Exclamation Mark under hard acceleration?

[-ollie-]

Originally Posted by Adrian E

if it wasn't topped right up when last changed and the brakes were fairly new it may mean pads are now getting more worn too?

What side of London are you, by the way?

Pads have lots of life left in them Adrian, had a look over myself today.

I'm North London, near Muswell Hill

[ainarssems]

Should say on the lid of the reservoir what type to use - best not to mix types

It' not like oil which you cannot mix. Because its a part of essential safety system brake fluid manufactures have to keep to certain standards and you can put in or top up with higher spec brake fluid. I think specified is DOT4 ( at least on PF) but you can put in or top up with DOT5 or 5.1.

[Adrian E]

some fluid types are not compatible - brake fluids to different standards can destroy caliper seals if used in the wrong application.

Used to work with a Lucas Girling brake engineer who basically said unless you were going to a silicone based fluid to stick to precisely what the manufacturer specified to avoid the risk of incompatibility.

I'm sure you're correct at a practical level as the DOT5 on fluids are I think silicone based but I'd rather not take the chance.

[ainarssems]

It's just really old cars that cannot use modern brake fluids and has risk of damaging seals. Unless you have a classic car it will be at least DOT3 and you can put DOT4 or 5 in it.

[Nollywood]

Hydraulic fluids can be mixed fine. However, synthetic hydraulic fluid can't be mixed with regular.