.
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20th Oct 2020 8:36 am |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
Genuine diesel filter made no difference.
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20th Oct 2020 2:02 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
Here are some videos of the engine running.
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20th Oct 2020 3:42 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
I did a small trip today (about 100km) and the car was shaking as usual.
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21st Oct 2020 3:41 pm |
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Roddos Member Since: 29 Mar 2019 Location: Yorkshire Posts: 16 |
Not seen that code for a long time - suspect a faulty code reader as it refers to a manual clutch, and is controlled by an ecu, so in other words a manual clutch and manual gearbox but operates like an automatic, similar to the old Daf and Volvo system but without the CVT.
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21st Oct 2020 4:54 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
I believe the last garage done some test with the torque converter, probably the stall one, that might be the reason for the DTC.
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21st Oct 2020 5:27 pm |
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jules Member Since: 13 Dec 2007 Location: The Wilds of Warwickshire Posts: 4567 |
The "slo mo" video sound is interesting - to my ears its sounds if there is an irregular rhythmn to the engine cycle. I dont know if this is normal for a 4 stroke, 4 cyclinder diesel but I wonder could it indicate a injector or valve problem. Has the cylinder compression been tested ? Is it worth making a slo mo video of a healthy TD4 for comparison ? Jules |
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21st Oct 2020 10:40 pm |
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alex_pescaru Member Since: 12 Mar 2009 Location: RO Posts: 4640 |
The "sane" engine from the first post: http://www.axelzone.ro/car/lr/engine.mp3
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22nd Oct 2020 12:02 am |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
Indeed, looks the same.
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23rd Oct 2020 1:03 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
Smaller front axl shaft replaced (driver's side) and the vibration is almost gone, 80% less I would say.
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29th Oct 2020 7:55 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
The vibration/resonance is back so definitely not the small front axle.
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9th Nov 2020 5:35 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
Took to another garage and they suggested to lub the other front axl, they did and no changes
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25th Nov 2020 11:55 pm |
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