MG ZS EV Crack/click noise

Eclectic said:
I think the use of Copaslip is an unknown dark art in modern workshops. My tool box still has traces of it after 40 years out of the trade!
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There has been a lot of improvements in brake pad lubricants over the years.
Ceramic based lub’s are very popular now.
Copper grease still has its uses in other applications.
It still offers a very good anti seize facility.
Items assembled with the use of copper slip can be disassembled easily even after many years of being exposure to water and road smuts.
You still beggars belief why I still see brake pads and pins installed without using any type if the correct lubricant used on assembly.
This only results in the car requiring a full brake service prematurely due to sticking brake pads etc.
Maybe it’s done on purpose then ?.
 
N2STY said:
Unfortunately as I have mentioned in another post copper slip is no longer recommended as it can affect senses like abs\speed that use magnetic fields but luckily there are some really good non magnetic brake lubes out there now
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Odd given copper is not magnetic...
 
N2STY said:
You're right a magnet will not stick to copper but it managers to affect magnetic Fields or something like that and it's a big enough affects to make electricity
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Faraday's law of electromagnetic induction. A conductor moving through a magnetic field induces an electrical current. This electrical current then causes a magnetic field in the condutor (an electromagnet effectively), which causes hysteresis, which is a kind of magnetic resistance.
 
N2STY said:
You're right a magnet will not stick to copper but it managers to affect magnetic Fields or something like that and it's a big enough affects to make electricity
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I'd be suitably amazed if "two dabs on brake pad contact points" had much of an effect electrically speaking 🤷🏻‍♂️
 
Gadget Geek said:
Faraday's law of electromagnetic induction. A conductor moving through a magnetic field induces an electrical current. This electrical current then causes a magnetic field in the condutor (an electromagnet effectively), which causes hysteresis, which is a kind of magnetic resistance.
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I wouldn't be putting any "copper slip" on the rotating disk for sure. It's only ever been put on the back of the brake pads to stop break squeal or in the edges of the pads where they contact the callipers so there is no way the copper slip would be moving in a magnetic field unless it is the motion of the car through the weak Earth's magnetic field. There are two reasons for this to be of no material consequence. 1) any copper in copper slip is particular and not continuously connected so any induces currents would essentially be confined as an eddy current within the particulate. 2) even if a number of particulates were to be randomly in contact with others, which is extremely doubtful anyway, any current would be very small and be dissipated into the significantly larger mass of conductive steel or alloy they are in contact with.

Although I've not tested copper slip for its electrical properties, if it were to be particularly electrically conductive, then I am sure that it would have electrolytic relations with the dissimilar metals it has been used on over the decades. However, its primarily made for its heat conductive properties and recommended for places where there might otherwise be excessive corrosion and high temperatures such as breaks, wheel nuts and (not applicable to BEVs) exhaust systems where application to threads can aid assembly and disassembly.
 
Lovemyev said:
There has been a lot of improvements in brake pad lubricants over the years.
Ceramic based lub’s are very popular now.
Copper grease still has its uses in other applications.
It still offers a very good anti seize facility.
Items assembled with the use of copper slip can be disassembled easily even after many years of being exposure to water and road smuts.
You still beggars belief why I still see brake pads and pins installed without using any type if the correct lubricant used on assembly.
This only results in the car requiring a full brake service prematurely due to sticking brake pads etc.
Maybe it’s done on purpose then ?.
Click to expand...
They now call that an ‘advanced’ brake service! This is where the brakes are inspected cleaned and lubricated as they should be anyway - but you’re charged more for doing what should be always done anyway 🤪

N2STY said:
Unfortunately as I have mentioned in another post copper slip is no longer recommended as it can affect senses like abs\speed that use magnetic fields but luckily there are some really good non magnetic brake lubes out there now
Click to expand...
The makers of these type of greases still recommend them for brakes. I have used it for Years, but you’ve got me thinking. Do you have details of where you have seen the recommendation to no longer use it?
 
