YRV disc brakes

Forum: 

In replacing the discs on my YRV Premium I damaged one of the lower calliper slider bolt heads by persevering initially with a bi-hex socket when I could tell it had been massively overtightened by previous dealer attention.

So I bought a new bolt. The damaged slider bolt was covered with a clear lubricant.

Does anybody's workshop manual say what that lubricant is?

It cannot be mineral oil based or it will damage the 'rubber' dust seal on the bolt. From internet research it also shouldn't be copper slip. Rubber grease was suggested as it's high temperature, but it's not rubber that's to be lubricated. CV joint grease was also suggested as that's high temperature and doesn't attack the 'rubber' boot.

To give me confidence I need a product that says on the tin "specially formulated to lubricate the calliper slider pins on the Daihatsu YRV". I suspect I may not find such a product especially in small quantities.

Any professional guidance out there?

Grease

I normaly use Silicon grease but found it hard to get hold of once i ran out so bought some Mintex Cera Tec.

http://www.mintex.com/content/view/21/36/lang,en/

Its good for both pad squeal and to lube the sliders etc.
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Current- 04 Silver YRV TURBO
Past- 91 Black Charade GTti, 89 White Charade GTti, 1998 White 1.3 Hi-Jet.
A friend in need is a friend in deed, a friend always in need, an Effin nuisance!!

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Current- 04 Silver YRV TURBO
Past- 91 Charade GTti, 89 Charade GTti, 98 1.3 Hi-Jet.
A friend in need is a friend indeed, a friend always in need, an Effin nuisance Wink

YRV disc brakes

Thanks for that Dave.

In the end I didn't use the new slider bolts that I'd bought at great expense as the damaged bolt head reponds perfectly well to a full hex (as opposed to a bi-hex) socket. The bolts were well lubricated so I didn't need to do anything.

However I did look through my endless tins and tubes of lubricants, accumulated over 55 years and found a tube of silicone grease M490 which was quite squidgy, so usable should I have needed it.

This stuff is not recommended as a bearing lubricant, but as 'providing a water-repellent coating'. I agree that this is ok for the task. I noticed that the seals had leaked a bit and let enough water in to cause slight rust just at the end of the thread, by the seal joint. I covered this with a wipe of copper slip round the threads to ensure they come out easily next time.

YRV Tony

YRV Tony

Moly Grease

I have always used Moly Grease, (grease containing molybdenum disulphide) for this application. I can recall seeing it specified in a manufacturers shop manual many years ago, (might have been Hyundai).

If you need silicone grease it can be obtained at any plumbers merchant. It is used to aid the connection of plastic pipework. It is definitely not a lubricant and should not be used where lubrication is required. Last time I used any was when connecting cable to the LNB on my satellite dish to help prevent ingress of moisture and maintain the integrity of the connection.

YRV disc brakes

There seem to be a lot of different opinions on the best
'lubricant' for the slider pins. Many brake callipers have the same design and I would like to see a written manufacturers' recommendation.

It definitely shouldn't be mineral based or it will damage the rubber seals.

It definitely ought to be high temperature.

It would be an advantage if it provided a waterproof coating to the slider as traces of water can sneak past the seal.

It would be useful if it provided lubrication, although there is practically no movement to lubricate.

On the internet I've seen a strong case against using copper slip.

My local car shop says copper slip because it sounds right to them.

Daihatsu Technical say copper slip because it sounds right to them.

But nowhere have I seen a proper manufacturers' recommendation. Strange!

Hmmmmmm!

YRV Tony

YRV Tony

YRV Brakes. HE HE !!

2004 Sirion 1300 4 Track. And I love it.
Don't like the new shape much.

And I am going to light the blue touch paper and run.

I USE COPPERSLIP !! Smile

And I have done so for years with no problems at all with rubber gaiters etc.

