Skylark L4-138 2.3L DOHC VIN D MFI QUAD 4 (1989)
Brake Caliper: Testing and Inspection
Honing caliper piston bore
If the caliper is cracked or fluid leakage through the casting is evident, the caliper must be replaced as a unit.
Should it become necessary to remove the caliper for installation of new parts, clean all parts in alcohol, wipe dry using lint free cloths, using an
air hose to blow out drilled passages and bores. Check dust boots for punctures or tears. If punctures or tears are evident, new boots should be
installed upon reassembly.
Inspect piston bores in both housings for scoring or pitting. Bores that show light scratches or corrosion can usually be cleaned with crocus cloth.
However, bores that have deep scratches or scoring may be honed, provided the diameter of the bore is not increased more than .002 inches.
If the bore does not clean up within this specification, a new caliper housing should be installed (black stains on the bore walls are caused by
piston seals and will do no harm).
When using a hone be sure to install the hone baffle before honing bore. The baffle is used to protect the hone stones from damage. Use extreme
care in cleaning the caliper after honing. Remove all dust and grit by flushing the caliper with alcohol. Wipe dry with clean lint free cloth and then
clean a second time in the same manner.
