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
   - DOHC 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
      Check and adjustment of gaps of valves
      Replacement of maslootrazhatelny caps and klapanny springs with plates
      Removal, check of a condition and installation of a chain and asterisks 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
   + 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, check of a condition and installation of a chain and asterisks of a drive of GRM

Scheme of a drive of GRM of DOHC engines

1 — the Back cover of a drive of GRM
2 — Natyazhitel
forward (left) secondary chain
3 — Top
the directing
4 — the Back (right) secondary chain
5 — Natyazhitel of a back (right) secondary chain
6 — Natyazhitel of the main chain
7 — Directing a sagging site of a chain
8 — the Main gas-distributing chain
9 — the Asterisk of a cranked shaft
10 — Bottom directing to the main chain
11 — Top directing to the main chain
12 — the Forward cover of a drive of GRM
13 — the Oil pump
14 — the Pulley of a cranked shaft
15 — the Cover of the water pump

16 — the Cover of access to a natyazhitel of a chain
17 — Asterisks of a secondary chain of final camshafts
18 — Asterisks of a secondary chain of inlet camshafts
19 — Asterisks of the main chain of inlet camshafts
20 — the Oil filter
21 — the Water pump
22 — Sealing rings
23 — the Stopper water plum
24 — the Stopper
25 — sealing rings
26 — the Sealing ring
27 — Sealing laying
28 — Consolidation
29 — the Forward epiploon of a cranked shaft


Before starting procedure performance, wait complete cooling of the engine.

REMOVAL

 PERFORMANCE ORDER

1. Disconnect a negative wire from the battery.

If the stereosystem established on the car is equipped with a security code before disconnecting the battery make sure that have the correct combination for audiosystem input in action!

2. Prop up back wheels of the car protivootkatny boots. Cock the parking brake.
3. Weaken nuts of fastening of the right forward wheel, then поддомкратьте a front of the car and establish it on props. Remove a wheel.
4. Remove protection of a case and a loker of protection of an arch of the right forward wheel.
5. Dump pressure in a power supply system (see. Head of the Power supply system and release). Empty cooling system (see. Head of Control and routine maintenance).
6. Remove the top section of the inlet pipeline (the delivery chamber) (see. The section Removal and installation of the inlet pipeline) and covers of heads of cylinders (see. Section Removal and installation of covers of heads of cylinders).
7. Turn out spark plugs (see. Head of Control and routine maintenance). Bring the piston of the first cylinder into the provision VMT of the end of a step of compression (see. The section Reduction of the piston of the first cylinder in the provision of the top dead point (VMT)).
8. Remove driving belts (see. Head of Control and routine maintenance) and arm of an intermediate roller.
9. Remove the steering pump with an arm (see. Head Suspension bracket and steering).
10. Remove the compressor of the conditioner of air (see. Head of System of cooling, heating).
11. Remove a pulley of a cranked shaft (see. Section Removal and installation of a pulley of a cranked shaft).

Do not allow a provorachivaniye of a cranked shaft in the course of pulley removal, - the engine should remain in position VMT of the piston of the first cylinder.

12. Disconnect electroconducting from the oxygen sensor, then separate a reception pipe of system of production of the fulfilled gases from final collectors and the catalytic converter (see. Head of the Power supply system and release).
13. Hang out the power unit from above on the winch or a beam.

Take care of reliability of fastening of the unit!

14. Turn out through bolts of lobbies and back support of a suspension bracket of the power unit and remove a cross-section beam from the car assembled with the support fixed on it (see. Section Check of a condition and replacement of support of a suspension bracket of the power unit).
15. Remove an arm of the To/in compressor both the top and bottom sections of the pallet of a case (see. Section Removal and installation of the pallet of a case of the engine).
16. At the top remove the right support of a suspension bracket of the unit (see. Section Check of a condition and replacement of support of a suspension bracket of the power unit).
17. Remove from a chain cover the sensor of provision of a camshaft (see. Head of the Control system of the engine).

