Bluebird T12 (1986-1991)

Specifications of all engines (Nissan Bluebird T12)

General characteristics

Engine type - 4-cylinder in-line with overhead camshaft, transversely mounted

Engine designation and volume	Code	Volume
1.6 liters	CA 16S	1598 cm³
1.8 liters with carburetor	CA 18NS	1796 cm³
1.8 liter turbocharged	CA 18ET	1809 cm³
2.0 liters with carburetor	CA 20S	1974 cm³
2.0 liter fuel injected	CA 20E	1974 cm³
2.0 liter diesel	LD 20	1952 cm³

Dimensions	Move	Diameter
CA 16S	78.0 mm	83.6 mm
CA 18NS	82.7 mm	83.6 mm
CA 18ET	83.0 mm	83.6 mm
CA 20S, CA 20E	84.5 mm	88.0 mm
LD 20	85.0 mm	86.0 mm

Compression ratio:

CA 16S (up to engine number 190258 - July 1987) — 9.0:1
CA 16S (from engine number 190259) and CA 18NS - 9.6:1
CA 18ET - 8.0:1
CA 20S, CA 20E - 9.4: 1
LD 20 — 21.3:1

Direction of crankshaft rotation - Clockwise (looking from the right side of the car)

Compression pressure (at engine speed, engine is hot):

Standard:

Turbo - 1177 kPa
All other models - 1196 kPa

Minimum:

Turbo - 883 kPa
All other models - 902 kPa

Maximum difference between cylinders is 98 kPa

Valve clearances

Inlet:

Engine hot - 0.30 mm
Engine cold (coolant temperature up to 20°C) — 0.21 mm

Outlet:

Engine hot - 0.30 mm
Engine cold (coolant temperature up to 20°C) — 0.23 mm

Valve springs

Standard clear height:

External - 49.98 mm
Internal - 44.10 mm

Camshaft

Bearing journal diameter:

Numbers 1-4 - 45.935-45.955 mm
Number 5 - 45.915-45.935 mm

Maximum clearance in bearing journals is 0.10 mm

Maximum camshaft clearance - 0.20 mm

Cam length:

CA 16S - 38.225-38.305 mm
CA 18NS - No information
SA 18ET - 38.391-38.471 mm
CA 20S:

Intake - 38.225-38.305 mm
Graduation - 38.391-38.471 mm

CA 20E - 38.819-38.899 mm

Maximum allowable wear is 0.20 mm

Cylinder head

Material - Light alloy

Max. permissible surface distortion under the gasket - 0.1 mm

Clearance between valve stem and guide:

Inlet - 0.020-0.053 mm
Exhaust - 0.040-0.073 mm

Wear limit - 0.1 mm

Valve bevel angle - 45°15' - 45°45'

Valve seat chamfer angle - 45°

Valve stem diameter:

Intake - 6.965-6.980 mm
Exhaust - 6.945-6.960 mm

Valve guide bushing outer diameter - 11.023-11.034 mm

Valve guide bushing clearance in the head - 0.027-0.059 mm

Valve guide bushing inner diameter: 7.000-7.018 mm

Cylinder block

Material - Cast iron

Permissible distortion of the surface under the gasket is 0.1 mm

Cylinder bore diameter:

CA 16S - 77.950-78.000 mm
CA 18NS - No information
SA 18ET - 83.000-83.050 mm
CA 20S, CA 20E - 84.500-84.550 mm

Maximum permissible taper is 0.02 mm

Maximum permissible ovality is 0.02 mm

Pistons and rings

Skirt diameter - (20mm above the base of the skirt):

CA 16S — 77.915-77.965 mm
CA 18NS - 82.665-82.715 mm
SA 18ET - 82.965-83.015 mm
CA 20S, CA 20E - 84.465-84.515 mm

Permissible increase in size:

Early CA 18NS - 0.30 mm, 0.80 mm
Late CA 18NS and all other models - 0.50mm, 1.00mm

