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
General information
| Engine Specifications | |
| Engine code | TB42 |
| Layout | Four stroke, Inline-6 (Straight-6) |
| Fuel type | Gasoline |
| Production | 1987-1997 |
| Displacement | 4.4 L, 4,169 cc (254.41 cu in) |
| Fuel system | Carburetor or Electronic fuel injection |
| Power adder | None |
| 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 |
| Firing order | 1-5-3-6-2-4 |
| Dimensions (L x H x W): | – |
| Weight | – |
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 alloy | Cast-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: | 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) | |
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: | 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) | |
Maintenance data
| 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) |
| Compression pressure | |
| 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 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 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 system | |
| 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) |
| Distributor | |
| Point gap | 0.45-0.55 mm (0.018-0.022 in) |
| Dwell angle | 34°-40° |
Vehicle applications
| Model | Years Produced |
| Nissan Safary (Y60) | – |
| Komatsu Forklift (CX-series) | – |
Author:
WHAT IS THE ESTIMATED CONSUMPTION?HOW MANY KILOMITERS PER LITTER?
its how many LITTERS by KILO !
I get around town 23ltrs per km, and out in the Country 18.9 per 100 … bit heavy but it’s well worth it.!
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.
Check the ATF and top up if need be
G’day, what size is the ‘high idle’ vacuum tube, and does it ‘push’ in please?
Do Nissan Diesels run a timing belt or chain?