Alfa Romeo Forums banner

1 - 9 of 9 Posts

·
Registered
Joined
·
183 Posts
Discussion Starter #1
I plan to rebuild the front calipers on my 79 Alfetta Sprint Veloce. Can anyone suggest difficulties to watch out for, specialized tools necessary, techniques that will help? Thank you very much in advance.

From Arlington, Virginia
(where its 15F -9C this morning)
8oclock
 

·
Registered
Joined
·
131 Posts
Nothing really specialised is needed. Make sure you thoroughly clean the outsides of the calipers BEFORE you even consider opening them up. The less crud that can get into the internals, the better. I use methylated spirits and small stiff bristle brushes to clean calipers, a toothbrush will work.
The big part of the job is ensuring everything is clean and to use Scotch brite on the pistons to clean them up. If there is ANY corrosion on the pistons where the seals run on the piston that won't come out with Scotch brite, replace them or have them rechromed.
I also like to use brake grease to re assemble everything (you need to coat the new seals) but plain brake fluid will also work just fine as a lubricant.

Regards, Andrew.
 

·
Registered
Joined
·
524 Posts
If you are going to completely redo the whole braking system, consider using silicone brake fluid (unless you are planning on doing track days with the car).
 

·
Registered
Joined
·
2,080 Posts
caliper rebuild special tools

You will need a 20 degree wedge, at least I think I remember it being a 20 degree wedge to orient the cut out of the piston correctly to the caliper.

I copied a factory tool but a chipboard, cereal box, or cardboard piece would work just fine for two calipers.
 

·
Administrator
Joined
·
17,371 Posts
You will need a 20 degree wedge, at least I think I remember it being a 20 degree wedge to orient the cut out of the piston correctly to the caliper.

I copied a factory tool but a chipboard, cereal box, or cardboard piece would work just fine for two calipers.
you can see the tool in use here:

Caliper Piston Alignment Tool

you can do it without splitting the caliper.
Also on IAP's tech page. There is a link to a .pdf template you can print out and glue to cardboard.

 

·
Registered
Joined
·
481 Posts
tip: use an air compressor and an air chuck to pop the pistons out real fast. put air chuck into the brake hose hole and squeeze the trigger. watch out-theyll launch out!
 

·
Registered
Joined
·
20 Posts
Another way to get the pistons out if air doesn't work is to use a grease gun. I drilled out an old bleeder and tapped it for a grease fitting. Never failed yet.
 

·
Registered
Joined
·
811 Posts
Put a rag or a bit of wood in between before you hit they with the air . And do not get a finger or a thumb in the way .:eek:

If only one wants to come out you will have to use a clamp to hold the lose one in to get the other out.

I always seem to find one stuck . Use a big C clamp to push it in just a bit then air to get it out . Repeat as required .
 
1 - 9 of 9 Posts
Top