Engine Specifications (Peugeot 406, 1995-2004)

cylinder head
Maximum non-flatness of mating surfaces:
– XU engines	0.05 mm
– XUD engines	0.07mm
Protrusion of the swirl chamber in diesel engines	0 - 0.03 mm
valves
Valve disc diameter
Inlet valve:
– gasoline engines:
• 1.6 liter engine	41.6 mm
• 1.8 liter engine	no data
• 2.0 liter engine	no data
– diesel engines:
• 1.9 liter engine	38.6 mm
• 2.1 liter engine	33.9 mm
Exhaust valve:
– gasoline engines:
• 1.6 liter engine	34.7 mm
• 1.8 liter engine	no data
• 2.0 liter engine	no data
– diesel engines:
• 1.9 liter engine	33.0 mm
• 2.1 liter engine	33.9 mm
Valve stem diameter
Inlet valve:
– gasoline engines:
• 1.6 liter engine	7.83 - 7.98 mm
• engine 1.8 and 2.0 liters	no data
– diesel engines:
• 1.9 liter engine	7.99 mm
• 2.1 liter engine	8.005 mm
Exhaust valve:
– gasoline engines:
• 1.6 liter engine	108.37 mm
• engine 1.8 and 2.0 liters	no data
– diesel engines:
• 1.9 liter engine	111.85 mm
• 2.1 liter engine	121.9 mm
Cylinder block
Cylinder diameter
Petrol engines:
– 1.6 liter engines:
• group A	83.000 – 83.010 mm
• group B	83.010 - 83.020 mm
• group C	83.020 – 83.030 mm
– 1.8 and 2.0 liter engines	no data
Diesel engines:
– 1.9 liter engines:
• nominal	83.000 - 83.018 mm
• increased R1	83.200 - 83.218 mm
• increased R2	83.500 - 83.518 mm
• increased R3	83.800 - 83.818 mm
– 2.1 liter engines:
• nominal	85.000 – 85.018 mm
• increased R1	85.030 - 85.048 mm
• increased R2	85.250 - 85.268 mm
• increased R3	85.600 - 85.618 mm
Protrusion of the liner above the cylinder block (only on engines with aluminum cylinder block):
Rated	0.03 - 0.10 mm
Maximum difference between any two cases	0.05 mm
Pistons
Piston diameter
Petrol engines:
– 1.6 liter engines:
• group A	82.960±0.007mm
• group B	82.970±0.007 mm
• group C	82.980±0.007mm
– 1.8 and 2.0 liter engines	no data
Diesel engines:
– 1.9 liter engines:
• nominal	82.930 - 82.939 mm
• 1st enlarged	83.130 - 83.139 mm
• 2nd enlarged	83.430 - 83.439 mm
• 3rd enlarged	83.730 - 83.739 mm
– 2.1 liter engines:
• nominal	84.920 - 84.929 mm
• 1st enlarged	84.950 - 84.959 mm
• 2nd enlarged	85.170 - 85.179 mm
• 3rd enlarged	85.520 - 85.529 mm
Crankshaft
Axial play	0.07 - 0.32 mm
Main bearing journal diameter
Petrol engines:
– 1.6 liter engine:
• nominal	59.981 – 60.000 mm
• decreased	59.681 - 59.700 mm
– 1.8 and 2.0 liter engines	no data
Diesel engines:
- nominal	60.0 + 0 - 0.019 mm
- decreased	59.7 + 0 - 0.019 mm
Connecting rod journal diameter
Petrol engines:
– 1.6 liter engine:
• nominal	49.984 – 50.000 mm
• decreased	49.684 - 49.700 mm
– 1.8 and 2.0 liter engines	no data
Diesel engines:
- nominal	50.0 + 0 - 0.016 mm
- decreased	49.7 + 0 - 0.016 mm
Working clearance of bearings
Petrol engines:
– 1.6 liter engine:	0.025 - 0.050 mm
– 1.8 and 2.0 liter engines	no data
Diesel engines	0.025 - 0.050 mm
Working clearance of connecting rod bearing (all models)	0.025 - 0.050 mm
Piston rings
Castle gaps
Petrol engines:
– top compression ring:
• 1.6 liter engines	0.4 - 0.6 mm
• 1.8 and 2.0 liter engines	0.3 - 0.5 mm
– middle compression ring:
• 1.6 liter engines	0.15 - 0.35 mm
• 1.8 and 2.0 liter engines	0.3 - 0.5 mm
- lower oil scraper ring	0.3 - 0.5 mm
Diesel engines:
- top and middle compression rings	0.20 - 0.40 mm
- oil scraper ring	0.25 - 0.50 mm

Engine Specifications (Peugeot 406)