Mazda 1.5 / 1.6 DOHC Cylinder Head Protege Cast# ZL01

Machine Work Performed:

- Complete disassembly and thorough cleaning via hot tank & pressure tested to confirm casting integrity

- New valve seats installed as necessary

- New valve stem seals installed on all our heads & all valve guides are replaced with new ones as necessary.

- Valve job Performed with all required angles & vacuum tested seals to ensure perfect compression.

- PCD milled to ensure a super smooth finish. (PCD stands for Polycrystalline Diamond, and is best for aluminum heads).

- CBN milled to ensure a super smooth finish. (CBN stands for Cubic Boron Nitride and is best for cast-iron heads).

- All necessary parts are cleaned and inspected before final assembly to meet AERA specifications.