engine

Cylinder Head R&R Torque Specs

for 2012 Mercedes-Benz ML350 W166 3.5L V6 M276 · AWD

Units

22 fasteners

Seq

Component

Torque

Angle

—

Cam Adjuster Solenoid

Replace O-ring when reinstalling.

9 lb-ft · 12 Nm

—

Camshaft Bearing Cap Bolts

Critical

Tighten in sequence, 3 passes

10 lb-ft · 14 Nm

—

Camshaft Bearing Caps

Critical

Tighten evenly in sequence to seat camshaft.

11 lb-ft · 15 Nm

—

Camshaft Cap Bolts

Critical

Tighten in sequence from center outward, multiple passes

10 lb-ft · 14 Nm

—

Camshaft Sprocket Bolt

Critical

Hold cam with wrench on hex

59 lb-ft · 80 Nm

—

Cover Bolts

14 lb-ft · 19 Nm

—

Cylinder Head Bolts

Critical

TTY - tighten in sequence plus angle

48 lb-ft · 65 Nm

—

Cylinder Head Bolts (M11)

Critical

REPLACE BOLTS. Step 1: 15 lb-ft. Step 2: +90°. Step 3: +90°. Tighten in sequence from center outward.

15 lb-ft · 20 Nm

90°

—

Exhaust Manifold Nuts

Critical

Apply anti-seize, work hot-to-cold

22 lb-ft · 30 Nm

—

Gasket Bolts

Critical

17 lb-ft · 23 Nm

—

Intake Manifold Bolts

Critical

18 lb-ft · 25 Nm

—

Mounting Bolts

23 lb-ft · 31 Nm

—

Mounting Bolts

Critical

40 lb-ft · 55 Nm

—

Oil Drain Plug

Critical

Use new crush washer

26 lb-ft · 35 Nm

—

Rocker Arm Bolts

Critical

Tighten with cam lobe pointing away

22 lb-ft · 30 Nm

—

Rocker Arm Shaft Bolts

Critical

Tighten evenly in sequence

18 lb-ft · 25 Nm

—

Sensor Bolts

9 lb-ft · 12 Nm

—

Thermostat Housing Bolts

11 lb-ft · 15 Nm

—

Timing Chain Guide Bolts

Critical

Replace if worn

9 lb-ft · 12 Nm

—

Timing Chain Tensioner Bolt

Critical

Install with pin/clip to compress

18 lb-ft · 25 Nm

—

Timing Cover Bolts - 8mm

Critical

Tighten in sequence

18 lb-ft · 25 Nm

—

Valve Cover Bolts

Tighten in sequence

7 lb-ft · 10 Nm

—

2012 MERCEDES-BENZ ML350 W166

22 fasteners