The Honda GD320 is a 317 cc (19.34 cu-in) single-cylinder, air-cooled, four-stroke internal combustion diesel engine with horizontal shaft, manufactured by Honda Motor Company for general-purpose applications since 1988.
This engine has a single cylinder and overhead valves. The GD320 engine has a recoil starter or starter motor.
A 76.0 mm (2.99 in) cylinder bore and 70.0 mm (2.76 in) piston stroke give the engine a total of 317 cc (14.4 cu-in) of displacement. Compression ratio rating is 19.0:1.
The Honda GD320 produced 7.1 PS (5.2 KW; 7.0 HP) at 3,600 rpm of maximum output power and 6.0 HP (4.4 kW) of continuous output. The peak torque is 15.7 Nm (1.6 kg·m; 11.6 lbf·ft) at 2,500 rpm.
General information
| Engine Specifications | |
| Model | GD320 |
| Type | 4-stroke, OHV, single cylinder |
| Displacement | 317 cm 3 (19.34 cu-in) |
| Max. horsepower | 7.1 PS (5.2 KW; 7.0 HP) at 3,600 rpm |
| Max. torque (crank PTO) | 15.7 Nm (1.6 kg·m; 11.6 lbf·ft) at 2,500 rpm |
| Cooling system | Forced-air |
| Lubricating system | Forced spray |
| Starting system | Recoil starter or starter motor |
| Stoping system | Fuel cut with speed control lower (Stop lever) |
| Fuel used | Diesel fuel |
| Fuel tank capacity | 4.6 liters (4.9 US.qts, 4.0 Imp. qts) |
| Fuel consumption | 180 g/HPh |
| PTO shaft rotation | Counterclockwise (from PTO shaft side) |
Dimensions and Weight
| S | Q | W | V | |||||
| Length, mm (in) | 420 (16.5) | 445 (17.5) | 460 (18.1) | 465 (18.3) | ||||
| Width, mm (in) | 405 (15.9) | |||||||
| Height, mm (in) | 470 (18.5) | |||||||
| Dry weight, kg (lb) | 48.0 (105.8) | |||||||
| Operating weight, kg (lb) |
53.0 (116.9) | |||||||
Cylinder Block and Head
| Cylinder block | ||
| Compression ratio: | 19.0:1 | |
| Bore x Stroke | 76.0 mm X 70.0 mm (2.99 x 2.76 in) | |
| Sleeve internal diameter | 76.000-76.017 mm (2.9921-2.9928 in) | |
| Piston skirt outer diameter | 75.940-75.960 mm (2.9898-2.9905 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Piston ring side clearance (Top): | 0.065-0.095 mm (0.0026-0.0037 in) | |
| Piston ring side clearance (Second): | 0.055-0.085 mm (0.0022-0.0033 in) | |
| Piston ring side clearance (Oil): | 0.020-0.055 mm (0.0008-0.0022 in) | |
| Piston ring end gap (Top): | 0.200-0.350 mm (0.008-0.014 in) | |
| Piston ring end gap (Second): | 0.200-0.350 mm (0.008-0.014 in) | |
| Piston ring end gap (Oil): | 0.200-0.400 mm (0.008-0.016 in) | |
| Ring width (Top): | 1.990-1.975 mm (0.0783-0.0778 in) | |
| Ring width (Second): | 1.990-1.975 mm (0.0783-0.0778 in) | |
| Ring width (Oil): | 3.990-3.970 mm (0.1571-0.01563 in) | |
| Connecting rod small end ID | 20.010-20.028 mm (0.7878-0.7885 in) | |
| Connecting rod big end ID | 41.000-41.024 mm (1.6142-1.6151 in) | |
| Crankpin outer diameter | 37.976-38.000 mm (1.4951-1.4961 in) | |
| Main journal outer diameter | 46.970-46.994 mm (1.8492-1.8502 in) | |
| Cylinder Head | ||
| Distortion of cylinder head | 0.05 mm (0.002 in) | |
| Valve Arrangement: | OHV | |
| Valves: | 2 | |
| Valve stem outer diameter (INTAKE): | 6.590-6.575 mm (0.2594-0.2589 in) | |
| Valve stem outer diameter (EXHAUST): | 6.550-6.540 mm (0.2579-0.2575 in) | |
| Valve guide inner diameter (INTAKE): | 6.600-6.615 mm (0.2598-0.2604 in) | |
| Valve guide inner diameter (EXHAUST): | 6.600-6.615 mm (0.2598-0.2604 in) | |
| Spring free length | 33.7 mm (1.33 in) | |