Cylinder-piston clearance — 0.025-0.045 mm

Piston pin outer diameter - 19.995-20.000 mm

Piston pin clearance in the piston - 0.008-0.012 mm

Piston pin fit in connecting rod - 0.017-0.038 mm

Lateral clearances of rings:

Upper - 0.040-0.073 mm
Second - 0.030-0.063 mm
Wear limit - 0.1 mm

Ring cutting gap:

Upper:

CA 16S — 0.20-0.46 mm
CA 18NS - No information
CA 18ET - 0.19-0.42 mm
CA 20S, CA 20E - 0.25-0.51 mm

Second:

CA 16S - 0.14-0.41 mm
CA 18NS - No information
CA 18ET - 0.15-0.41 mm
CA 20S — 0.25-0.51 mm
CA 20E — 0.15-0.31 mm

Oil scraper - 0.20-0.76 mm

Crankshaft

Number of main bearings - Five

Main journal diameter: 52.951-52.964 mm

The diameter of the connecting rod journals is 44.961-44.974 mm

Permissible taper of main and connecting rod journals - 0.03 mm maximum

Permissible out-of-roundness of main and connecting rod journals is 0.03 mm maximum

Crankshaft clearance - 0.3 mm maximum

Main bearing working clearance (standard) — 0.020-0.047 mm

Wear limit - 0.1 mm maximum

Change in main bearing sizes - 0.25 mm, 0.50 mm

Connecting rods

Lateral clearance - 0.2-0.3 mm

Wear limit - 0.3 mm

Lower connecting rod head bearing clearance - 0.1 mm maximum

The outer size of the lower end bearing of the connecting rod is 0.08 mm, 0.12 mm, 0.25 mm, 0.50 mm

Lubrication system

System pressure (oil temperature 77-83°C):

Idle speed - 59 kPa minimum
Frequency 3200 rpm - 324-510 kPa

Oil filter — Champion C109

Oil type - Universal motor oil, API SF or SG. Viscosity SAE 10W/30 - 20W/50 (Duckhams QXR, Hypergrade, or 10W/40)

Oil pump clearances:

Between the internal gear and the crescent - 0.12-0.23 mm
Between the outer gear and the crescent - 0.21-0.32 mm
Between the outer gear and the housing - 0.11-0.20 mm
External clearance of gears - 0.05-0.11 mm
Internal clearance of gears - 0.05-0.09 mm

Tightening torques Nm

Valve Cover Screws - 1-3

Rocker Arm Adjuster Screw Lock Nut - 18-22

Rocker arm axle mounting bolts - 18-22

Left cylinder head cover bolts - 6-10

Fuel Pump Mounting Plate Bolts - 78-88

Camshaft Timing Pulley Bolt - 78-88

Timing Belt Cover Bolts - 3-5

Cylinder head mounting bolts:

Stage 1 - 29
Stage 2 - 78
Step 3 - Completely loosen all bolts
Stage 4 - 29
Stage 5 - 74-83 or tightened to 83°-88° (bolt 8), 75° - 80 (all other bolts) clockwise

Timing Belt Tensioner Bolts A and B - 15-20

Crankshaft Pulley Bolt - 123-132

Oil Pump Mounting Bolt (Large) - 12-16

Oil pump mounting bolts (small) - 6-7

Oil Drain Pipe and Strainer Bolts - 10-14

Oil pump cover screws - 4-5

Pressure regulator cover - 39-49

Pan bolts:

2.0 liter fuel injected models - 7-8
All other models - 5-7

Crankcase ventilation baffle mounting bolts — 4-6

Release bearing cover mounting bolts — 44-54

Connecting rod nuts - 32-36

Crankshaft oil seal retainer mounting bolts — 4-6

Flywheel/drive plate - 98-108

Oil pressure sensor - 10-16

Oil cooler retainer mounting nuts - 20-25

Oil cooler/strut - 29-39

Generator mounting bolts (and air conditioning compressors) to the cylinder block - 69-78

Engine front and rear struts - 43-58

Oil pan drain plug - 29-39

Engine mount in the longitudinal section: