A full NE6 rebuild fits inside these 228 pages: the Nissan NE6 and NE6T shop manual PDF, OEM ID 8506343-13906-500-KIS, carries this six cylinder diesel from disassembly judgment through final adjustment on the stand. Disassembly judgment tables tell you whether the engine truly needs an overhaul before you pull the head, and a diagnosis guide traces low compression, hard starting, and smoke back to their causes. The fuel system chapter works through injection pump adjustment and nozzle testing, while a dedicated turbocharger section handles NE6T removal, inspection, and reassembly. Check your cylinder liners against the factory numbers: bore runs 110.03 to 110.05 mm new with a 110.40 mm wear limit, and piston to liner clearance should measure 0.14 to 0.19 mm. Guessing at clearances is how rebuilds come back. Bookmarked and text searchable, this PDF puts the maintenance standard tables one click away at any point in the job.
What's Inside This Nissan NE6, NE6T Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 5-12 | Method of Using This Manual, Engine Specifications, Lubrication and Fuel |
| Disassembly Judgment | 13-28 | Determining the Need for Engine Overhaul, Troubleshooting Tests, Cause of Trouble and Its Correction, Diagnosis Guide |
| Engine Disassembly and Reassembly | 29-48 | Disassembling Engine, Reassembling Engine, Adjustment |
| Engine Proper | 49-60 | Cylinder Block, Piston, Crankshaft, Camshaft, Connecting Rod, Flywheel |
| Cylinder Head and Valve Mechanism | 61-70 | Disassembly and Cleaning, Inspection, Repair and Replacement, Reassembling |
| Lubrication System | 71-80 | Oil Pump, Oil Cooler, Oil Filter, Bypass Oil Filter |
| Cooling System | 81-88 | Water Pump, Thermostat, Radiator, Water Tank, Fan, Fan Drive |
| Fuel System | 89-122 | Fuel Injection Pump, Nozzle, Nozzle Holder, Fuel Filter, Overflow Valve |
| Air Intake and Exhaust System | 123-128 | Air Cleaner, Exhaust Shutter, Air Cylinder |
| Electrical System | 129-148 | Starting Motor, Generator, Air Heater |
| Auxiliary Equipment | 149-162 | Air Compressor, Power Steering Oil Pump |
| Engine Test Procedures | 163-170 | Measurement of Compression Pressure, Valve Timing Measurement, Fuel Injection Timing Measurement, Engine Performance Test Methods |
| Service Data | 171-190 | Maintenance Standard Tables, Tables of Tightening Torque |
| Tools | 191-206 | Engine Disassembly and Reassembly Tools, Engine Proper Tools, Cylinder Head and Valve Mechanism Tools, Lubrication System Tools, Cooling System Tools, Fuel System Tools |
| Turbocharger | 207-228 | Specifications, Service Data, Tightening Torque, Construction, Removal, Disassembly, Inspection, Reassembly |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Inside diameter maintenance standard | 110.03 to 110.05 mm | p. 51 |
| Inside diameter wear limit | 110.40 mm | p. 51 |
| Outside diameter maintenance standard | 109.87 to 109.89 mm | p. 54 |
| Clearance between piston and cylinder liner maintenance standard | 0.14 to 0.19 mm | p. 54 |
| 1st and 2nd rings wear limit | 0.40 mm | p. 54 |
| Oil ring wear limit | 0.20 mm | p. 54 |
| Intake valve repair limit | 1.6 mm | p. 63 |
| Exhaust valve repair limit | 1.1 mm | p. 63 |
| Repair limit for clearance between pump gear and cover | 0.15 mm | p. 75 |
| Repair limit for clearance between pump gear tooth end and case | 0.20 mm | p. 75 |
| Fit of shaft and impeller | 0.04T to 0.07T mm | p. 84 |
| Clearance between water inlet and impeller | 0.69 to 2.17 mm | p. 85 |
Nissan NE6, NE6T Common Problems This Manual Covers
Nissan NE6 cranks slow when hot, starter drags and engine will not fire
Load test the battery and check voltage drop across the cables first. If cranking still drags, remove the starter and measure the commutator; turn it or replace it past the 0.4 mm repair limit on page 136, and undercut mica to 0.5 to 0.8 mm. Replace brushes worn below 16 mm on the S25-115A motor, page 137.
Manual Section: Electrical System p. 136Heavy blow-by from the breather, low compression on two cylinders, engine down on power
Run a compression test warm using the procedure on page 163 before tearing down. Measure the liner bores and replace any liner worn past the 110.40 mm limit on page 51. Check new ring end gaps in the bore against page 54, and set piston to liner clearance at 0.14 to 0.19 mm.
Manual Section: Engine Proper p. 51Coolant level dropping with white exhaust smoke, runs hot under sustained load
Pressure test the head gasket and liner seals before condemning the pump. Inspect the water pump on page 84; shaft to impeller fit must hold 0.04T to 0.07T mm interference. Verify impeller to water inlet clearance of 0.69 to 2.17 mm on page 85, and test the thermostat in heated water before reassembly.
Manual Section: Cooling System p. 85Oil pressure low when hot, oil consumption rising between changes, dull knock from the block
Verify oil level and confirm pressure with a mechanical gauge before opening anything. Pull the oil pump and measure it against page 75: replace it past 0.15 mm gear to cover clearance, 0.20 mm tooth end to case, or 0.5 mm backlash. Pressure test the oil cooler element at 10 kg/cm² per page 76.
Manual Section: Lubrication System p. 75Engine hunts and loses power at speed, smooths out after changing fuel filters
Drain the fuel tank sump, replace both filter elements, then bleed air from the filter and injection pump. Test feed pressure against the 1.1 to 1.5 kg/cm² maintenance standard on page 115. If hunting continues, pull the nozzles for pop testing and inspect the governor per the fuel system procedures starting on page 89.
Manual Section: Fuel System p. 115Loud tappet clatter from the rocker cover, will not quiet down warm
Set valve lash to 0.4 mm on both intake and exhaust per the service data on page 173. If clatter stays, pull the rocker assembly; replace bushings when rocker shaft to bushing clearance exceeds the 0.20 mm repair limit, and check push rod runout against the 0.50 mm limit on page 65.
Manual Section: Cylinder Head and Valve Mechanism p. 173Frequently Asked Questions
What are the torque specifications for the cylinder head bolts on the Nissan NE6 engine?
The cylinder head bolts must be tightened in two stages. The first tightening is to 12 kgm, and the second tightening is to 17 kgm. p. 73
What is the maintenance standard for intake and exhaust valve clearance on the NE6 engine?
The maintenance standard for both intake and exhaust valve clearance is 0.3 mm to 0.4 mm. p. 64
What is the total lubrication oil capacity for the NE6 engine?
The total lubrication oil capacity for the NE6 engine is 25 liters. p. 12
What is the maintenance standard for the V-belt tension on the NE6 engine?
The V-belt tension should be adjusted so that the belt deflection is 10 to 15 mm when pushed with a force of approximately 10 kg at the position between the generator pulley and fan pulley. p. 47
What is the maintenance standard for the cylinder compression pressure on the NE6 engine?
The maintenance standard for cylinder compression pressure is more than 28 kg/cm² at an engine speed of 180 to 220 rpm (hot engine). p. 59
Will this Nissan NE6 Shop Manual download right away?
Immediate download of the complete 228-page searchable Shop Manual. Access it on any device, from a laptop at your desk to a phone in the field.
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Yes. No DRM, nothing blocks printing, so run off the pages you need on whatever printer you have.
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