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Home > Maintenance & Modifications > How much vibration is acceptable in a SD4? |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
It also might or might not be related but I can see a lot of air bubbles going through the diesel line from the diesel filter (which I replace in every oil change but never payed attention to this before).
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3rd Sep 2020 2:49 pm |
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Roddos Member Since: 29 Mar 2019 Location: Yorkshire Posts: 16 |
I have just bought a sd4 and mine was very similar, on inspection it looked like some one had jacked the car up against the vibration mounting on the subframe and broken one of the welded mounts, it had also bent the exhaust hangers and they were touching each other, I re-welded the mount and reposition the exhaust hangers and the vibration has almost gone, before I could feel it through my feet and the car at around 1700 rpm and it felt like a misfire, now feels normal. Hope this helps |
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7th Oct 2020 8:27 am |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
But the engine was visible "shaking" like mine? Freelander 2 2014 SD4 Automatic HSE Fuji White
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7th Oct 2020 11:12 am |
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Roddos Member Since: 29 Mar 2019 Location: Yorkshire Posts: 16 |
The top engine mount looks to have the same amount of movement but not the air box, yours looks to be coming from the rear of the engine as the fuel pipes have a lot of movement, make sure the exhaust is not to tight on the hangers and recheck the bottom mounts, sometimes its best to loosen the mount while the engine is running and then re-torque. |
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12th Oct 2020 10:03 am |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
I will definitely check that, thanks.
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12th Oct 2020 1:50 pm |
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Roddos Member Since: 29 Mar 2019 Location: Yorkshire Posts: 16 |
Torque converter lockup only occurs in drive , so unless it’s permanently locked in which would cause all sorts of driving problems, does the Rpm definitely go up and down while at tick over ? |
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12th Oct 2020 2:08 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
Not really.
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12th Oct 2020 2:34 pm |
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Roddos Member Since: 29 Mar 2019 Location: Yorkshire Posts: 16 |
The Stall speed test is quite an old test, which was used as an general test of the automatic gearboxes, the stall test (vehicle in drive, brakes applied full, then the accelerator pressed full and the RPM speed noted and compared with manufactures specifications.
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12th Oct 2020 3:19 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
I didn't try to run the engine without the auxiliary belt but I have replaced all the belts, bearings, and tensioners a couple of weeks ago due to the age of them.
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12th Oct 2020 3:41 pm |
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Roddos Member Since: 29 Mar 2019 Location: Yorkshire Posts: 16 |
The reason I asked about trying without the belt is because the alternator has a oneway clutch which can cause noise/vibration at tick over- In the trade Vibration drops into the NVH sector (Noise Vibration and harshness) and when things get really difficult the best option is to use a NVH kit such as the Pico NVH kit, it may help if you can find a technician that uses this sort of kit. |
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12th Oct 2020 3:53 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
Alright, I will check the exhaust system (seems to be the easiest one) and the auxiliary belt to discard the alternator.
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12th Oct 2020 4:12 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
One thing I forgot to mention is that if I drive using the sport mode, the vibration is almost gone (due to the revs be kept over the usual range).
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12th Oct 2020 4:29 pm |
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Kage Member Since: 03 Oct 2018 Location: Midlands Posts: 236 |
Mine has an alternator clutch fault too (diagnosed this morning) and sounds just like that. Displays all those symptoms too. |
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12th Oct 2020 8:37 pm |
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sobrinho Member Since: 22 Jul 2019 Location: Brazil Posts: 96 |
1. The diagnostic was done in the same way? Removing the auxiliary belt?
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12th Oct 2020 8:38 pm |
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