Anyone know the size of the little o ring between the two halves of a 4 pot grimeca caliper mine is oozing brake fluid from between the two halves

 Do you still have the disc guard on with the spacers? If not the bolts shoulder can be too long.

I still have the disk guard on I split caliper last week and o ring fell out now it's seeping is the a certain way to put oring as one side is flat one is rounded

Does anyone know if you can buy the small o rings from anywhere as brake is working just fluid seeping out of the split and I think air getting in there making brake soft

Does anyone know if you can buy the small o rings from anywhere as brake is working just fluid seeping out of the split and I think air getting in there making brake soft

 

I learned this the hard way.  Just bear in mind that the top mounting bolt also seals the one half of the caliper.  If you pump the brakes with the bolt removed, it will leak.

Mine is leaking when back together and on the bike it was OK went for a ride then next day brake was soft and I now notice a little bit of oil coming from the join between the 2 halves

OK thanks will look there do they do just the o ring as a separate part

only comes with the rest of the seal kit