ualdep
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Joined: Thu Jan 24, 2013 9:36 am
Delivery Date: 24 Nov 2011
Leaf Number: 015625

Clicking noise during acceleration and decceleration

Mon Apr 01, 2013 8:08 am

I have a 2012 SL Leaf. Every time I let off the electric pedal & press the electric pedal, I hear a moderate clicking noise .

I never noticed it before because the radio or road noise covered it up & I'm getting old. But my younger son heard it 1st.

The Nissan mechanic said it was the brake pads shifting. Anyone else experience this?

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garygid
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Re: Clicking noise during acceleration and decceleration

Mon Apr 01, 2013 8:59 am

The electric pedal is the "accelerator" pedal?

Without touching the brake pedal, there should not be
any contact of the brake pads with the rotor, unless
something is really strange.

Very worn brakes usually create a warning noise when
the brakes are applied.

But, I cannot hear high frequency noises either.
From most folks, the turn signal clicker is VERY LOUD,
but I can barely hear it. What did you say? :D
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Nubo
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Re: Clicking noise during acceleration and decceleration

Mon Apr 01, 2013 9:22 am

Is it just one click, or is it "click-click-click-click....". If the latter, does the frequency seem to depend on vehicle speed? Any worse if accelerating in a turn? Left? Right?

The one thing that comes to mind is Constant Velocity joints. If these are wearing, you can hear a repetitive clicking that will first become noticeable during acceleration/deceleration and usually more pronounced when turning in one direction.
I noticed you're still working with polymers.

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mwalsh
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Re: Clicking noise during acceleration and decceleration

Mon Apr 01, 2013 10:22 am

Nubo wrote:The one thing that comes to mind is Constant Velocity joints. If these are wearing, you can hear a repetitive clicking that will first become noticeable during acceleration/deceleration and usually more pronounced when turning in one direction.


+1. And we've heard of some CV joints going out already. Not a massive number, but some.

When you make your turns, the noise will come from the side opposite the turn too. If you get noise with both L and R turns, then both CV joints are bad.
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ualdep
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Joined: Thu Jan 24, 2013 9:36 am
Delivery Date: 24 Nov 2011
Leaf Number: 015625

Re: Clicking noise during acceleration and decceleration

Mon Apr 01, 2013 11:46 am

OK; only 1 clk when I lift off the accel. pedal & 1 clk when I press the accel pedal;

Mechanic said "shifting of the pads in the calipers" not brake application;

perhaps a design issue; don't think CV joints or brakes.

Tks for ur replies.

QueenBee
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Re: Clicking noise during acceleration and decceleration

Mon Apr 01, 2013 1:12 pm

So from what I understand an issue that will probably end up impacting every LEAF is a clunking sound which occurs just once when changing directions (forward to reverse and reverse to forward).

This specific issue has to do with the play that the brake pads have within the retaining clips on the calipers. To reproduce is simple: Backup your car, apply brakes to stop. Then move forward, you should hear the clunk. It'll happen in the reverse order as well.

To be clear this will only happen once when changing directions. So if you accelerate, brake, etc. while moving forward and can make the noise happen each time then it is a different issue.

Gary, BTW: the brake pads are basically always in contact with the rotor. The issue I describe above would actually not be an issue if the brake pads were not in contact with the rotor.

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garygid
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Re: Clicking noise during acceleration and decceleration

Mon Apr 01, 2013 1:41 pm

I believe, with properly adjusted disc brakes, that the pads
should NOT touch the rotor during normal non-braking operation.
The cylinder plunger should be pulled slightly back off
the back of the brake pad, by the rubber gasket/seal around the
cylinder, which should allow the pad to move back off the rotor.

Any touching would produce a lot of heat, some drag, and
some wear on both the pad and the rotor.

But, maybe that was in the "olden days"?
See SOC/GID-Meter and CAN-Do Info
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2010 Prius, 2014 silver Tesla S
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fulloptions
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Re: Clicking noise during acceleration and decceleration

Mon Apr 08, 2013 3:36 pm

ualdep wrote:I have a 2012 SL Leaf. Every time I let off the electric pedal & press the electric pedal, I hear a moderate clicking noise .

I never noticed it before because the radio or road noise covered it up & I'm getting old. But my younger son heard it 1st.

The Nissan mechanic said it was the brake pads shifting. Anyone else experience this?


Hi I have a
2012 SL WITH 19000 MILES just started doing the same thing. When I step on the brake I get a click sometimes up to 3 clicks.
also afer stoping at a light. When I step back on the accelarator as the car moves I hear clicks again. It is very annoying. I don't know what to do about it. Nissan should come up with some kind of Sevice Bulletin. Anybody out there that knows how to fix this ?
Except this annoying issue, I can say Leaf has been a best car I have ever owned. I absolutely love the car. :D

Here is some of my contributions to you all.
I noticed the rear door entry does not have any potection for the paint. I have kids that go in and out. I instaled self stick anti skid pads for the entry now the paint is protected. and looks nice.

ualdep
Posts: 9
Joined: Thu Jan 24, 2013 9:36 am
Delivery Date: 24 Nov 2011
Leaf Number: 015625

Re: Clicking noise during acceleration and decceleration

Mon Apr 08, 2013 6:08 pm

what did the dealer say about ur problem?

if U havent done do, plz so do to get their attn. tks

QueenBee
Posts: 1564
Joined: Sun Aug 08, 2010 5:14 pm
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Leaf Number: 2062
Location: Bellevue (Seattle), WA

Re: Clicking noise during acceleration and decceleration

Mon Apr 08, 2013 11:23 pm

garygid wrote:I believe, with properly adjusted disc brakes, that the pads
should NOT touch the rotor during normal non-braking operation.
The cylinder plunger should be pulled slightly back off
the back of the brake pad, by the rubber gasket/seal around the
cylinder, which should allow the pad to move back off the rotor.

Any touching would produce a lot of heat, some drag, and
some wear on both the pad and the rotor.

But, maybe that was in the "olden days"?


AFAIK the design of disc brakes hasn't changed much and on the cars I've worked on the pads always make a swoosh sound when you free spin the tires. It's not enough to cause heat, drag or wear but enough to hear. If the caliper retracts when you let off the brake pedal there still isn't anything they retracts the pad since the caliper and pad are floating so it would still stay in contact.

The reason for the issue I described above is the result of the pads still being in contact with the rotor after letting off the pedal and then shifting between the clips

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