Mazda B-Series 1997 Workshop Manual page 345

E3
ENGINE BLOCK HEATER
Removal Note
Block heater cable
Use door trim panel removing tool or equivalent to remove
wiring from battery tray, inner fender, engine mount brackets
and cylinder block.
6BUOE3-016
Block heater
1
.
Note position that element is pointed (e.g., 6 o'clock, 12
o'clock) when removing heater.
2. Clean inside diameter of core plug hole machined surface
and hole entrance. Remove any burrs at hole entrance to
avoid damage to O-ring.
3. Cover rubber O-ring with a liberal coating of premium
long-life grease or equivalent.
6BUOE3-017
Installation Note
Block heater
Insert heater in core plug hole in same position as it was
removed and tighten.
Tightening torque:
1.6-1.8
N - m (16-18 kgf-em, 14-16 in.Ibf)
6BUOE3-018