Nissan issued this book to its own service network as document SMEPDS1E00-00, and this 240 page Nissan PD6, PD6T, LK850 II service manual PDF is that factory original, not a rewrite. A full Disassembly Judgment chapter helps you decide whether the engine truly needs an overhaul, running compression tests and trouble diagnosis before you commit to a teardown. generator, and regulator circuits, while the fuel system chapter carries the injection pump, boost compensator, and nozzles all the way to calibration figures. Set injection start pressure to 200 kg/cm² on a PD6, 230 on a PD6T, and hold crankshaft journal clearance between 0.04 and 0.13 mm before the caps go back on. Chasing pump timing without the factory data wastes a day. Bookmarked and text searchable, this PDF stays open beside the stand wherever your rebuild happens.
What's Inside This Nissan PD6, PD6T Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 6-11 | Method of Using This Manual, Lubrication and Fuel |
| Disassembly Judgment | 12-29 | Determining the Need for Engine Overhaul, Troubleshooting Tests, Cause of Trouble and Its Correction |
| Engine Disassembly and Reassembly | 30-49 | Disassembling Engine, Reassembling Engine, Adjustment |
| Engine Proper | 50-63 | Cleaning, Repair and Replacement |
| Cylinder Head and Valve Mechanism | 64-73 | Disassembly and Cleaning, Inspection, Repair and Replacement, Reassembling |
| Lubrication System | 74-81 | Lubricating System Diagram, Oil Pump, Oil Cooler, Oil Filter |
| Cooling System | 82-89 | Water Pump, Thermostat, Radiator and Water Tank |
| Fuel System | 90-131 | Fuel Injection Pump, Boost Compensator, Nozzle and Nozzle Holder |
| Air Intake and Exhaust System | 132-149 | Turbocharger, Air Cleaner, Exhaust Shutter, Air Cylinder |
| Electrical System | 150-169 | Starting Motor, Generator, Regulator |
| Auxiliary Equipment | 170-189 | Air Compressor, Power Steering Oil Pump |
| Engine Test Procedures | 190-197 | Measurement of Compression Pressure, Engine Performance Test Methods |
| Service Data | 198-221 | Maintenance Standard Tables, Tables of Tightening Torque |
| Tools | 222-240 | Special Tools, Wrenches |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Timer spring free length | 45 mm | p. 116 |
| Initial injection pressure (PD6) | 200 kg/cm² | p. 118 |
| Nozzle cleaning wire protrusion | 2 to 2.5 mm | p. 117 |
| Injection start pressure (PD6) | 200 kg/cm² | p. 208 |
| Clearance between crankshaft journal | 0.04 - 0.13 mm | p. 202 |
| Cylinder head height | 110 mm | p. 203 |
| Flatness (Longitudinal direction) | Less than 0.05 mm | p. 52 |
| Clearance between piston ring and ring groove (1st) | 0.07 - 0.11 mm | p. 201 |
| Clearance between piston ring and ring groove (2nd) | 0.04 - 0.08 mm | p. 201 |
| Clearance between pump gear and cover | 0.07 - 0.12 mm | p. 205 |
| Clearance between pump gear and case | 0.07 - 0.12 mm | p. 205 |
| Compression pressure (Maintenance standard) | 30 kg/cm² | p. 8 |
Nissan PD6, PD6T Common Problems This Manual Covers
Nissan PD6 hard starting, cranks strong but low compression across all cylinders
Measure compression pressure following the test procedure that starts on page 190. The maintenance standard is 30 kg/cm² (page 8). Set valve lash first, 0.4 mm on both intake and exhaust, then retest warm. Low, even readings across all cylinders point to worn rings; check top ring to groove clearance against 0.07 to 0.11 mm before ordering parts.
Manual Section: Engine Test Procedures p. 190White or black exhaust smoke with rough idle and uneven cylinder contribution
Pull the nozzles and pop test each one on a hand tester; look for a sharp, chattering spray cone. Clean carboned orifices with the cleaning wire protruding 2 to 2.5 mm from the chuck, per page 117. Reset opening pressure to the figure listed for your model on page 208, then recheck the pattern before reinstalling.
Manual Section: Fuel System p. 117Loss of power under load with high fuel consumption and sluggish throttle response
Check injection timing before condemning the pump. On a PD6, verify start of injection at 13 degrees B.T.D.C. against the specifications on page 8. On the bench, fuel should stop flowing from the No. 1 delivery valve at 3.65 mm of tappet lift, per page 116. Confirm the control rod slides freely with less than 150 g of resistance.
Manual Section: Fuel System p. 116Dull knocking from the bottom end with low oil pressure at operating temperature
Drain the sump and cut the filter open; bearing material in the pleats confirms bottom end wear. Measure main journal clearance with plastigage against the 0.04 to 0.13 mm standard on page 202. While the pan is off, check oil pump gear backlash, 0.12 to 0.26 mm on page 205. Refill with 25 liters after reassembly.
Manual Section: Engine Proper p. 50Coolant loss with overheating and combustion gas bubbling in the radiator top tank
Pressure test the cooling system and check the thermostat and water pump using the procedures that begin on page 82. If gas keeps bubbling, pull the head and lay a straightedge across the gasket face; longitudinal flatness must stay under 0.05 mm, per page 52. Measure head height against the 110 mm standard before sending it out for surfacing.
Manual Section: Cylinder Head and Valve Mechanism p. 64Frequently Asked Questions
What are the torque specifications for the Nissan PD6 cylinder head bolts?
The cylinder head bolts for the Nissan PD6 engine must be tightened in two stages. The first tightening is 15.0 to 16.0 kgm, and the second tightening is 22.0 to 23.0 kgm. p. 42
What are the torque specifications for the Nissan PD6T main bearing caps?
The main bearing cap bolts for the PD6T engine must be tightened to a torque of 24.0 to 24.8 kgm. p. 39
What is the recommended valve clearance for the Nissan PD6 and PD6T engines?
The maintenance standard for both intake and exhaust valve clearance is 0.3 mm to 0.4 mm. p. 47
What is the lubrication oil capacity for the Nissan PD6 and PD6T engines?
The total engine oil sump capacity is 25 liters. The oil pan capacity is 18 liters at the H level and 14 liters at the L level. p. 11
What is the specified injection pressure for the Nissan PD6 and PD6T engines?
The injection pressure for the PD6 engine is 200 kg/cm², and for the PD6T engine, it is 230 kg/cm². p. 8
What format is this Nissan PD6 manual in?
All 240 pages arrive as one searchable PDF at checkout. Read it at the desk, then take the phone out to the machine.
Is printing allowed for this Nissan PD6 Service Manual?
Yes. No DRM, nothing blocks printing, so run off the pages you need on whatever printer you have.
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