Robster
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| posted on 17/8/04 at 04:00 PM |
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Front Caliper Piston Removal
I've read previous posts on the the subject & have tried to follow the cortina Haynes manual, but I just cannot get the pistons out of my
M16 calipers! Spent a couple of hours trying, fingers very sore, two of the four pistons have moved a bit, the other two not at all.
The Haynes manual & previous posts on here recommend connecting a foot pump; I cannot figure out how or where to connect it - I don't have
any adapters that will fit the brake pipe.
Any advice?
Ta,
Rob.
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liam.mccaffrey
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| posted on 17/8/04 at 04:14 PM |
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right i had the same problem a week ago
1. do you have a compressor, if yes go to 3
2. do you have a grease gun if yes go to 4
3. use a blow gun on the fluid inlet to blow out the piston with compressed air, i did have to have an adapter tube made up by an engineer though it
had 1/4"bsp on 1 end and M10x1mm on the other end this connected the caliper to a quick connect fitting, warning when they go they are bloody
loud, i nearly filled my pants!!
4. fit a grease nipple to the bleed valve and block up the fluid inlet with a M10 x 1mm pitch bolt and pump out the pistons using a grease gun you
will have to clamp one then the other
both methods work i have done them both, have you found a seal kit anywhere? i have had not luck as i am told my caliper is a non girling M16 and they
don't do seal kits for it.
liam
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albertz
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| posted on 17/8/04 at 06:36 PM |
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I had the same problem and in the end i re-used a short scrap brake pipe and connected it to the master cylinder and hand operated the cylinder, until
it popped out.
This is a nice, quick, easy and safe method - well it was for me anyway (maybe a bit messy).
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andyps
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| posted on 17/8/04 at 08:01 PM |
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quote:
Originally posted by albertz
I had the same problem and in the end i re-used a short scrap brake pipe and connected it to the master cylinder and hand operated the cylinder, until
it popped out.
This is a nice, quick, easy and safe method - well it was for me anyway (maybe a bit messy).
I've used this method in the past too - works well as you can free each cylinder in turn by clamping the others.
Andy
An expert is someone who knows more and more about less and less
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liam.mccaffrey
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| posted on 17/8/04 at 08:21 PM |
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got to say i agree with the guys, when i did it i just used what i had laying around the workshop, apart from the special turned down bit, after i did
that i found i had the correct fittings anyway
i didn't have any brake pipe or a master cylinder so i just made do 
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Robster
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| posted on 17/8/04 at 08:55 PM |
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Okay, cheers guys. I will try to find some spare brake pipe & connect up the old donor master cylinder. Only problem with that is, not sure what
condition the master cylinder is in or whether it still works...
Other than that I shall have to try to fabricate some connection for a footpump & do it that way.
Cheers,
Rob.
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givemethebighammer
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| posted on 17/8/04 at 09:38 PM |
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clamp the pistons you don't want to remove then use a foot pump with a plastic adapter used to pump up footballs, paddling pools etc (usually
comes with the pump). Force the end of the plastic adapter into the caliper brake pipe hole, hold it firmly in place and pump. Probably worth putting
a piece of wood in side the caliper to cushion the piston as it comes out. Watch your fingers the piston may come out at quite a speed \ force. Also
watch your eyes \ mouth as sometimes old brake fluid sprays everywhere as well.
good luck
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Robster
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| posted on 23/8/04 at 11:45 AM |
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Thanks for the help guys. Having eventually found the attachment for my footpump, it worked a treat!
And yes, the pistons come out with quite a force & a loud bang!!!
Liam, GTS Tuning, www.gtstuning.co.uk (sorry, don't know how to insert a link) do quite a lot of stuff, that is where I will probably order my
seal kit, but I have the standard M16 calipers.
You could also try brakes international - www.brakesint.co.uk.
Cheers,
Rob.
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mad4x4
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| posted on 23/8/04 at 03:16 PM |
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I took a standard bit of copper and flared on a "nipple and nut" to fit the caliper. I then clamped a "Beachball" inflator
nozzle onto the copper with a jubilee clip (hose clip) and attached this to a car wheel compressor. Switch on - take cover and POP.
Also used the same system for pressur testing my barke lines for leaks prior to bleeding. Got to 150PSI. no leaks
Scot's do it better in Kilts.
MK INDY's Don't Self Centre Regardless of MK Setting !
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