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BigAl P4
Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey
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The Wombat Alfa Sprint
Joined: 31 Aug 2012 Posts: 168 Location: Deepest darkest Huntingdonshire
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Posted: Sun Nov 04, 2012 7:42 pm Post subject: |
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I think it should be possible to service the caliper yourself. I think service kits are still available and will include the piston seal, dust covers etc.
How this goes and how successful it turns out would depend on what you find when you have stripped the caliper down. If the cylinder sides that the piston goes into are scored, or corroded past where the seal stops, it might be best to get a used one known to be good or a new one.
Hope that helps with an idea or two _________________ Drivers:
- Green Fiat 20VT Coupe
- Champagne 155 V6
- Winter Freelander
- Mrs Wombats Freelander
Projects:
- Various 33s
- Some 155s
Hibernating for 2015
- 75 3.0 Cloverleaf
- 155 Q4 Winny
- Red 33 16v |
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BigAl P4
Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey
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Posted: Sun Nov 04, 2012 8:03 pm Post subject: |
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I've seen the kits and cylinders, could prob get a 2nd hand caliper for cheaper than it costs to fix.
I initially thought the imbalance was due to seized sliders, so when I got the wheel off and checked them to find they moved, I took them off only to find the above. One slide pin was a bit gammy, I cleaned that out and re-lubed it, even though the pads were not seized I also wire brushed all sliding parts, scrapped the parts the bruch couldn’t reach and re-lubed them.
The piston looked like it had some black residue on it, it didn't look corroded but I was running out of time so I didn’t have time to fully inspect it. I didn’t try pushing it as I didn’t want to push dirt past the seal and into the calliper. _________________ x2 33 16v
pictures http://www.alfa-pages.co.uk/viewtopic.php?t=5203 |
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The Wombat Alfa Sprint
Joined: 31 Aug 2012 Posts: 168 Location: Deepest darkest Huntingdonshire
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Posted: Sun Nov 04, 2012 8:12 pm Post subject: |
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Yep, sounds feasible that a service kit would be more than a used caliper
Would be good to know if the piston does move freely, so a good clean and blast with brake cleaner, particularly around the piston edge should make sure no dirt gets done there.
From what you have done, i would guess either the piston is getting sticky, or perhaps a little air trapped in the caliper so not getting good piston movement.
Would it be worth bleeding the system to be sure no air on that caliper? Just a thought. _________________ Drivers:
- Green Fiat 20VT Coupe
- Champagne 155 V6
- Winter Freelander
- Mrs Wombats Freelander
Projects:
- Various 33s
- Some 155s
Hibernating for 2015
- 75 3.0 Cloverleaf
- 155 Q4 Winny
- Red 33 16v |
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BigAl P4
Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey
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Posted: Sun Nov 04, 2012 8:19 pm Post subject: |
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I will see if I can get a dust shield locally easily before I start. I will then remove the old shield, clean the piston and check if it’s fixable.
What ever has happened has caused the pads to wear prematurely and the piston is nearly fully out. _________________ x2 33 16v
pictures http://www.alfa-pages.co.uk/viewtopic.php?t=5203 |
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The Wombat Alfa Sprint
Joined: 31 Aug 2012 Posts: 168 Location: Deepest darkest Huntingdonshire
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Posted: Sun Nov 04, 2012 8:30 pm Post subject: |
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That does sound like the piston is seized. Enough pressure to push it out, but too tight in the cylinder for it to return in the natural way (reduced hydraulic pressure and disc throwing it off). That would give the premature pad wear.
Hopefully, with the dust cover broken, it will be dirt or a little corrosion stopping it returning. Worst case would be the cylinder surface or piston itself is damaged.
Sounds like you have a good plan _________________ Drivers:
- Green Fiat 20VT Coupe
- Champagne 155 V6
- Winter Freelander
- Mrs Wombats Freelander
Projects:
- Various 33s
- Some 155s
Hibernating for 2015
- 75 3.0 Cloverleaf
- 155 Q4 Winny
- Red 33 16v |
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BigAl P4
Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey
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33bits 16 Valve
Joined: 23 May 2009 Posts: 1067 Location: Clevedon. North Somerset
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Posted: Thu Nov 22, 2012 11:20 pm Post subject: |
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Hopefully the callipers i've sent you Al will solve youre prob. _________________ 155 sportpack
33 16v Sportwagon
33 Permanent 4
33 16v (for sale)
156 JTS sportwagon
contact me for any 33 parts. Alex, 07896-327708
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lee16v 16 Valve
Joined: 29 Jun 2005 Posts: 1429 Location: Devon, UK
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Posted: Fri Nov 23, 2012 12:53 am Post subject: |
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I think sending Al some calipers is a long way off solving his problems Alex!! |
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BigAl P4
Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey
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lee16v 16 Valve
Joined: 29 Jun 2005 Posts: 1429 Location: Devon, UK
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Posted: Fri Nov 23, 2012 1:40 am Post subject: |
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BigAl wrote: |
What are my problems then Lee? |
Where to begin......................
Only joking dude.
On a different note, How far off are you getting this beast on a track? |
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Ian M Green Cloverleaf
Joined: 13 Mar 2003 Posts: 911 Location: Bath Somerset
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Posted: Fri Nov 23, 2012 11:31 am Post subject: |
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Lee, stop being nasty to Al...............
Thats my job _________________ Presntly own
Red Abarth 500c |
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BigAl P4
Joined: 06 May 2003 Posts: 2990 Location: U.K Surrey
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Ian M Green Cloverleaf
Joined: 13 Mar 2003 Posts: 911 Location: Bath Somerset
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Posted: Sat Nov 24, 2012 3:37 pm Post subject: |
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Excuses!!
Theres no reason not to take it on track now.
Its got 4 wheels, an engine, seats to sit on and brakes to stop it.
Why do you need all that other stuff?
Get on track and have some fun before your too old.
You dont have to be the most sorted, or fastest car there, you can have as much fun in a standard car as I have proved on a few occasions.
_________________ Presntly own
Red Abarth 500c |
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