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Nissan 720 Repair Assistant UNDER CONSTRUCTION


Jeremiah720

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I'll be slowly adding more and more content for this thread. It will contain the basic and majority of engine rebuilds and ins and outs of your 720 years 82 to 86 all engines for each year. I will later add wiring diagrams and transmission rebuilds as well. Hope all will find this information very useful.

 

 

Datsun/Nissan 720: Last updated 9/1/2014

what year?

 

1982: SOME CONTENT (torque specs, engine disassembly for SD22)

 

Engine L4-2164cc 2.2L DSL (SD22)

 

Disassembly

 

 

  1. Separate engine and transmission and remove clutch cover and disc.
  2. Drain engine oil and coolant into suitable containers
  3. Remove accessories and mounting brackets
  4. Remove engine mounts
  5. Remove intake manifold with venturi and air duct.
  6. Remove exhaust manifold and engine sling
  7. Remove front engine components: fan, temp-coupling, fan pulley, altenator adjusting bar, crank pulley, thermostat housing, and water pump.

IMAGE1: Timer assembly removal.

timerassembly_zps4c0a9e21.png

 

  1. Remove timing cover and using a suitable puller, remove timer assembly, IMAGE1.
  2. Remove front cover and vacuum tube assembly
  3. Disconnect fuel pipes from injectors and injection pump assembly and remove fuel pipes.
  4. Remove spill tube, injectors and injector washers. Plug injector nozzle holes to prevent entry of dirt.
  5. Remove oil filter, oil cooler, and oil filter bracket.
  6. Remove injection pump and diesel pump controller assemblies.
  7. Disconnect and remove glow plug harness and oil cooler hose.
  8. Remove rocker cover and rocker shaft assembly.
  9. Remove pushrods and keep in correct order.

IMAGE2: Cylinder head loosing sequence.

Cylinderheadboltlooseningsequence_zpsa87

 

  1. Remove Cylinder head bolts in proper order sequence, IMAGE2, and remove cylinder head.
  2. To remove oil pump.

IMAGE3: Oil pump drive spindle support.

OilPumpDriveSpindleSupport_zps0578057c.p

  1. Remove spindle support and drive spindle, IMAGE3
  2. Invert engine and remove oil pan. Then remove oil pump.
  3. Straighten lock tabs and remove flywheel.

IMAGE4: Camshaft removal

camshaftremoval_zpsbc3fc183.png

 

  1. Remove camshaft locking plate, bring crankshaft to upper side, IMAGE4, and remove camshaft.
  2. Remove valve lifters and keep in correct order.
  3. Remove crankshaft gear using a suitable puller, then remove front plate.

IMAGE5: Oil jet removal

Oiljetremoval_zpsf9ac6d80.png

 

  1. Remove oil jet bolts and oil jets. IMAGE5
  2. Remove connecting rod caps and bearings
  3. Using a suitable drift, drive connecting rod, piston combinations out through cylinder head side taking care not to damage assemblies or crankshaft.

IMAGE6: Rear main bearing cap removal.

Rearmainbearing_zps81edfbe8.png

 

 

  1. Remove main bearing caps with bearing using tool, IMAGE6, to remove rear cap.
  2. Remove crankshaft and bearings. Keep bearings and caps in order.
  3. Remove oil seal from crankshaft and rear bearing cap.

PISTON & ROD DISASSEMBLY

  1. Remove piston rings with piston rings expander.
  2. Remove piston pin retainer, immerse piston in oil of 176 degrees F and push out piston pin.

CYLINDER HEAD DISASSEMBLY

  1. Remove glow plugs.
  2. Remove valves, springs and related components using a suitable spring compressor, keeping all components in correct order.
  3. Remove valve stem seals from valve guide bosses.

IMAGE8: Rocker shaft assembly

Rockershaftassembly_zps6ea8d166.png

 

ROCKER SHAFT DISASSEMBLY

  1. Remove cotter pin, washer and outer spring, IMAGE7
  2. Removce valve rockers, inner springs and rocker shaft brackets, making sure to keep all components in correct order. If rocker shaft brackets are difficult to remove. immerse rocker shaft assembly in oil of 158 degrees F for a few minutes to remove brackets.
  3. To assemble rocker shaft, reverse disassembly procedure.

 

 

 

Assembly

 

Incomplete

 

 

Specifications

 

 

Engine outer parts:

 

Water outlet bolt ________ 7- 9ft lbs

Water pump bolt M8 ___________ 7-9ft lbs

Water pump bolt M10 _________14-18ft lbs

Manifold bolt and nut ___________11-13ft lbs

Injection pump nut _____________14-18ft lbs

Nozzle Holder ________________43-51ft lbs

Oil Cooler bolt _______________ 7-9ft lbs

Oil Cooler pipe nut ____________7-9ft lbs

Timing gear cover bolt __________7-9ft lbs

Injection pump timer nut ___________43-51ft lbs

injection tube flare nut ____________22-25ft lbs

Spill tube nut _________________ 29-36ft lbs

Oil Filter bracket bolt ____________20-27ft lbs

Alternator bracket bolt _____________20-27ft lbs

Alternator to adjusting bar bolt _______ 8-10ft lbs

Diesel pump controller ____________5.8-8.0ft lbs

Diesel pump controller bracket ________ 33-45ft lbs

Thermostat housing ____________7-9ft lbs

 

Engine Internal parts:

 

Main Bearing cap bolt _______________123-127ft lbs

Crank pulley nut _________________217-239ft lbs

Flywheel bolt ______________33-36ft lbs

Front cover bolt M6_________2.9-4.3ft lbs

Front cover bolt M8 __________7-9ft lbs

Front end plate bolt ________4.3-5.1ft lbs

Camshaft gear bolt __________33-36ft lbs

Oil pump bolt ______________9-14ft lbs

Oil pan bolt ______________7-9ft lbs

Cylinder head bolt Sub _________36-47ft lbs

Cylinder head bolt Main __________87-108ft lbs

Rocker arm shaft bolt ___________14-18ft lbs

Rocker arm lock nut _____________14-18ft lbs

Camshaft thrust plate bolt _________2.9-4.3ft lbs

Connecting rod big end nut ____________38-41ft lbs

Rocker cover bolt _________________7-9ft lbs

Oil jet (for piston) ________________22-29ft lbs

 

 

 

 

 

 

 

1983: NO CONTENT

 

Nothing for this year yet sorry Coming Soon

 

 

 

1984: NO CONTENT

 

Nothing for this year yet sorry Coming Soon

 

 

 

1985: NO CONTENT

 

Nothing for this year yet sorry Coming Soon

 

 

 

1986: NO CONTENT

 

Nothing for this year yet sorry Coming Soon

 

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