Nissan TB42

Nissan TB42The Nissan TB42 is a 4.2 liter (4,169 cc, 254.41 cu·in) straight-six, four-stroke cycle gasoline engine manufactured by Nissan Diesel Motor Co., Ltd. from 1987 to 1997.

The Nissan TB42 engine has a cast-iron block, aluminum cylinder head, overhead valves design (12 valves in total, 2 per cylinder), seven-bearing crankshaft, a two-barrel carburetor and a point type distributor for TB42S or electronic fuel injection and electronic ignition for TB42E version.

Cylinder bore and piston stroke are 96.0 mm (3.78 in) and 96.0 mm (3.78 in), respectively. The compression ratio is 8.3:1. This engine produced 175 PS (129 kW; 173 HP) at 4,200 rpm of horsepower and 320 N·m (32.6 kg·m, 235.8 ft·lb) at 3,200 rpm of torque.

The breakdown of the engine code is as follows:

  • TB42 – Engine Family
  • 42 – 4.2 Liter Displacement
  • S/E – Carburetor / Electronic fuel injection

General information

Engine Specifications
Engine codeTB42
LayoutFour stroke, Inline-6 (Straight-6)
Fuel typeGasoline
Displacement4.4 L, 4,169 cc (254.41 cu in)
Fuel systemCarburetor or Electronic fuel injection
Power adderNone
Max. horsepower175 PS (129 kW; 173 HP) at 4,200 rpm
Torque output320 N·m (32.6 kg·m, 235.8 ft·lb) at 3,200 rpm
Firing order1-5-3-6-2-4
Dimensions (L x H x W):

Cylinder block

The TB42 engine has a cast-iron cylinder block, bore is 96.0 mm (3.78 in) and stroke is 96.0 mm (3.78 in). The pistons are each fitted with two compression rings and a single oil ring.

Cylinder block
Cylinder block alloyCast-iron
Compression ratio:8.3:1
Cylinder bore:96.0 mm (3.78 in)
Piston stroke:96.0 mm (3.78 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:7
Cylinder inner diameter (standard):96.000-96.010 mm (3.7795-3.7799 in)
Piston skirt diameter (standard):95.975-95.985 mm (3.7785-3.7789 in)
Piston pin outer diameter:22.989-22.995 mm (0.9051-0.9053 in)
Piston ring side clearance:Top0.040-0.073 mm (0.0016-0.0029 in)
Second0.030-0.063 mm (0.0012-0.0025 in)
Oil0.015-0.185 mm (0.0006-0.0073 in)
Piston ring end gap:Top0.30-0.45 mm (0.0118-0.0177 in)
Second0.30-0.45 mm (0.0118-0.0177 in)
Oil0.20-0.60 mm (0.0079-0.0236 in)
Connecting rod center distance:166.45-166.55 mm (6.5531-6.5571 in)
Connectin rod small end inner diameter:23.000-23.006 mm (0.9055-0.9057 in)
Crankshaft journal diameter:70.907-70.920 mm (2.7916-2.7921 in)
Crankpin diameter:56.913-56.926 mm (2.2407-2.2412 in)
Crankshaft center distance:48.000 mm (1.89 in)

Cylinder head

Intake valves are 47.0 mm (1.8504 in) in diameter, intake duration is 248 °, and the exhaust valves are 38.0 mm (1.4961 in), exhaust duration is 248 °.

Cylinder head
Valve Arrangement:OHV, chain drive
Valves:12 (2 valves per cylinder)
Intake/Exhaust duration:248° / 248°
Valve head diameter:INTAKE47.0-47.2 mm (1.8504-1.8583 in)
EXHAUST38.0-38.2 mm (1.4961-1.5039 in)
Valve length:INTAKE116.7-117.0 mm (4.5945-4.6063 in)
EXHAUST117.0-117.3 mm (4.6063-4.6181 in)
Valve stem diameter:INTAKE7.965-7.980 mm (0.3136-0.3142 in)
EXHAUST7.945-7.960 mm (0.3128-0.3134 in)
Cam height:INTAKE42.311-42.561 mm (1.6658-1.6756 in)
EXHAUST42.311-42.561 mm (1.6658-1.6756 in)

Maintenance data

Valve clearance (COLD)
Intake valve0.20 mm (0.0079 in)
Exhaust valve0.20 mm (0.0079 in)
Valve clearance (HOT)
Intake valve0.38 mm (0.015 in)
Exhaust valve0.38 mm (0.015 in)
Compression pressure
Standard12.0 kg/cm2 (11.77 bar, 171 psi) / 250 rpm
Minimun9.0 kg/cm2 (8.83 bar, 128 psi) / 250 rpm
Compression differential limit between cylinders1.0 kg/cm2 (0.98 bar, 14 psi) / 350 rpm
Oil system
Oil consumption , L/1000 km (qt. per miles)up to 0.5 (1 qt. per 1200 miles)
Recommended engine oil 10W-30
Oil type APISE or SF
Engine oil capacity (Refill capacity) With filter change 8.2 l
Without filter change 7.7 l
Oil change interval, km (miles)5,000 (3,000)
Ignition system
Ignition timing (B.T.D.C./rpm)10°/650 rpm
Spark plugNGK: BP5ES
Spark plug gap0.8-0.9 mm (0.03 -0.035 in)
Point gap0.45-0.55 mm (0.018-0.022 in)
Dwell angle34°-40°

Vehicle applications

ModelYears Produced
Nissan Safary (Y60)
Komatsu Forklift (CX-series)
Author: Sergei Wers
About: Co-founder and CEO of a multi-brand auto repair shop (engine repair, chassis repair, body repair and painting) for over 15 years. I have been developing internet sites with technical specifications for more than seven years.

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  1. Hello
    This is Joel from Tanzania I have Nissan Safari automatic transmission. Now there is problem with gear box it doesn’t transfer from gear no two to no three so I need to know what can I do with it. And normally what can start with to check and fix it.

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