The Nissan TD25 is a 2.5 L (2,488 cc, 151.8 cu·in) straight four, water-cooled naturally aspirated diesel engine from Nissan TD family. The engine was manufactured from 1985.
The TD25 has a cast-iron cylinder block, a cast-iron cylinder head with OHV (over-head valves) design and two valves per cylinder. The camshaft is driven from the crankshaft by the timing gear. The cylinder bore is 93.0 mm (3.66 in) and the piston stroke is 92.0 mm (3.62 in). Compression ratio rating is 22:1.
The TD25 engine produced 81 PS (60 kW; 80 HP) at 4,300 rpm of maximum output power and 166 N·m (16.9 kg·m, 122.3 ft·lb) at 2,200 rpm of peak torque.
The breakdown of the engine code is as follows:
- TD – Engine Family
- 25 – 2.5 Liter Displacement
General information
| Engine Specifications | |
| Engine code | TD25 |
| Layout | Straight-4, vertical |
| Fuel type | Diesel |
| Production | 1985-2015 |
| Displacement | 2.5 L, 2,488 cc (151.8 cu in) |
| Injection pump | Mechanical fuel injection pump |
| Power adder | none |
| Max. Horsepower | 81 PS (60 kW; 80 HP) at 4,300 rpm |
| Torque output | 166 N·m (16.9 kg·m, 122.3 ft·lb) at 2,200 rpm |
| Firing order | 1-3-4-2 |
| Dimensions (L x H x W): | – |
| Weight | – |
Cylinder block
The Nissan TD25 motor has a cast-iron cylinder block with the five-bearings supported system. A 93.0 mm (3.66 in) cylinder bore and 92.0 mm (3.62 in) piston stroke give the TD25 engine a total of 2,488 cc of displacement. Compression ratio rating is 22:1.
| Cylinder block | ||
| Cylinder block alloy | Cast iron | |
| Compression ratio: | 22.0:1 | |
| Cylinder bore: | 93.0 mm (3.66 in) | |
| Piston stroke: | 92.0 mm (3.62 in) | |
| Number of piston rings (compression / oil): | 2 / 1 | |
| Number of main bearings: | 5 | |
| Cylinder inner diameter: | 92.900-92.910 mm (3.6575-3.6579 in) | |
| Piston skirt diameter | 92.840-92.850 mm (3.6551-3.6555 in) | |
| Piston ring side clearance: | Top | 0.060-0.100 mm (0.0024-0.0039 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 | 0.200-0.350 mm (0.0079-0.0138 in) | |
| Oil | 0.150-0.350 mm (0.0059-0.0138 in) | |
| Piston pin outer diameter | 24.994-25.000 mm (0.9840-0.9843 in) | |
| Piston pin hole diameter | 27.997-28.005 mm (1.1022-1.1026 in) | |
| Crankshaft main 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: | 46.0 mm (1.81 in) | |
Cylinder head
The engine has OHV (overhead valves) design with two valves per cylinder (8 in total). The camshaft is driven from the crankshaft by a timing gear, the injection pump is also driven by a gear. Intake valves are 41.5 mm (1.63 in) in diameter, and the exhaust valves are 37.0 mm (1.46 in).
| Cylinder head | ||
| Block head alloy | Cast-iron | |
| Valve Arrangement: | OHV, gear drive | |
| Valves: | 8 (2 valves per cylinder) | |
| Valve head diameter: | INTAKE | 41.4-41.6 mm (1.6299-1.6378 in) |
| EXHAUST | 36.9-37.1 mm (1.4528-1.4606 in) | |
| Valve length: | INTAKE | 117.0 mm (4.6063 in) |
| EXHAUST | 117.0 mm (4.6063 in) | |
| Valve stem diameter: | INTAKE | 7.962-7.977 mm (0.3135-0.3141 in) |
| EXHAUST | 7.945-7.960 mm (0.3128-0.3134 in) | |
| Valve spring free length: |
White: 52.04 mm (2.0488 in) Yellow: 52.3 mm (2.0591 in) |
|
| Camshaft cam height: | INTAKE | 41.733 mm (1.643 in) |
| EXHAUST | 41.900 mm (1.6496 in) | |
Maintenance data
| Valve clearance (HOT) | |
| Intake valve | 0.35 mm (0.0138 in) |
| Exhaust valve | 0.35 mm (0.0138 in) |
| Compression pressure | |
| Standard | 30.0 kg/cm2 (29.4 bar, 427 psi) / 200 rpm |
| Minimun | 25.0 kg/cm2 (24.5 bar, 356 psi) / 200 rpm |
| Compression differential limit between cylinders | 3.0 kg/cm2 (2.9 bar, 43 psi) / 200 rpm |
| Oil system | |
| Recommended engine oil | 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: 6.2 l Without oil filter: 5.5 l |
Vehicle applications
| Model | Years Produced |
| Nissan Navara (D21) | 1985-1997 |
| Nissan Caravan (E24) | 1986-2001 |
| Nissan Homy (E24) | 1986-2001 |
| Nissan Cedric (Y31) | 1990-2015 |
| Nissan Atlas 2t (H40) | 1986-1991 |
Author:
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im looking for cylinder head for Nissan TD25 ONE TONER
I need Nissan Nissan td25 piston rings for complete overhauling
Please, give me of the best price Nissan TD25 cylinder head and gasket head. Thanks
I got a 97 hardbody it looks yo have had a head job
When truck gets to 3 grand it starts to sound like it’s coming to peices….any thoughts on the issue….doesn’t smoke or run hot ju just soundd like it’s coming apart
Good day
Please help with the Torque settings on TD25 NISSAN 1Tonner Cylinder head and on Big end bearings
HOW MANY LITRES CONSUME PER 100 KILOMETRES
Is it possible to add a turbocharger to this engine? td25 diesel 4 cylinders. And if so, which one is suitable? nissan picap 1998.