Nissan Maxima QX

since 1993 of release

Repair and car operation



Nissan Maxima QX
+ Nissan Maxima brand Cars
+ Maintenance instruction
+ Settings and routine maintenance
- Engine
   - SOHC engines
      General information
      Preparatory actions and the list of repair procedures which can be executed without engine extraction from the car
      Reduction of the piston of the first cylinder in the provision of the top dead point (VMT)
      Removal and installation of covers of heads of cylinders
      Removal, check of a condition and installation of assembly of yokes
      Replacement of maslootrazhatelny caps and klapanny springs with plates
      Removal and installation of a gas-distributing belt and cogwheels of a drive of GRM
      Removal and installation of camshafts and pushers of valves
      Removal and installation of the inlet pipeline
      Removal and installation of final collectors
      Removal and installation of heads of cylinders
      Removal and installation of a pulley of a cranked shaft
      Replacement of a forward epiploon of a cranked shaft
      Removal and installation of the pallet of a case of the engine
      Removal, check of a condition and installation of the oil pump
      Removal and flywheel installation / driving disk
      Replacement of a back epiploon of a cranked shaft
      Check of a condition and replacement of support of a suspension bracket of the power unit
   + DOHC Engines
   + General major maintenance of the engine
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ Control systems of the engine
+ Transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
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Removal and installation of heads of cylinders

Before starting to work, wait final cooling of the engine.

REMOVAL

 PERFORMANCE ORDER

1. Empty cooling system, including the engine block, (see. Head of Control and routine maintenance). Remove a gas-distributing belt, cogwheels of a drive of GRM and a back cover of a belt (see. Section Removal and installation of a gas-distributing belt and cogwheels of a drive of GRM). Also turn out bolts of fastening of tubes of an okhladitelny path to a back part of each of heads of cylinders (from transmission) on face plates of camshafts.
2. Remove the inlet pipeline (see. The section Removal and installation of the inlet pipeline) also take aside injection injectors with the electroconducting connected to them.
3. Remove assemblies of yokes (see. The section Removal, check of a condition and installation of assembly of yokes) and pushers of valves (see. Section Removal and installation of camshafts and pushers of valves).
4. Remove final collectors (see. Section Removal and installation of final collectors).
5. Mark and disconnect all hoses and the wires passing from GRM turned towards a drive of the party of the power unit.


Forward head (from a radiator)

 PERFORMANCE ORDER

1. Turn out spark plugs, remove the distributor and the coil (see. Head engine Electric equipment).
2. Remove from the arm the compressor of the conditioner of air and take him aside, without disconnecting refrigerator lines (see. Head of System of cooling, heating). Tie up the compressor a wire so that hoses of refrigerator lines did not appear tense.

Access to the top bolts of fastening of the compressor opens only after assembly shift aside.

3. Remove a compressor and generator arm.
4. Remove a fastening arm to a head of cylinders of a directing tube measuring щупа.


Back head (from a partition of an impellent compartment)

 PERFORMANCE ORDER

Disconnect from the party of a head of cylinders turned to transmission hoses of a heating path and their arms.


Both heads

 PERFORMANCE ORDER

1. In stages (on 1/4 turns for an approach) weaken bolts of fastening of a head so that there was a possibility of their reversing manually. Act as it should be, the return shown on an illustration and having begun with the small bolt located from the outer side of a head.

2. Remove enclosed under heads of bolts of a washer. All bolts, except mentioned above the small are subject to replacement without fail.

Washers can be used repeatedly.

3. Remove a head of cylinders from the engine block. In case of need обстучите their hammer through wooden whetstone. If there will be a need for a poddevaniye of the "become attached" head the lever, try not to damage an interfaced surface.

INSTALLATION

 PERFORMANCE ORDER

1. Remove old laying of heads of cylinders. Interfaced surfaces of heads and the block should absolutely pure and dry.

2. Having scratched out the remains of a material build laying and coal deposits, wipe surfaces the rags moistened in acetone. Existence on interfaced surfaces of traces of oil at the moment of installation of a head can lead to violation of tightness of landing of laying and, as a result, development of leaks. Processing the block, закупорьте openings of cylinders rags in order to avoid hit in them small garbage and various extraneous subjects (as a last resort, carefully vacuum cylinders).
3. Check interfaced surfaces of heads and the block on existence of deep scratches, задиров and other damages. Easy defects can be eliminated by means of a fine-grained emery paper. In more serious cases the unique alternative is the pro-point of components, or their replacement.
4. A tap of the suitable size banish carving openings under bolts of fastening of heads. Having finished pro-race, blow openings the compressed air. Serially clamping bolts in a vice for a head, walk on their carving lerky, - existence in rounds of a carving of old hermetic, dirt and products of corrosion results in discrepancy of real effort of a tightening of fixture to indications of the indicator of a dinamometrichesky key.

At work with reaped air do not forget to put on goggles!

5. Lay new sealing laying, putting on them directing pins in the block.

6. Trying not to displace laying, accurately plant heads on the block.
7. Grease a carving and the bottom surfaces of heads of new fixing bolts with pure impellent oil. Screw fixture on the places and tighten bolts by hand.

Do not forget to enclose under heads of bolts of a washer. Washers keep within the equipped facet the party up and flat - to a head.

8. Operating in strictly certain order, tighten bolts of fastening of heads of cylinders with demanded effort (everything, except small external).

Bolts 4, 5, 12 and 13 are longer than the others!

9. Tighten small bolts (on one from the outer side of each of heads) with effort of 9 ÷ 12 Nanometers.
10. Further assembly is made as it should be the return to an order of dismantle of components.
11. Do not forget to fill system of cooling and to replace impellent oil and the oil filter (see. Head of Control and routine maintenance).
12. Start the engine and check it on existence of signs of leakages of oil and cooling liquid. Estimate correctness of installation of a corner of an advancing of ignition (see. Head of Control and routine maintenance).