Cocijo said:
They now call that an ‘advanced’ brake service! This is where the brakes are inspected cleaned and lubricated as they should be anyway - but you’re charged more for doing what should be always done anyway 🤪
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I had built up a really good relationship with a senior tech at VW when we had our Golf PHEV.
I asked him once, how often do you remove road wheels these days to check the condition of brake pad wear.
Rarely was the quick answer, we inspect them with the road wheel still in place and use our judgement to quote the percentage of wear to the customer on the job sheet.
They are not really that interested, in most cases, their attitude is this, they either need changing or they don’t !.
Unless the customer presents with a problem of brake pads squealing or sticking, then we will recommend a full strip / clean and lubricate or replacement if more than 75% worn.
The first time that wheels will be removed, will either by a customer request of a rotation or when the tyres need replacing.
Other than that, they stay on the car !.
 
Lovemyev said:
I had built up a really good relationship with a senior tech at VW when we had our Golf PHEV.
I asked him once, how often do you remove road wheels these days to check the condition of brake pad wear.
Rarely was the quick answer, we inspect them with the road wheel still in place and use our judgement to quote the percentage of wear to the customer on the job sheet.
They are not really that interested, in most cases, their attitude is this, they either need changing or they don’t !.
Unless the customer presents with a problem of brake pads squealing or sticking, then we will recommend a full strip / clean and lubricate or replacement if more than 75% worn.
The first time that wheels will be removed, will either by a customer request of a rotation or when the tyres need replacing.
Other than that, they stay on the car !.
Click to expand...
If it ain't broke....
 
Lovemyev said:
I had built up a really good relationship with a senior tech at VW when we had our Golf PHEV.
I asked him once, how often do you remove road wheels these days to check the condition of brake pad wear.
Rarely was the quick answer, we inspect them with the road wheel still in place and use our judgement to quote the percentage of wear to the customer on the job sheet.
They are not really that interested, in most cases, their attitude is this, they either need changing or they don’t !.
Unless the customer presents with a problem of brake pads squealing or sticking, then we will recommend a full strip / clean and lubricate or replacement if more than 75% worn.
The first time that wheels will be removed, will either by a customer request of a rotation or when the tyres need replacing.
Other than that, they stay on the car !.
Click to expand...
It’s all about time - get it done as quick as you can. We get charged at the workshop rate x allowance to do the job, it rarely takes as long but we are still charged for it.
 
AK OK said:
If it ain't broke....
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True !.
This premature brake service work is very likely due to the fact that brake pads etc receive no lubricant when they are assembled into the callipers by the supplier.
But there again, it brings in paid work into the workshop !.
Brake service work will not be included in the price of a standard annual service and most certainly will not be covered under warranty.
 
Common sense should really be saying that a dab of copper slip in the right places, won’t start a quantum thermodynamic dilithium flux, that will affect the ozone layer and cause a rift in the space time continuum.

Lovemyev said:
True !.
This premature brake service work is very likely due to the fact that brake pads etc receive no lubricant when they are assembled into the callipers by the supplier.
But there again, it brings in paid work into the workshop !.
Brake service work will not be included in the price of a standard annual service and most certainly will not be covered under warranty.
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Slightly off topic. My local dealer now sends me a video of the car when in the workshop. This consists of 20secs of the underside of the car while up on a lift - nice gesture - no idea what value it adds, other than proving it did go up and have a little ride on a lift.
 
