• Hi Guest!
    If you appreciate British Car Forum and our 25 years of supporting British car enthusiasts with technical and anicdotal information, collected from our thousands of great members, please support us with a low-cost subscription. You can become a supporting member for less than the dues of most car clubs.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

Midget caliper piston positions

Share this page

D

dave99

Freshman Member
Country flag
Offline
Hi all, I am in the process of rebuilding the front calipers on my 79 Midget. Before I removed the pistons I marked them as they were installed. Comparing the recessed part of the piston, neither caliper has the pistons in the same position. Is there a particular position they should be in? Does it even matter if both recesses are lined up?

Dave
 
Dave, the book shows that the cutaway portion of the piston is downwards, away from the bleed screw. But, I think that the last few sets of new pistons I've installed weren't cut away at all. Go figure.
Jeff
 
Depending on which paragraph you read in the factory manual, if you remove and repace the caliper the recessed part goes down, and if you overhaul the caliper the recess goes up toward the bleed screw. No clear answer that I have found.

Even my local MG shop here was not totally sure, so I went with what we found in the MGB factory manual. It had a very clear diagram where the recessed portion is centered between the caliper mounting holes. So that's what I did.

Dave
 
Dave, I just looked at two sets of calipers, plus an old set of pistons, and none of the pistons are recessed. So, I guess it's at your discretion.
'Jeff
 
Back
Top