Brake Fluid Quantity

[johno]

How much Brake Fluid is there in the S series system ??
1.5 litres ??

Where can I buy Dot 5.1 fluid on-line ?? Can't find anywhere at all...

Cheers

Mark

[shpub]

Depends if you follow the instructions in the S bible to push the pistons back to clean out the callipers

A litre bottle should be enough.

You get it from a local decent motor factors (even Halfords styock it these days). I get mine from CASFCO or PARTCO. As it is only about 6-7 pnds a litre, you'd pay more PP online. Demon Tweeks sell it but it is more expensive.

[johno]

Steve,

Cheers ! I wish I cou;ld find a decent enough motor factors at the moment. Hardly had time to do anything lately.

Cheers

Mark
PS - Living somewhere new and don't know anywhere with new job demanding 11hr a day.

[roulli]

quote:
Depends if you follow the instructions in the S bible to push the pistons back to clean out the callipers

Does one need to clean the callipers as well with dot 5.1 fluid. I thought it was only dot5 that required total cleaning since silicone based and dot5.1 was compatible with dot3 & dot4?

Have a look at www.panteracars.com/motul.html
They have dot4 racing fluid (non-silicone based!)from Motul that outperformes Motul dot5.1. when it comes to boiling point.
Weird! Does this mean that this dot4 liquid is the best non-silicone alternative?

Cheers Patrick

[shpub]

No Dot 4 and Dot 5.1 simply specify a minimum standard so yes you can get better Dot 4 and Dot 5.1 products. Doesn't mean that Dot 4 is better than Dot 5.

If you are changing the fluid, you want to get every last bit of old fluid out as this can contaminate the system and undo all the good work. People have changed their fluid only to find they still get fade and fluid boiling because they didn't push the callipers back in so that all the old fluid is changed. The result is old fluid that boils and still causes a problem.

I've been using Comma Dot 5.1 for years. No probs.

Steve
www.tvrbooks.co.uk

[roulli]

quote:

If you are changing the fluid, you want to get every last bit of old fluid out as this can contaminate the system and undo all the good work. People have changed their fluid only to find they still get fade and fluid boiling because they didn't push the callipers back in so that all the old fluid is changed. The result is old fluid that boils and still causes a problem.

I've been using Comma Dot 5.1 for years. No probs.

Steve
www.tvrbooks.co.uk

Thanks for this hint, Steve.
It's one of this things that sound evident, when one reads it, but I wonder if many people do it.

Patrick

[GreenV8s]

quote:

quote:

If you are changing the fluid, you want to get every last bit of old fluid out as this can contaminate the system and undo all the good work. People have changed their fluid only to find they still get fade and fluid boiling because they didn't push the callipers back in so that all the old fluid is changed. The result is old fluid that boils and still causes a problem.

I've been using Comma Dot 5.1 for years. No probs.

Steve
www.tvrbooks.co.uk

Thanks for this hint, Steve.
It's one of this things that sound evident, when one reads it, but I wonder if many people do it.

Patrick

Bleeding the brakes after fitting new pads takes care of this for you since the pistons will be pushed right back at that point. I do this as a matter of course. Interesting to see how horrible the first bit of fluid is that comes out, goes to show how heat in the caliper wrecks the fluid even if you didn't boil them, and even if it hasn't absorbed any water. Brakes feel *much* nicer afterwards!

Cheers,
Peter Humphries (and a green V8S)