The Nissan FD46 is a 4.6 l (4,617 cc, 281.75 cu·in) straight-four, water-cooled naturally aspirated diesel engine from Nissan FD family. The engine was manufactured by UD Trucks (Nissan Diesel) from 1991 to 1995.
The Nissan FD46 has a cast-iron cylinder block, a cylinder head with OHV (overhead valves with single camshaft), two valves per cylinder (8 in total) and a direct fuel injection system.
A 108.0 mm (4.25 in) cylinder bore and 126.0 mm (4.96 in) piston stroke give the FD46 engine a total of 4617 cc of displacement. The compression ratio rating is 18.0:1. This engine produced 135 PS (99 kW; 133 HP) at 3,000 rpm of horsepower and 329 N·m (33.5 kg·m, 242.5 ft·lb) at 1,800 rpm of torque.
The breakdown of the engine code is as follows:
- FD – Engine Family
- 46 – 4.6 Liter Displacement
General information
| Engine Specifications | |
| Engine code | FD46 |
| Layout | Straight-4, vertical |
| Fuel type | Diesel |
| Production | 1991-1995 |
| Displacement | 4.6 L, 4,617 cc (281.75 cu in) |
| Fuel system | Direct injection system |
| Power adder | none |
| Max. Horsepower | 135 PS (99 kW; 133 HP) at 3,000 rpm |
| Torque output | 329 N·m (33.5 kg·m, 242.5 ft·lb) at 1,800 rpm |
| Firing order | 1-3-4-2 |
| Dimensions (L x H x W): | – |
| Weight | – |
Cylinder block
The Nissan FD42 motor has a cast-iron cylinder block with a five-bearings supported system and an aluminum alloy piston for high strength, lightweight and good heat conductivity; two compression and one oil control rings. The cylinder bore is 108.0 mm (4.25 in), piston stroke is 126.0 mm (4.96 in). The compression ratio rating is 18.0:1.
| Cylinder block | ||
| Cylinder block alloy | Cast-iron | |
| Compression ratio: | 18.0:1 | |
| Cylinder bore: | 108.0 mm (4.25 in) | |
| Piston stroke: | 126.0 mm (4.96 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 5 | |
| Cylinder inner diameter: | 108.020-108.050 mm (4.2527-4.2539 in) | |
| Piston skirt diameter | 107.920-107.930 mm (4.2488-4.2492 in) | |
| Piston ring side clearance: | Top | 0.070-0.110 mm (0.0028-0.0043 in) |
| Second | 0.040-0.080 mm (0.0016-0.0031 in) | |
| Oil | 0.020-0.060 mm (0.0008-0.0024 in) | |
| Piston ring end gap: | Top | 0.300-0.450 mm (0.0118-0.0177 in) |
| Second | 0.300-0.450 mm (0.0118-0.0177 in) | |
| Oil | 0.250-0.450 mm (0.0098-0.0177 in) | |
| Piston pin outer diameter | 35.993-36.000 mm (1.417-1.4173 in) | |
| Connecting rod center distance | 178.775-178.825 mm (7.0384-7.0403 in) | |
| Crankshaft main journal diameter: | 77.920-77.940 mm (3.0677-3.0685 in) | |
| Crankpin diameter: | 64.925-64.945 mm (2.5561-2.5569 in) | |
| Crankshaft center distance: | 63.0 mm (2.48 in) | |
Connecting rod bearing nut
- 113-118 Nm; 11.5-12.0 kg·m; 83-87 ft·lb
Crankshaft pulley
- 490-539 Nm; 50-55 kg·m; 362-389 ft·lb
Flywheel fixing bolts
- 265-284 Nm; 27-29 kg·m; 195-210 ft·lb
Cylinder head
The engine has OHV design with a single camshaft and two valves per cylinder (8 valves in total). Intake valves are 48.5 mm (1.91 in) in diameter, and the exhaust valves are 39.5 mm (1.55 in).
| Cylinder head | ||
| Valve Arrangement: | OHV | |
| Valves: | 8 (2 valves per cylinder) | |
| Valve head diameter: | INTAKE | 48.4-48.6 mm (1.9055-1.9134 in) |
| EXHAUST | 39.4-39.6 mm (1.5512-1.5591 in) | |
| Valve length: | INTAKE | 128.65-129.25 mm (5.065-5.0886 in) |
| EXHAUST | 129.70-130.30 mm (5.1063-5.1299 in) | |
| Valve stem diameter: | INTAKE | 8.970-8.985 mm (0.3531-0.3537 in) |
| EXHAUST | 8.935-8.950 mm (0.3518-0.3524 in) | |
| Valve spring free length: | INTAKE |
Inner: 58.9 mm (2.3189 in) Outer: 59.5 mm (2.3425 in) |
| EXHAUST |
Inner: 58.9 mm (2.3189 in) Outer: 59.5 mm (2.3425 in) |
|
| Camshaft cam height: | INTAKE | 47.005-47.025 mm (1.8506-1.8514 in) |
| EXHAUST | 47.005-47.025 mm (1.8506-1.8514 in) | |
Maintenance data
| Valve clearance (HOT) | |
| Intake valve | 0.40 mm (0.0157 in) |
| Exhaust valve | 0.40 mm (0.0157 in) |
| Compression pressure | |
| Standard | 30 kg/cm2 (29.4 bar, 426 psi) / 200 rpm |
| Minimun | 25 kg/cm2 (24.5 bar, 356 psi) / 200 rpm |
| Compression differential limit between cylinders | 3 kg/cm2 (2.9 bar, 42 psi) / 200 rpm |
| Oil system | |
| Recommended engine oil | API CC or CD |
| SAE Viscosity Number |
For cold and warm areas: 10W-30 For hot areas: 20W-40 and 20W-50 |
| Engine oil capacity |
With oil filter: 9.6 l Without oil filter: 8.3 l |
Vehicle applications
| Model | Years Produced |
| Nissan Atlas (H41) | 1991-1995 |
| Nissan Condor (S41) | 1991-1995 |
Author:
Extremely helpful information. Thank you.
Hi… am actually rebuild an fd46 engine for my friend.
Hallo
I have an ed33 engine in a Nissan cabsta my problem now is bit old I want to that can I put FD46 and what else can I change in truck
Thanx
Yedek parça tedariği nerden yapabilirim
Hi, can I put a ADE 364 or Nissan 2.7 bakkie engine in a Nissan Cabstar?