Technical characteristics of diesel engines (Peugeot 406)

General information
Designation:
– 1.9 liters (engine 1905 cm³)	XUD9
– 2.1 liters (2088 cm³ engine)	XUD11
Engine codes*:
– 1.9 liter engine	DHX (XUD9BTF/Y/L3)
– 2.1 liter engine	P8C (XUD11BTE/Y/L/L3)
Cylinder diameter:
– 1.9 liter engine	83.00 mm
– 2.1 liter engine	85.00 mm
Piston stroke:
– 1.9 liter engine	88.00 mm
– 2.1 liter engine	92, 00 mm
Direction of rotation of the crankshaft	Clockwise when viewed from the right side of the car
Cylinder No.1	Located on the flywheel side
Compression ratio:
– 1.9 liter engine	21,8:1
– 2.1 liter engine	21,5: 1
Compression pressure (hot engine)
Normal	25 – 30 bar
Minimum	18 bar
Maximum difference between any two cylinders	5 bar
Camshaft
Camshaft drive	With a toothed belt
Number of support bearings:
– 1.9 liter engine	3
– 2.1 liter engine	5
Axial clearance:
– 1.9 liter engine	0.07 – 0.16 mm
– 2.1 liter engine	no data
Valve clearances (1.9 liter engine)
Intake valves	0.15±0.08 mm
Exhaust valves	0.30±0.08 mm
Lubrication system
Oil pump drive	Chain from the sprocket on the right end of the crankshaft
Minimum oil pressure at 90°C	4.9 bar at 4000 rpm
Pressure sensor response pressure	0.8 bar

* The engine code is stamped on the front of the engine block

Tightening torques, Nm

Engines 1.9 liters
Connecting rod lower head bearing cap mounting bolts:
- stage 1	20
- stage 2	Turn to an angle of 70°
Camshaft Bearing Cap Fastening Bolts	20
Camshaft pulley mounting bolt	40
Crankshaft pulley mounting bolt:
- stage 1	40
- stage 2	Turn to an angle of 51°
Front Crankshaft Seal Cover	16
Cylinder head mounting bolts:
- stage 1	20
- stage 2	60
- stage 3	Turn to an angle of 220°
Cylinder head cover bolts	10
Flywheel mounting bolts	50
Fuel pump cover mounting screws	10
Fuel pump pulley mounting nut	50
Left powertrain suspension:
- suspension mounts to the body	30
- bolts for fastening the rubber cushion to the suspension	30
– fastening the rack to the gearbox	60
- central nut	65
Fastening the intermediate bearing housing	50
Crankshaft bearing cover mounting bolts:
- stage 1	15
- stage 2	Turn to an angle of 60°
Oil pump mounting bolts	13
Bolts for fastening the oil spray pipe to the pistons	10
Right powertrain suspension:
- fastening the suspension to the engine	45
- nut for fastening the rubber cushion to the support	45
- nut for fastening the rubber cushion to the body	40
– upper travel limiter mounting bolts	50
Oil pan mounting bolts	16
Timing Belt Cover Fastening Bolts	8
Fastening the timing belt tension adjustment mechanism	20
Fastening the timing belt tensioner mechanism	20
2.1 liter engines
Connecting rod lower head bearing cap mounting bolts:
- stage 1	20
- stage 2	Turn to an angle of 70°
Camshaft pulley mounting bolt	50
Front crankshaft seal housing mounting bolts	16
Crankshaft pulley mounting bolt:
- stage 1	40
- stage 2	Turn to an angle of 60°
Cylinder head cover	8
Cylinder head mounting bolts:
- stage 1	70
- stage 2	Turn to an angle of 50°
Warm up the engine, cool for 3-5 hours, loosen the bolts, then retighten:
- stage 3	70
- stage 4	Turn to an angle of 150°
Flywheel mounting bolts	50
Fuel pump cover mounting bolts	10
Fuel pump pulley mounting nut	50
Left powertrain suspension:
- suspension mounts to the body	30
- bolts for fastening the rubber cushion to the suspension	30
– fastening the rack to the gearbox	60
- central nut	65
Fastening the intermediate bearing housing	50
Crankshaft bearing cover mounting bolts:
- stage 1	15
- stage 2	Turn to an angle of 60°
Oil pump mounting bolts	13
Bolts for fastening the oil spray pipe to the pistons	10
Right powertrain suspension:
- fastening the suspension to the engine	45
- nut for fastening the rubber cushion to the support	45
- nut for fastening the rubber cushion to the body	40
– upper travel limiter mounting bolts	50
Oil pan mounting bolts	16
Timing Belt Idler Pulley	37
Fastening the timing belt tensioner mechanism	10