Tightening Torque, Engine
Note. Screws coated with a locking fluid or self locking nuts must be replaced with new when reinstalled.
See the table below to find the tightening torques for components not included in the summary.
Nuts and screws which are not self locking can be reused provided that they are in good condition.
| Applies to screwed joint with strength class 8.8. | |
|---|---|
| Thread | Tightening torques (Nm) |
| M5 | 5 |
| M6 | 10 |
| M7 | 17 |
| M8 | 24 |
| M10 | 50 |
| M12 | 80 |
| M14 | 130 |
TIGHTENING TORQUE
Summary Of Tightening Torques For Specific Components
Note. Screws coated with locking fluid or sealant must always be replaced with new screws during reinstallation.
Always use new screws and nuts when angle tightening. Any exceptions to this rule will be indicated in the method.
Angle-tightening in tight spaces.
| Exhaust bend (to the turbocharger (TC)) | 24 Nm |
|---|---|
| Cylinder head Tighten the screws in sequence from the center and outwards. | Stage 1........20 Nm Stage 2........60 Nm Stage 3........130° |
| Manifold (cylinder head side) | 25 Nm |
| Sub-frame nut (lower torque rod) | Stage 1........65 Nm Stage 2........60° |
| Pipe screws (water heated crankcase ventilation.) | 26 Nm |
| Pipe screws (coolant pipe/turbocharger (TC)) | 26 Nm |
| Pipe screws (oil pressure line/turbocharger (TC)) | 18 Nm |
| Pipe screws (oil pressure line/engine block) | 38 Nm |
| Subframe screws (start on the left-hand side, then the right-hand side) | Stage 1........105 Nm Stage 2........120° |
| Intake manifold (joint upper/lower section) | 19 Nm |
| Intake manifold (cylinder head side) | 19 Nm |
| Centre screw for the timing belt | 25 Nm |
| Knock sensor (KS) | 20 Nm |
| Piston cooling valve (piston cooling oil duct) | 35 Nm |
| Timing gear pulley (camshafts without variable valve timing) | 20 Nm |
| Timing gear pulley (camshafts with variable valve timing) | 10 Nm |
| Carrier plate | Stage 1........45 Nm Stage 2........ angle-tighten 50° |
| Intermediate section Tighten the screws in sequence from the center and outwards. | Stage 1 M10........20 Nm Stage 2 M10........45 Nm Stage 3 M8........24 Nm Stage 4 M7........17 Nm Stage 5 M10........90° |
| Torque converter | 50 Nm |
| Engine mounting Right side (M10x35 to cylinder block) | Stage 1........35 Nm Stage 2........60° |
| Engine mounting Right side (M8x23 to cylinder block) | Stage 1........20 Nm Stage 2........60° |
| Right-hand engine pad for the subframe (Only applies to XC90) | Stage 1........120 Nm Stage 2........40° |
| Lower torque rod, gearbox screw | Stage 1........35 Nm Stage 2........40° |
| Lower torque rod, sub-frame nut | Stage 1........65 Nm Stage 2........60° |
| Oil filter (environmental filter) | 25 Nm |
| Oil trap | 15 Nm |
| Sump plug | 38 Nm |
| Oil pump (20 countersunk M6 Allen screws hold the pump housing together) | 6 Nm |
| Oil return line (turbocharger (TC)) | 12 Nm |
| Oil pressure switch | 50 Nm |
| Stud (at exhaust port, manifold, turbocharger (TC)) | 20 Nm |
| Plug (check hole for gauging valve clearance) | 20 Nm |
| Plug (gauge hole/crankshaft seal) | 38 Nm |
| Belt tensioner (mechanical belt tensioner) | 25 Nm |
| Tensioner pulley (lever mechanical belt tensioner) | 30 Nm |
| Flywheel | Stage 1........45 Nm Stage 2........65° |
| Vibration damper | Stage 1........35 Nm Stage 2........50° |
| Temperature sensor (coolant) | 22 Nm |
| Front timing cover | 12 Nm |
| Upper timing cover | 8 Nm |
| Pressure control valve (piston cooling oil duct) | 35 Nm |
| Turbocharger (TC) (to manifold) | 25 Nm |
| Spark plugs | 30 Nm |
| Crankshaft center nut | 300 Nm |
| Connecting rod cap | Stage 1........20 Nm Stage 2........90° |
| Variable valve timing/center screw | 120 Nm |
| Variable valve timing/center plug | 35 Nm |