Nissan CD20

Nissan CD20The Nissan CD20 is a 2.0 l (1,974 cc, 120.45 straight four, water-cooled naturally aspirated diesel engine from Nissan CD family. The engine was used on Nissan mid-size models from 1991 to 2000

The CD20 has a cast-iron cylinder block, an aluminum cylinder head with SOHC (Single overhead camshaft) with two valves per cylinder.

The Nissan CD20 compression ratio is 22.2:1. Cylinder bore and piston stroke are 84.5 mm (3.33 in) and 88.0 mm (3.46 in), respectively. The CD20 produced 75 PS (55 kW; 74 HP) at 4,500 rpm of horsepower and 132 Nm (13.5 kg⋅m, 97 lb⋅ft) at 2,800 rpm of torque.

The breakdown of the engine code is as follows:

  • CD – Engine Family
  • 20 – 2.0 Liter Displacement

General information

Engine Specifications
Engine codeCD20
LayoutStraight-4, vertical
Fuel typeDiesel
Displacement2.0L, 1,974 cc (120.45 cu in)
Injection pumpFuel injection pump
Power addernone
Max. Horsepower105 PS (77 kW; 103 HP) at 6,000 rpm
Torque output132 N⋅m (13.5 kg⋅m, 97 lb⋅ft) at 2,800 rpm
Firing order1-3-4-2
Dimensions (L x H x W):
Weight180.0 kg (396.8 lbs)

Cylinder block

The Nissan CD20 motor has a cast-iron cylinder block with five-bearings supported system and an aluminum alloy piston for high strength, lightweight and good heat conductivity; three compression and two oil control rings. The cylinder bore is 84.5 mm (3.33 in), piston stroke is 88.0 mm (3.46 in) and compression ratio rating is 22.2:1.

Cylinder block
Cylinder block alloyCast iron
Compression ratio:22.2:1
Cylinder bore:84.5 mm (3.329 in)
Piston stroke:88.0 mm (3.465 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:5
Cylinder inner diameter:84.500-54.510 mm (3.3268-3.3272 in)
Piston skirt diameter84.465-84.475 mm (3.3254-3.3258 in)
Piston ring side clearance:Top0.060-0.095 mm (0.0024-0.0037 in)
Second0.040-0.075 mm (0.0016-0.0030 in)
Oil0.030-0.070 mm (0.0012-0.0028 in)
Piston ring end gap:Top0.20-0.30 mm (0.0079-0.0118 in)
Second0.38-0.53 mm (0.0150-0.0209 in)
Oil0.30-0.55 mm (0.0118-0.0217 in)
Piston pin outer diameter24.994-25.000 mm (0.9840-0.9843 in)
Piston pin hole diameter24.991-24.999 mm (0.9839-0.9842 in)
Crankshaft main journal diameter:52.967-52.975 mm (2.0853-2.0856 in)
Crankpin diameter:49.968-49.974 mm (1.9672-1.9675 in)
Crankshaft center distance:44.000 mm (1.7322 in)

Main bearing cap bolts tightening procedure and torque specs:

  • 76-78 Nm; 7.8-8.0 kg·m; 56-58 ft·lb

After securing bearing cap bolts, make sure crankshaft turns smoothly by hand.

Connecting rod bearing nut

  • Step 1: 14-16 Nm; 1.4-1.6 kg·m; 10-11 ft·lb
  • Step 2: Turn nuts 60-65° or 37-45 Nm; 3.8-4.6 kg·m; 27-33 ft·lb

Crankshaft pulley

  • 142-152 Nm; 14.5-15.5 kg·m; 105-112 ft·lb

Flywheel fixing bolts

  • 83-93 Nm; 8.5-9.5 kg·m; 61-69 ft·lb

Cylinder head

The engine has SOHC design with a single camshaft and two valves per cylinder. The camshaft is driven from the crankshaft by a timing belt, the injection pump is also driven by a belt. Intake valves are 39 mm (1.53 in) in diameter, and the exhaust valves are 32 mm (1.26 in). The CD20 engine uses two valve springs. For engines of different production years, the cylinder heads could be different.

Cylinder head (Almera N15 specs)
Block head alloyAluminium
Valve Arrangement:SOHC, belt drive
Valves:8 (2 valves per cylinder)
Valve head diameter:INTAKE39.0-39.3 mm (1.535-1.547 in)
EXHAUST32.0-32.3 mm (1.260-1.272 in)
Valve length:INTAKE100.53-100.97 mm (3.9579-3.9752 in)
EXHAUST100.38-100.82 mm (3.9520-3.9693 in)
Valve stem diameter:INTAKE6.965-6.980 mm (0.2742-0.2748 in)
EXHAUST6.945-6.960 mm (0.2734-0.2740 in)
Valve spring free length:INTAKE Inner: 43.2 mm (1.701 in)
Outer: 38.2 mm (1.504 in)
EXHAUST Inner: 43.2 mm (1.701 in)
Outer: 38.2 mm (1.504 in)
Camshaft cam height:INTAKE49.20-49.25 mm (1.9370-1.9390 in)
EXHAUST49.15-49.20 mm (1.9350-1.9370 in)
Camshaft journal diameter:29.935-29.955 mm (1.1785 – 1.1793 in)

Head tightening procedure and torque specs:

  • Step 1: 39 Nm; 4.0 kg·m; 29 ft·lb
  • Step 2: 83-93 Nm; 8.5-9.5 kg·m; 61-68 ft·lb
  • Step 3: Turn all bolts 180-190°
  • Step 4: Loosen all bolts completely
  • Step 5: 39 Nm; 4.0 kg·m; 29 ft·lb
  • Step 6: Turn all bolts 75-80°

Camshaft-bracket nuts

  • 18-22 Nm; 1.8-2.2 kg·m; 13-16 ft·lb

Cramshaft sprocket

  • Front: 87-107 Nm; 8.9-10.9 kg·m; 64-79 ft·lb
  • Rear: 87-107 Nm; 8.9-10.9 kg·m; 64-79 ft·lb

Injection pump sprocket

  • 59-69 Nm; 6.0-7.0 kg·m; 43-51 ft·lb

Maintenance data

Valve clearance (HOT)
Intake valve0.25-0.35 mm (0.010-0.014 in)
Exhaust valve0.39-0.049 mm (0.015-0.019 in)
Compression pressure
Standard32 kg/cm2 (31.4 bar, 455 psi) / 200 rpm
Minimun25 kg/cm2 (24.5 bar, 356 psi) / 200 rpm
Compression differential limit between cylinders5 kg/cm2 (4.9 bar, 71 psi) / 200 rpm
Oil system
Recommended engine oilAPI-CD
SAE Viscosity Number For cold and warm areas: 10W-30
For hot areas: 20W-40 and 20W-50
Engine oil capacity With oil filter: 5.0 l
Without oil filter: 4.5 l

Vehicle applications

ModelYears Produced
Nissan Serena C231991–1993
Nissan Avenir Cargo W101990–1998
Nissan Sunny B141994–1998
Nissan Pulsar N151995–1999
Nissan Wingroad Y101996–1999
Nissan Almera N151995–2000
Nissan Primera P101992–1995
Nissan AD Y101997–1999
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