I agree that water can gain a slight ingress into the bolt where the rubber seal is.(It did on my Sirion) Sad

It applied a liberal coating of Copperslip.
It doesn't anymore!
I can see no deterioration of any kind and I had my last Sirion 4 years and used copper grease on that as well.

Ah well - Never mind eh. Wink

Cheers, BobF.

2003 Sirion Rally 4. And I love it.
Don't like the new shape Sirion much.Sorry.

Oh no!!!!! There's more.

Having an hour or two to spare this morning I thought I would scan a few manuals to see what product they recommended for this application. I wasn't prepared for such a variation. These are the results:-

Alfa & Fiat - Tutela Zeta 2 (Fiat's own brand grease)

Nissan - Rubber grease.

Lexus - Lithium soap base glycol grease.

Jeep - Silicone grease.

Mazda - Rubber grease.

Haynes (various) - High temperature grease.

Toyota - Lithium soap base glycol grease.

Daihatsu (Rocky & Charade) - Rubber grease.

Daihatsu (Sirion) - Brake Grease.

So, in a nutshell, nip into Halfords and get a tub of High Temperature Lithium Soap Base Glycol Rubber Silicone Tutela Zeta 2 Brake Grease.

Ah!!! The joys of motoring.

YRV disc brakes

All I wanted at the start of this search for knowledge was a small tube of something that said "Specially formulated for the calliper slider bolts of the Daihatsu YRV". There couldn't be a simpler requirement could there?

And just as I really suspected all along, Jorustle's elegant research has revealed that it doesn't matter so long as the stuff is high temperature and not mineral based!

YRV Tony

YRV Tony

There's grease and there's

There's grease and there's grease.
No offence intended Jorustle but the Silicon grease i referred to was the stuff i obtained from Brakes International in Rochdale. It was supplied to them by Budweg in Denmark and probably the Worlds best remanufacturer of Brake Callipers.
I think it only shares the word Silicon with the plumbers stuff. I know of the polypipe assembly lube and is about as near to my silicon grease as baby oil is to motor oil.
I have a tin of copaslip and its great for alot of things but i did find it solidified on hot things like around brake areas etc and actualy had the opposite effect on sliders on my Charade GTti. I also noticed it made the slider bolt gaiters baggy.
I have tried alsorts over the years and found the Budweg stuff that comes in small one use caplets is perfect and so far the Mintex Cera Tec seems to do the job too.
I dont think the Budweg stuff is available to buy as singles, maybe in bulk only but i was given a handful by Brakes International after i asked what was best for the sliders on my Charade GTti after having loads of problems with them seizing.

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Current- 04 Silver YRV TURBO
Past- 91 Black Charade GTti, 89 White Charade GTti, 1998 White 1.3 Hi-Jet.
A friend in need is a friend in deed, a friend always in need, an Effin nuisance!!

---------------------------------------------------
Current- 04 Silver YRV TURBO
Past- 91 Charade GTti, 89 Charade GTti, 98 1.3 Hi-Jet.
A friend in need is a friend indeed, a friend always in need, an Effin nuisance Wink

Another suggestion

I'm having to give attention to my 'new' (well, 14 month old) YRV brake discs. Something to do with using unevenly worn but still meaty pads on a new disc....and not ensuring enough concentrated braking to quickly bed them in.

The hoary problem of 'lubricating' the calliper slider bolts raised its head again as this time the original Daihatsu goo had definitely thinned.

I casually looked in a Haynes manual lying on my book shelf and it proposed graphite grease.

So there's another suggestion to add to our list of suitable and unsuitable 'lubricants' for calliper bolts.

YRV Tony

I Use

I used Red Rubber Grease when i bought 2 new slide pins (and a new rubber sleeve for the top pin) after reseaching the net.............touchwood no probs yet. I was having terrible problems with the n/s brakes sticking on. 2 new pins and a sleeve and some red rubber grease and all is good Wink

Never use copper slip/ease as its a anti seize compound not a lubricant (as i found out).........

Wayne

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2004 Yellow YRV Turbo