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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Nissan Maxima QX (1993 release)

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Nissan Maxima QX
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Nissan
Maxima QX
Introduction
Operating Instructions
Adjustment and routine maintenance
Engine
Engines SOHC
Engines DOHC
Total engine overhaul
general information
Checking oil pressure
Check the compression pressure in the cylinders
Diagnostics of the engine with vacuum gauge application
Alternative variants of schemes of regenerative repair of the engine
Removal of the power unit from the car - preparation and precautions
Removing and installing engine
An order of dismantling of the engine by its preparation for major repairs
Dismantling of a head of cylinders
Cleaning and checking the status of a head of cylinders
Service valves
Assembling the cylinder head
Removing the connecting rod and piston assembly
Removing the crankshaft
Cleaning the engine block
Checking the status of the unit
Honing of cylinder bores
Checking the components connecting rod and piston group
Checking the status of the crankshaft
Check and selection of loose leaves main and connecting rod bearings of the crankshaft
Checking the camshafts, valve tappets and bearings
The order of assembly of the engine
Installation of the piston rings
Installation of a cranked shaft and check of working backlashes of radical bearings
Installing the crankshaft rear oil seal
Installing the connecting rod and piston assemblages and check of size of working backlashes in connecting rod bearings of the crankshaft
Test run and running the engine after major repairs
System of cooling, heating
The power supply system and release
Electric motor
Engine Control Systems
Transmission
Coupling and power shafts
Brakes
Suspension and steering
Body
Onboard electric
 


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Checking the status of the crankshaft



PERFORMANCE ORDER

1. grindstone, needle files, or a scraper to remove burrs from the edges of the oil holes.

2. Rinse the crankshaft solvent, and then dry thoroughly as possible using compressed air. Do not forget to clean the oil holes with a stiff brush. Then rinse them well with solvent.

When using compressed air do not forget to wear safety goggles!

3. Check the indigenous and crank pins for scoring, cavities, cracks and signs of uneven wear.
4. Inspect the entire surface of the shaft for cracks and other damage. To detect hidden cracks should resort to the magnetic particle inspection, - give a shaft in car-care center workshop.

5. micrometer measure diameters of main and connecting rod shaft necks. Measure the diameter of the neck of each produce at several points along the length and circumference, which will estimate the value of its taper and roundness, which should not go beyond the permissible range (see. Specifications). It should also assess the value of the crankshaft run-out - take a couple of V-shaped blocks and measuring DTI. In the absence of the necessary equipment, contact professional help service centers.

6. If wear / taper / oval necks exceeds the permissible value, or there are mechanical damage to the surfaces, the crankshaft should be given in the groove. After the groove of the shaft need to pick up new loose leaves of radical and / or the connecting rod bearing corresponding repair size.

7. Check the gland necks on both journals of the crankshaft. Have developed grooves, burrs or scoring will exit the new seals of action in the very near future. In some cases, the pintle may be recovered by the bore and pressing onto them special thin-walled sleeves. If such regenerative repair is not possible, replace the shaft.

8. Check the condition of loose leaves of radical bearings and rod (see. Section Check of a condition and selection of loose leaves radical and connecting rod bearings of the crankshaft).





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Checking the components connecting rod and piston group
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Check and selection of loose leaves main and connecting rod bearings of the crankshaft

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