Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2007 Mazda B2300 L4-2.3LFACTORY OEM SERVICE PROCEDURE
System Specifications
Cylinder head
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 ).
Intake Manifold
Camshaft Bearing Cap
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.)
Exhaust Manifold
Tightening Torque 54 Nm (5.51 kgf-m, 40 ft. lbs.)
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 ).
Intake Manifold
Camshaft Bearing Cap
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.)
Exhaust Manifold
Tightening Torque 54 Nm (5.51 kgf-m, 40 ft. lbs.)
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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