Cocijo said:
Slightly off topic. My local dealer now sends me a video of the car when in the workshop. This consists of 20secs of the underside of the car while up on a lift - nice gesture - no idea what value it adds, other than proving it did go up and have a little ride on a lift.
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They have nicked this idea from both BMW & VAG who have been doing this for a good few years now.
Health check are done automatically now prior to commencing any work these days at most main dealers, even if you did not request it !.
A short video is sent out to the customer outlining condition of the brakes / suspension / exhaust ( ICE ) etc and usually the remaining tread depth written on the tread of each tyre in chalk.
Looking for any additional work - you make up your own mind on that one !.
That is the value of doing it.
VW issued a recall to have the battery pack removed on our Golf, as there had been a couple of instances of moisture entering into the pack.
The car needed to go to a dedicated dealer in Manchester to have the work done and due to the distance involved, we had a lone car for a couple of days.
We dropped off the car and that afternoon we received a call to say that after a conducting a full FREE health check, that the car required some extra work doing and did I want it doing while it was at the dealership.
They wanted to carry out a annual service and said that the brake fluid replacement was dangerously over due !.
The cost for this additional work was over £300 if I remember correctly.
The HV battery work was under warranty and therefore no money passing through the till.
I asked the service advisor if he had checked the service history book, I had left on the passengers seat ?.
He replied - No.
"If you had checked it before calling, you would have seen that the service was carried out by my local VW agent two weeks ago and the brake fluid was replaced last year ! ( every two years on a VW ) so that will be a NO then to that up sell I think.
Phone when down - Cheers !.
 
Cocijo said:
They now call that an ‘advanced’ brake service! This is where the brakes are inspected cleaned and lubricated as they should be anyway - but you’re charged more for doing what should be always done anyway 🤪


The makers of these type of greases still recommend them for brakes. I have used it for Years, but you’ve got me thinking. Do you have details of where you have seen the recommendation to no longer use it?
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I have talked about it here
Post in thread
2nd Service Expensive and New Brake Discs needed? Really?
Here is a bit more info

mintex.com

Copper slip vs Ceratec: facts for the modern mechanic

mintex.com mintex.com
 
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Guys I sometimes hear that click noise when I break during driving as well. Not always....
I am pretty sure they are correct with this one. The noise comes from the breaking pads...

However not sure if that is normal still...lol
 
Lovemyev said:
They have nicked this idea from both BMW & VAG who have been doing this for a good few years now.
Health check are done automatically now prior to commencing any work these days at most main dealers, even if you did not request it !.
A short video is sent out to the customer outlining condition of the brakes / suspension / exhaust ( ICE ) etc and usually the remaining tread depth written on the tread of each tyre in chalk.
Looking for any additional work - you make up your own mind on that one !.
That is the value of doing it.
VW issued a recall to have the battery pack removed on our Golf, as there had been a couple of instances of moisture entering into the pack.
The car needed to go to a dedicated dealer in Manchester to have the work done and due to the distance involved, we had a lone car for a couple of days.
We dropped off the car and that afternoon we received a call to say that after a conducting a full FREE health check, that the car required some extra work doing and did I want it doing while it was at the dealership.
They wanted to carry out a annual service and said that the brake fluid replacement was dangerously over due !.
The cost for this additional work was over £300 if I remember correctly.
The HV battery work was under warranty and therefore no money passing through the till.
I asked the service advisor if he had checked the service history book, I had left on the passengers seat ?.
He replied - No.
"If you had checked it before calling, you would have seen that the service was carried out by my local VW agent two weeks ago and the brake fluid was replaced last year ! ( every two years on a VW ) so that will be a NO then to that up sell I think.
Phone when down - Cheers !.
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Many years ago I had an "N" Reg Renault Laguna and I think it was the 2 or possibly 3rd annual service when I put the car into a newly franchised main dealer (Toomey Motors). They called me with a list of 7 items if I recall of extra work including split and leaking CV Gator, leaking exhaust etc ie all under the car. I said "no" to the £1270 extra work and said, "just do the service". I then took the car to two other Renault dealers and one small independent garage I used for my other car. Only one item, a slight oiliness on the engine end of the drive shaft showed up. I was advised to just keep a watching brief. I kept the car for a further 17-18 years in the family eventually as a second car and both my kids learned to drive in her, but none of those issues ever showed up again and I have never had a car serviced their since.
 
AK OK said:
Mintex advert alert! 😂

Reads like promo marketing bs to me I'm afraid.
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How did I know you would say that mintex is made by tmd friction that make many brands like brembo and also supplier most manufacturers
Screenshot_20221009_213851_com.android.chrome.jpg

Brembo b quiet is exactly the same stuff just different branding

 
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