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So, the Vauxhall has been sitting for a long time - a very long time! and, I have been (had been) putting off rebuilding the calipers. Finally decided to take them apart. Went to Princess Auto (Like Harbor Freight) and bought a cheap air gun. Attached a hose, and, clamped hose at other end to bleeder screw (with bottom cut off so it is always open) - used it and the first set of pistons popped right out.
Second one not so much.
Took it to my mechanic, tried higher air pressure, tried heat, nothing.
Brought it home, hooked up the compressor again and, one side popped out (finally.) Second side remained stuck - and in deep as I had pushed it in to see if it moved (it did) Anyways, the good news is that it was the piston on the bleeder side that that was stuck, so, I could block off the hole to the other half and still be able to build up pressure.
Tried to make an actual brake circuit but, couldn't couldn't manage to get it to bleed properly (I suspect the heat had melted enough of the rubber to break the seal) so, borrowed a grease gun, back to Princess Auto, bought a grease gun hose, took the nipple end off, re-tapped it to fit the caliper, threaded it in and about half a dozen (very gentle) pumps with the gun and the piston eased right out, and, not as big a mess as you would think actually.
So, I am very very pleased and, for a total outlay of about $10 I have two tools, both very very handy for future caliper work.
hurray!
Second one not so much.
Took it to my mechanic, tried higher air pressure, tried heat, nothing.
Brought it home, hooked up the compressor again and, one side popped out (finally.) Second side remained stuck - and in deep as I had pushed it in to see if it moved (it did) Anyways, the good news is that it was the piston on the bleeder side that that was stuck, so, I could block off the hole to the other half and still be able to build up pressure.
Tried to make an actual brake circuit but, couldn't couldn't manage to get it to bleed properly (I suspect the heat had melted enough of the rubber to break the seal) so, borrowed a grease gun, back to Princess Auto, bought a grease gun hose, took the nipple end off, re-tapped it to fit the caliper, threaded it in and about half a dozen (very gentle) pumps with the gun and the piston eased right out, and, not as big a mess as you would think actually.
So, I am very very pleased and, for a total outlay of about $10 I have two tools, both very very handy for future caliper work.
hurray!
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