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.
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HOMESERVICE MANUALSMERCURY2010MOUNTAINEER 2WD V8-4.6LREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER HEAD ASSEMBLY
2010 Mercury Mountaineer 2WD V8-4.6L
Cylinder Head Assembly
2010 Mercury Mountaineer 2WD V8-4.6LSECTION Cylinder Head Assembly
Cylinder Head
Tighten the 10 LH cylinder head bolts in 6 stages, in the sequence shown.
Stage 1: Tighten to 40 Nm (30 lb-ft).
Stage 2: Tighten an additional 90 degrees.
Stage 3: Loosen all 10 bolts a minimum of one full turn (360 degrees).
Stage 4: Tighten to 40 Nm (30 lb-ft).
Stage 5: Tighten an additional 90 degrees.
Stage 6: Tighten an additional 90 degrees.
Tighten the 10 RH cylinder head bolts in 6 stages, in the sequence shown.
Stage 1: Tighten to 40 Nm (30 lb-ft).
Stage 2: Tighten an additional 90 degrees.
Stage 3: Loosen all 10 bolts a minimum of one full turn (360 degrees).
Stage 4: Tighten to 40 Nm (30 lb-ft).
Stage 5: Tighten an additional 90 degrees.
Stage 6: Tighten an additional 90 degrees.
Bolt re-usability
NOTE: The cylinder head bolts must be discarded and new bolts installed. They are a tighten-to-yield design and cannot be reused.
Surface Variation -- Head-to-block, Head-to-manifolds And Surface Variation -- Warpage
a The pin bore and crank bearing bore must be parallel and in the same vertical plane within the specified total difference when measured at the ends of a 203 mm bar, 105.5 mm on each side of rod centerline.
Camshaft Bearing Cap
Tighten to 10 Nm (89 lb-in) in the sequence shown.
Intake Manifold Specifications
Exhaust Manifold Specifications
Camshaft Gear/Sprocket Specifications
Tighten the 10 LH cylinder head bolts in 6 stages, in the sequence shown.
Stage 1: Tighten to 40 Nm (30 lb-ft).
Stage 2: Tighten an additional 90 degrees.
Stage 3: Loosen all 10 bolts a minimum of one full turn (360 degrees).
Stage 4: Tighten to 40 Nm (30 lb-ft).
Stage 5: Tighten an additional 90 degrees.
Stage 6: Tighten an additional 90 degrees.
Tighten the 10 RH cylinder head bolts in 6 stages, in the sequence shown.
Stage 1: Tighten to 40 Nm (30 lb-ft).
Stage 2: Tighten an additional 90 degrees.
Stage 3: Loosen all 10 bolts a minimum of one full turn (360 degrees).
Stage 4: Tighten to 40 Nm (30 lb-ft).
Stage 5: Tighten an additional 90 degrees.
Stage 6: Tighten an additional 90 degrees.
Bolt re-usability
NOTE: The cylinder head bolts must be discarded and new bolts installed. They are a tighten-to-yield design and cannot be reused.
Surface Variation -- Head-to-block, Head-to-manifolds And Surface Variation -- Warpage
a The pin bore and crank bearing bore must be parallel and in the same vertical plane within the specified total difference when measured at the ends of a 203 mm bar, 105.5 mm on each side of rod centerline.
Camshaft Bearing Cap
Tighten to 10 Nm (89 lb-in) in the sequence shown.
Intake Manifold Specifications
Exhaust Manifold Specifications
Camshaft Gear/Sprocket Specifications
RENDER: 1.0x
NO RELATED
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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.