Nissan CD20T

Nissan CD20T turbo diesel engineThe Nissan CD20T is a 2.0 l (1,974 cc, 120.45 cu.in) straight four, water-cooled turbocharged diesel engine from Nissan CD family. The engine was used on Nissan mid-size models from 1991 to 2002.

The CD20T has a cast-iron cylinder block and an aluminum cylinder head with SOHC (Single overhead camshaft) with two valves per cylinder. The engine was equipped with a turbocharger, electronic fuel injection pump, and EGR system.

The Nissan CD20T 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 CD20T produced 91 PS (67 kW; 90 HP) at 4,400 rpm of horsepower and 174 Nm (17.7 kg⋅m, 128 lb⋅ft) at 2,400 rpm of torque.

The breakdown of the engine code is as follows:

  • CD – Engine Family
  • 20 – 2.0 Liter Displacement
  • T – Turbocharger

General information

Engine Specifications
Engine codeCD20T
LayoutStraight-4, vertical
Fuel typeDiesel
Production
Displacement2.0L, 1,974 cc (120.45 cu in)
Injection pumpElectronic fuel injection pump
Power adderTurbocharger
Max. Horsepower91 PS (67 kW; 90 HP) at 4,400 rpm
Torque output174 N⋅m (17.7 kg⋅m, 128 lb⋅ft) at 2,400 rpm
Firing order1-3-4-2
Dimensions (L x H x W):
Weight180.0 kg (396.8 lbs)

Cylinder block

The Nissan CD20T 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, piston stroke is 88.0 mm and the 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 diameter84.460-84.470 mm (3.3252-3.3256 in)
Piston ring side clearance:Top0.020-0.040 mm (0.0008-0.0016 in)
Second0.050-0.085 mm (0.0020-0.0033 in)
Oil0.030-0.070 mm (0.0012-0.0028 in)
Piston ring end gap:Top0.22-0.32 mm (0.0087-0.0126 in)
Second0.38-0.53 mm (0.0150-0.0209 in)
Oil0.30-0.55 mm (0.0118-0.0217 in)
Piston pin outer diameter27.994-28.000 mm (1.1021-1.1024 in)
Piston pin bore diameter28.025-28.038 mm (1.1033-1.1039 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)

Main bearing cap bolts tightening procedure and torque specs:

  • 69-78 Nm; 7.0-8.0 kg·m; 51-58 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 sprocket

  • 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 SOHV design with a single camshaft and two valves per cylinder. Intake valves are 39 mm in diameter, and the exhaust valves are 32 mm.

Cylinder head
Block head alloyAluminium
Valve Arrangement:SOHC, belt drive
Cylinder head height:137.9-138.1 mm (5.429-5.437 in)
Valves:8 (2 valves per cylinder)
Intake valve timing:232°
Exhaust valve timing:248°
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:INTAKE99.53-99.97 mm (3.9185-3.9358 in)
EXHAUST99.38-99.82 mm (3.9126-3.9299 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: 36.57 mm (1.4398 in)
Outer: 42.25 mm (1.6634 in)
EXHAUST Inner: 41.27 mm (1.6248 in)
Outer: 49.35 mm (1.9429 in)
Camshaft cam height:INTAKE48.70-48.75 mm (1.9173-1.9193 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: 31-37 Nm; 3.2-3.8 kg·m; 23-27 ft·lb
  • Step 2: Turn all bolts 180-190°
  • Step 3: Loosen all bolts completely
  • Step 4: 31-37 Nm; 3.2-3.8 kg·m; 23-27 ft·lb
  • Step 5: Turn all bolts 90-95°
  • Step 6: Turn all bolts another 90-95°

Camshaft-bracket nuts

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

Camshaft sprocket bolts

  • 87-107 Nm; 8.9-10.9 kg·m; 64-79 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 oilACEA B2-96 (CCMC-PD2)
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
Fuel system
Injection nozzle pressure130 kg/cm2 (127.5 bar, 1.849 psi)

Vehicle applications

ModelYears Produced
Nissan Avenir W101993–1998
Nissan Serena C231991–1996
Nissan Primera P11E 1996–2002
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