| Camshaft cam height (INTAKE): | 41.022 mm (1.6150 in) | |
| Camshaft cam height (EXHAUST): | 41.022 mm (1.6150 in) | |
| Valve rocker arm internal diameter (INTAKE): | 16.000-16.018 mm (0.6300-0.6306 in) | |
| Valve rocker arm internal diameter (EXHAUST): | 16.000-16.018 mm (0.6300-0.6306 in) | |
| Rocker arm shaft outer diameter (INTAKE): | 15.984-15.966 mm (0.6293-0.6286 in) | |
| Rocker arm shaft outer diameter (EXHAUST): | 15.984-15.966 mm (0.6293-0.6286 in) | |
Tightening torque specs
| Tightening torque specs | |
| Cylinder head bolts | 43 Nm; 4.3 kg·m; 31 ft·lb |
| Cylinder head nuts | 11 Nm; 1.1 kg·m; 8 ft·lb |
| Rocker arm shaft nuts | 11 Nm; 1.1 kg·m; 8 ft·lb |
| Tappet adjusting nuts | 9 Nm; 0.9 kg·m; 6.5 ft·lb |
| Oil pan bolt bolts |
M11: 71 Nm; 7.1 kg·m; 51 ft·lb M8: 22 Nm; 2.2 kg·m; 16 ft·lb |
| Connecting rod cap nuts | 32 Nm; 3.2 kg·m; 23 ft·lb |
| Relief valve | 33 Nm; 3.3 kg·m; 24 ft·lb |
| Drain plug bolt | 33 Nm; 3.3 kg·m; 24 ft·lb |
| Flywheel nut | 250 Nm; 25.0 kg·m; 180 ft·lb |
| Injection nozzle | 10 Nm; 1.0 kg·m; 7 ft·lb |
| Air breather joint nuts | 18 Nm; 1.8 kg·m; 13 ft·lb |
| Fuel injection pump bolts | 22 Nm; 2.2 kg·m; 16 ft·lb |
| Fuel joint bolts | 28 Nm; 2.8 kg·m; 20 ft·lb |
| Air breather bolt | 18 Nm; 1.8 kg·m; 13 ft·lb |
| Fuel pipe nuts | 20 Nm; 2.0 kg·m; 14 ft·lb |
| Muffler nuts, bolts | 22 Nm; 2.2 kg·m; 16 ft·lb |
| Fuel tank bolts | 11 Nm; 1.1 kg·m; 18 ft·lb |
| Fuel filter bolts | 11 Nm; 1.1 kg·m; 18 ft·lb |
| Drain bolt | 11 Nm; 1.1 kg·m; 18 ft·lb |
| Others | |
| 5 mm bolts, nuts | 5.0 Nm; 0.50 kg·m; 4.0 ft·lb |
| 6 mm bolts, nuts | 10 Nm; 1.0 kg·m; 7 ft·lb |
| 8 mm bolts, nuts | 21 Nm; 2.1 kg·m; 15 ft·lb |
| 10 mm bolts, nuts | 35 Nm; 3.5 kg·m; 25 ft·lb |
| 12 mm bolts, nuts | 60 Nm; 6.0 kg·m; 44 ft·lb |
Service Information
| Engine | |
| Maximum speed | 3,750 ± 150 rpm |
| Idle speed | 1,400 ± 150 rpm |
| Cylinder compression | 26.0 kg/cm2 (370 psi) at 300 rpm |
| Valve clearance | |
| Intake valve | 0.15 ± 0.02 (0.006 ± 0.00078) |
| Exhaust valve | 0.15 ± 0.02 (0.006 ± 0.00078) |
| Oil system | |
| Oil type | Diesel oil (API Service Classification CC or CD) |
| Recommended oil | SAE 10W-30 |
| Oil capacity | 1.15 liters (1.2 US.qts, 1.0 Imp. qts) |
| Oil pressure | 3.9-5.2 kg/cm2 (55.5-74.0 psi) at 3,600 rpm |
| Generator | |
| Resistance | 2.0 ±0.5 Ω |
| Starter motor | |
| Brush length | 10.0 mm (0.39 in) |
| Mica depth | 0.40-0.50 mm (0.016-0.020 in) |
Author:
Bonjour,
Nous sommes MECANHYDRO, une entreprise de mécanique hydraulique basé en Savoie.
Je suis à la recherche d’un joint spi qui se monte sur un moteur Honda GD320, je vous transmets les dimensions du joint.
– 37 intérieure x 64 extérieur 10 épaisseur
Cordialement
Hello! We are not a trading company, it’s only an information site.
I have a gd 410 9 HP to belt drive pressure washer at 3500 psi, can you please tell me how much pressure the Hp the gd320 would put out please. Thank you. Kenny. Fife pressure cleaning services.
MOTEUR HONDA GD320 MONTEE SUR VOITURE SANS PERMIS JDM X5 MERCI DE REPONDRE
There is a Honda GD-320 diesel generator for sale on Facebook for 2190.00. Precious little info is available. I noticed it runs at 3600 rpm. As most diesels run at 1800 rpm I question its reliability. Also I understand that this would be an older unit and parts could be an issue Your opinion would be appreciated