18. Liberate an electroconducting plait from arms on the top cover of a gas-distributing chain. Operating as it should be the return shown on an illustration, turn out bolts of fastening of a forward cover. Pay attention that for fastening of a cover bolts of various standard sizes which at assembly should be established strictly on the former places are used, - in case of need make the corresponding marking.

19. On considered engines (DOHC, 3.0 l) the demanded gazoraspredeleniye is provided with means of three chains. The main chain is put on asterisks of a cranked shaft, the water pump and two inlet camshafts and serves for reduction of functioning of the klapanny mechanism in phase compliance with rotation of a cranked shaft and movement of piston groups. Two secondary gas-distributing chains are put on separate asterisks of inlet camshafts and an asterisk of final shaft and serve for synchronization of a drive of inlet and final valves. Remove a forward cover of a gas-distributing chain and once again make sure that the piston of the first cylinder is in the provision VMT of the end of a step of compression on correctness of an arrangement of adjusting labels on asterisks distributive and cranked shaft of rather color links of a chain.

20. For weakening of a tension of the main gas-distributing chain remove it a natyazhitel, and also his lever / directing to a chain.

21. Turn out bolts of fastening top directing to a chain and bolts of asterisks of the main chain of inlet camshafts.

22. Remove asterisks of the main chain from pins of inlet camshafts.

At installation of an asterisk should be planted on the former shaft, - put the corresponding marking.

23. Wring out natyazhitel of secondary chains and block them by introduction of lock pins in specially provided openings.

24. Turn out bolts of fastening of asterisks of secondary chains of final camshafts. Make sure of correctness of combination of adjusting labels, then remove both secondary chains with asterisks.

Asterisks of secondary chains of inlet and final camshafts differ from each other on thickness and at assembly should be established strictly on the former places, - put the corresponding marking.

25. Remove an asterisk of a cranked shaft and bottom directing to the main chain.

CHECK

 PERFORMANCE ORDER

Examine asterisks of camshafts, the water pump and a cranked shaft on existence of signs of wear of teeths and shponochny grooves, chains - on existence of cracks and signs of wear of rollers. Estimate a condition of working surfaces of directing chains.

For ensuring access to bolts of fastening of a directing secondary chain a neck of the corresponding camshaft [the cover of the corresponding bearings of camshafts] should be taken from the head for the purpose of ensuring access to fixing bolts.

INSTALLATION

 PERFORMANCE ORDER

1. Establish into place an asterisk of a cranked shaft and bottom directing to the main chain (a label up).

2. Make sure of compliance of a standard size of the prepared new chains to requirements of the engine of your car, - compare them to the old. Make sure of compliance of an arrangement of color links.
3. If natyazhitel of secondary chains acted in film, establish them on the places, having tracked correctness of fixing of springs. Plant on pins of camshafts of assembly of secondary chains with asterisks, - will track correctness of combination the adjusting meta. Tighten with demanded effort bolts of fastening of asterisks of final shaft.
4. Take lock pins from assemblies of natyazhitel of secondary chains.
5. The correct image having arranged color links concerning labels on asterisks, prepare for installation the main gas-distributing chain.
6. Having thrown with a chain asterisks of a cranked shaft and the water pump, establish it assembled with remained asterisks on the engine. Track correctness of combination of a light link of a chain with a label on an asterisk of a cranked shaft.
7. Establish top directing to the main chain.
8. Establish the lever of a natyazhitel of the main chain / directing to a chain. Make sure that the piston of the first cylinder still is in the provision VMT of the end of a step of compression, and color links of a chain are not brought down concerning labels on asterisks.
9. Remove all traces of old hermetic from a forward cover of a drive of GRM and bolts of its fastening.
10. Impose on a cover fresh RTV hermetic. Establish a cover on the engine, screw fixing bolts on the former places. Moving in strictly certain order, tighten fixture with demanded effort.

11. Further installation is made as it should be the return to an order of dismantle of components.