Bargain Basement Electric

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dave
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Re: Bargain Basement Electric

Post by dave »

NewcastleFalcon wrote:
26 May 2021, 21:26
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what a lovely datsun...

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Mandrake
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Re: Bargain Basement Electric

Post by Mandrake »

Neil - I wonder if you have had any problems with the front driveshafts clicking on your Leaf?

Try turning the heater and pedestrian warning off so the car is silent, pull away slowly, listen for a click from the front when you apply power and another click when you apply the brake pedal to apply regen. For this to work you probably need to be <80% SoC so that you have full regen.

I think mine has been doing this very slightly since I've had it but it has got noisier now, and it turns out this is a very, very common problem with Leaf's with lots of reports on speakev and elsewhere, and there is also at least one Nissan service bulletin regarding it.

As mine is out of original car warranty I've been trying to find out exactly what the cause and cure is as I don't fancy paying Nissan to do it especially when many people have reported that after Nissan "fixed" it the click has return...

There is a lot of hearsay and misinformation about this issue but what I've been able to find out so far is that it is caused by the hub nut being inadequately torqued causing the stub axle to rock slightly on the spline in the hub...

Where it gets interesting is that the original hub nut torque figure is a crazy low 121Nm !! Compare this to a Xantia where the hub nut is torqued to 320Nm... The first Nissan bulletin addressing this issue was released some time around 2013 and yet some brand new 2020 62kWh Leaf's are still having this issue within 6 months.

In the original bulletin they tell you to remove the hub nut, push the stub axle partially out the back of the hub, apply molly grease to the rear part of the spline and hub and refit it with a new nut/washer (on models that have a washer) and torque back up to the same 121Nm figure...

But after doing some digging it appears that the recommended torque figure has been retroactively updated to 185Nm... also it seems there are at least two stub axle variations for different age Leaf's - some have a stub axle with a cut out keyway and use a stake nut to lock the nut after tightening it, while others have a normal shaft and nut with a nut cap and cotter pin. Not sure which my car has yet!

Anyway, thought I would bring it to your attention. I'm going to have a look at mine and see if I can tighten it up to 185Nm to see if that fixes the clicking...

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NewcastleFalcon
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Re: Bargain Basement Electric

Post by NewcastleFalcon »

Mandrake wrote:
03 Jun 2021, 11:09
Neil - I wonder if you have had any problems with the front driveshafts clicking on your Leaf?
Thanks for the heads up Simon.

In all my driving so far I have never consciously noticed it Simon. Air/con heater never in action these Summer days other than a quick flick if we are steaming up. I have never knowingly recognised the passenger alert noise either.

I fear now that I will be unable to shut out the possibility of a click should there be one to hear. Case of turn the radio up and carry on unless I feel some serious wheel wobble, or some humming, whining or groaning bearings. :-D

Regards Neil

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NewcastleFalcon
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Re: Bargain Basement Electric

Post by NewcastleFalcon »

BB Leaf down by the riverside
BB Leaf down by the riverside