You've got a bad caliper, maybe two if the "drag" on the left one is
heavy. Old, swollen hoses can cause this too, but you said you replaced
There should be just a slight scrape as you spin the wheel by hand.
Bores and pistons must be perfect, since it is only the stretch of the
rubber seal that pulls the pistons back a few thou after braking.
Corrosion or poor tolerances will hold the pistons against the rotor,
and heat from this rubbing can increase the pressure to the point of
I hope they are under warranty!
'84 Vanagon Westfalia w/2.1
'65 MGB (Daily driver since 1969)
'74 MGB GT (Restoring sloooowly)
Assisting on Restoration (and spending OPM):
'72 MGB GT (Daughter's)
'64 MGB (Son's)
Stripped and gone but their parts live on:
'68 MGB, '73 MGB, '67 MGB GT