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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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Service valves



Given the complexity of the nature of work and the need for special equipment, performance of service valves, their guides and seats would be the right thing to entrust the service center personnel.

On their own car owner may be made procedures such as disassembling the head, the primary cleaning and checking the status of the valve train components. This is usually made sufficiently clear idea of the amount of work to be performed and can be prepared a sample list of necessary replacement components. Then head should collect and deliver professional service in a workshop service centers.

Experts workshop will be removed from the valve head and valve springs and will make necessary regenerative repair or replace worn components (valves, their saddles, guides, springs, plates of springs and crackers of cutting locks). Compulsory replacing stem seals. After assembly, the components will be tested installation height of the valve springs. If necessary, experts will bore head to restore the flatness of its mating surfaces.

After completion of the repair professional head her condition usually corresponds to the new one. Before installing the motor do not be lazy once again thoroughly clean the head, completely removed from all its cavities and channels metal sawdust, traces of grit and other small industrial waste. All channels and apertures blow compressed air (do not forget to wear safety goggles).




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Cleaning and checking the status of a head of cylinders
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Assembling the cylinder head

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