Other Stuff > Tricks & Tips
Freeing stuck brake pistons with basic tools and no mess!
K2-K6:
They can be really well stuck from that corrosion around the seal.
The rears on many VAG cars are usually aluminium caliper and very similar bore to our Honda type, with a seal boot to cover piston. If that seal is compromised though the corrosion builds such that you can't turn them at all, even with proprietary tool engaged.
The mechanical handbrake is concentric with the hydraulic piston too, and can sometime not be operational even pulling the lever hard. The only way to get them out is to pump them with footbrake, then they creek and groan like an old wooden boat in protest as they move. It's literally just the corrosion around the seal holding them, once cleaned and refitted they are fine again.
andy120t:
--- Quote from: DomP on January 31, 2024, 06:46:38 PM ---I used a method an old American bloke uses on his XS650 on YouTube, same principal but using a large nut and bolt wound out inside the piston, stick an open ended spanner over the bolt then a bar through the ring end to twist while pulling up gradually. Photos might help with this description 😀
--- End quote ---
I think I can picture that - I'll try on the rear stuck piston/ caliper...I think that only has one piston! The great thing is, once something works I start to feel a bit more confident. These brakes had been really getting me down.
Athame57:
I watched the video, I did wonder if extending the leverage of that allen key with a hollow tube, a handle bar perhaps, would have made it less stubborn though?
Moorey:
For less than a tenner on Aliexpress you can buy a complete front master cylinder with lever and a hose. Just pump it out whilst at your
bench without all the huffing and puffing. Save that for doing something else. When done just put it back in the drawer with all your other tools. I
bet he spends more on gloves.
And I am a Yorkshireman
andy120t:
Where's the warm feeling of satisfaction and achievement in that! (Whereas keeping a tenner in your wallet...now there's a fine feeling,).🙂
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