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indy-tech, Australia Car Mechanic
Category: Australia Car
Satisfied Customers: 7088
Experience:  All import and domestic car repairs and diagnostics
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Im trying to help my mate who has a 2007 corolla with spongy

Customer Question

im trying to help my mate who has a 2007 corolla with spongy brakes. he was trying to replace his rear brake pads and somehow the piston on the left rear popped out. so I managed to put it all back together. had to bleed it but now I have spongy brakes.
Submitted: 1 year ago.
Category: Australia Car
Expert:  indy-tech replied 1 year ago.

Check the caliper you repaired is there any leaks ??

Did the master cylinder run dry when the piston came out .


Customer: replied 1 year ago.
No leaks at the caliper and yes i think the master cylinder ran dry.
Expert:  indy-tech replied 1 year ago.

Okay you have to do a complete bleed though from rear to front .

Do this then get back to me .

If you did do all 4 then let me know where you started and where you finished off bleeding the system


Customer: replied 1 year ago.
all 4 calipers has been bled. When the motor is off brakes are hard but is spongy when turned on. Im tossing between master cylinder or brake booster.. not really sure.
Expert:  indy-tech replied 1 year ago.

Will not be the booster . Could be the master cylinder?

But first clamp the rear brake hose and then try the brakes if it stays hard then you still have air in the rear calpers .

if still soft clamp the right front , try then the left front . when clamping off the hoses and the pedal stays hard then after the

clamp is the problem .

If you had both rear calipers off the vehicle check that the bleed nipples are on the top and not the bottom ,if they are on the bottom

swap them over as they are on the wrong side .(So bleed nipples have to be on the top)

Bleed route: Rear left ,rear right ,front left , front right ..


Customer: replied 1 year ago.
Its working now i did bled all 4 calipers like i said. It was still soft but he calls me up and tells me its working fine after just driving it abit . Its a mystery .Thanks for your input and help.
Expert:  indy-tech replied 1 year ago.

Happy to be of service ,glad all worked out well .

Kindest regards Greg

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