2007 Mazda B2300 L4-2.3LFACTORY OEM SERVICE PROCEDURE

System Specifications

Cylinder head

Factory service manual diagram




Install the cylinder head and the new bolts. Tighten the bolts in the sequence shown in five stages.
Stage 1 Tighten to 5 Nm (44 inch lbs.).
Stage 2 Tighten to 15 Nm (11 ft. lbs.).
Stage 3 Tighten to 45 Nm (33 ft. lbs.).
Stage 4 Tighten an additional 90 degrees (1/4 turn).
Stage 5 Tighten an additional 90 degrees (1/4 turn ).


Factory service manual diagram




Intake Manifold


Camshaft Bearing Cap

Factory service manual diagram




Tighten the bolts in the sequence shown in three stages.
Stage 1 Tighten the camshaft bearing caps one turn at a time until tight.
Stage 2 Tighten the bolts to 7 Nm (62 inch lbs.)
Stage 3 Tighten the bolts to 16 Nm (12 ft. lbs.)


Crankshaft Pulley
Using the special tools to hold the crankshaft pulley in place, tighten the crankshaft pulley bolt in two stages.
Stage 1 Tighten to 100 Nm (74 ft. lbs.)
Stage 2 Rotate an additional 90 degrees (1/4 turn)


Flywheel or Flexplate

Factory service manual diagram




Tighten the bolts in the sequence shown in three stages.
Stage 1 Tighten to 50 Nm (37 ft. lbs.)
Stage 2 Tighten to 80 Nm (59 ft. lbs.)
Stage 3 Tighten to 112 Nm (83 ft. lbs.)


Oil Pump

Factory service manual diagram




Tighten the bolts in the sequence shown in two stages.
Stage 1 Tighten to 10 Nm (89 inch lbs.)
Stage 2 Tighten to 20 Nm (15 ft. lbs.)


Exhaust Manifold
Tightening Torque 54 Nm (5.51 kgf-m, 40 ft. lbs.)


Factory service manual diagram




Water Pump
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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