The 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
|Layout||Four stroke, Inline-6 (Straight-6)|
|Displacement||4.4 L, 4,169 cc (254.41 cu in)|
|Fuel system||Carburetor or Electronic fuel injection|
|Max. horsepower||175 PS (129 kW; 173 HP) at 4,200 rpm|
|Torque output||320 N·m (32.6 kg·m, 235.8 ft·lb) at 3,200 rpm|
|Dimensions (L x H x W):||–|
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 alloy||Cast-iron|
|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:||Top||0.040-0.073 mm (0.0016-0.0029 in)|
|Second||0.030-0.063 mm (0.0012-0.0025 in)|
|Oil||0.015-0.185 mm (0.0006-0.0073 in)|
|Piston ring end gap:||Top||0.30-0.45 mm (0.0118-0.0177 in)|
|Second||0.30-0.45 mm (0.0118-0.0177 in)|
|Oil||0.20-0.60 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)|
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 °.
|Valve Arrangement:||OHV, chain drive|
|Valves:||12 (2 valves per cylinder)|
|Intake/Exhaust duration:||248° / 248°|
|Valve head diameter:||INTAKE||47.0-47.2 mm (1.8504-1.8583 in)|
|EXHAUST||38.0-38.2 mm (1.4961-1.5039 in)|
|Valve length:||INTAKE||116.7-117.0 mm (4.5945-4.6063 in)|
|EXHAUST||117.0-117.3 mm (4.6063-4.6181 in)|
|Valve stem diameter:||INTAKE||7.965-7.980 mm (0.3136-0.3142 in)|
|EXHAUST||7.945-7.960 mm (0.3128-0.3134 in)||Cam height:||INTAKE||42.311-42.561 mm (1.6658-1.6756 in)|
|EXHAUST||42.311-42.561 mm (1.6658-1.6756 in)|
|Valve clearance (COLD)|
|Intake valve||0.20 mm (0.0079 in)|
|Exhaust valve||0.20 mm (0.0079 in)|
|Valve clearance (HOT)|
|Intake valve||0.38 mm (0.015 in)|
|Exhaust valve||0.38 mm (0.015 in)|
|Standard||12.0 kg/cm2 (11.77 bar, 171 psi) / 250 rpm|
|Minimun||9.0 kg/cm2 (8.83 bar, 128 psi) / 250 rpm|
|Compression differential limit between cylinders||1.0 kg/cm2 (0.98 bar, 14 psi) / 350 rpm|
|Oil consumption , L/1000 km (qt. per miles)||up to 0.5 (1 qt. per 1200 miles)|
|Recommended engine oil||10W-30|
|Oil type API||SE 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 timing (B.T.D.C./rpm)||10°/650 rpm|
|Spark plug||NGK: BP5ES|
|Spark plug gap||0.8-0.9 mm (0.03 -0.035 in)|
|Point gap||0.45-0.55 mm (0.018-0.022 in)|
|Nissan Safary (Y60)||–|
|Komatsu Forklift (CX-series)||–|
We try to use verified sources and official documentation, however, differences between sources or errors in entering information may occur. We do not provide advice on technical issues related to the engines operation or repair. We do not recommend using provided information for engines repairing engines or spare parts ordering, use only official service manuals and spare-parts catalogs.
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