Hyundai i10 - Brakes - Doc

Hyundai i10 2010 Manual 1.2 Disc brakes all round.

I have a strange intermittent problem with the brakes.

When the car is left overnight, at first I experience a "long" pedal i.e. there is a larger than normal travel before any braking effect is felt. There is no spongy effect in the pedal and pumping does not change anything. After a few miles the brakes return to normal (they are quite powerful) There are no leaks.

I got my trusted indy to have a quick look, without dismantling, and they could find no fault. The occurrence is very intermittent; the brakes can work perfectly for many days without issue. Any ideas?

Hyundai i10 - Brakes - gordonbennet

This is only a guess, i have not seen how the parking brake system works on those.

It sounds like one or more of the pistons is retracting during several hours parked up, that isn't likely on the front brakes which really have no way of retracting assuming they are normal sliding single or opposed twin piston calipers.

My guess is that the rear calipers have ratchet type adjusters inside for the parking brake, i suspect you have to wind them back in to fit new shoes, i wonder if the adjuster isn't holding in place, has seized maybe.

If that is the problem, i wonder if someone has adjusted the parking brake cable up too much to compensate for this so now the adjuster can't ratchet anyway....as i say this is only a theory but might be worth looking at.

Hyundai i10 - Brakes - Doc

If that is the problem, i wonder if someone has adjusted the parking brake cable up too much to compensate for this so now the adjuster can't ratchet anyway....as i say this is only a theory but might be worth looking at.

There has been no work carried out on any part of the braking system, apart from two yearly change of fluid.

Hyundai i10 - Brakes - gordonbennet

There has been no work carried out on any part of the braking system, apart from two yearly change of fluid.

No (what should be) normal brake servicing?

Hyundai i10 - Brakes - Doc

There has been no work carried out on any part of the braking system, apart from two yearly change of fluid.

No (what should be) normal brake servicing?

Inspections only, in accordance with the service schedule. There has been no need for parts renewal.

Hyundai i10 - Brakes - Doc

Update:

The fault has been traced to a defective rear caliper.

Hyundai i10 - Brakes - slowdown avenue

always good to hear the outcome

 

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