S-class W202 Mercedes

1993-2000 of release

Repair and car operation



W202 Mercedes
+ 1.2. General information
+ 2. Maintenance
- 3. Engines
   3.1.2. Identification number
   + 3.1.3. Engine
   3.1.4. Cars with the conditioner
   3.1.5. Bottom cover of a motor compartment
   3.1.6. Covers of cast openings
   3.1.7. Natyazhitel of a chain
   + 3.1.8. Cover of a head of the block of cylinders
   + 3.1.9. Head of the block of cylinders
   + 3.1.10. Camshafts
   3.1.11. Hydraulic tarelchaty pushers
   3.1.12. Maslootrazhatelnye caps
   3.1.13. Valves
   3.1.14. Directing valves
   3.1.15. Saddles of valves in a head of the block of cylinders
   3.1.16. Compression
   + 3.1.17. Klinovy belt
   3.1.18. Diagnostics of malfunctions (DB)
   3.1.19. General comments
   3.1.20. Repair work without engine dismantle
   + 3.1.21. Major maintenance of the engine
   + 3.2. Diesel engine (DD)
   3.2.3. Cars with the conditioner
   3.2.4. Bottom cover of a motor compartment
   3.2.5. Covers of cast openings
   3.2.6. Natyazhitel of a chain
   + 3.2.7. Camshaft
   + 3.2.8. Head of the block of cylinders
   + 3.2.9. Maslootrazhatelnye caps
   3.2.10. Cover of a head of the block of cylinders (2,2/2,5 l)
   3.2.11. Hydraulic tarelchaty pushers
   3.2.12. Valves
   3.2.13. Directing valves
   3.2.14. Saddles of valves in a head of the block of cylinders
   3.2.15. Head of the block of cylinders and motor block
   3.2.16. Compression
   3.2.17. Maple ridge belt
   3.2.18. Tense device of a maple ridge belt
   3.2.19. Diagnostics of malfunctions (DD)
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes








b47c026d b47c026d


3.2.12. Valves

GENERAL INFORMATION

Engine in volume of 2,0 l

 

Prevention

If details of management are used by the valve again, it is necessary to establish them on former places. To avoid confusion of details, make the panel for their storage.


Removal

PERFORMANCE ORDER
1. Remove a head of the block of cylinders and put on wooden levels so that valves were supported from below.
2. Remove maslootrazhatelny caps.
3. Cast away aside a head of the block of cylinders and take valves from the directing.
4. Clean valves.
5. With the burned-through plates, with too small height (h) of a plate of the valve, the worn-out or scratched cores it is necessary to replace valves. Limiting value (h) see in the table the Sizes of valves.
6. The repair shop can check a valve core on palpation and make completion of a corner of a basic surface of the valve. Maximum palpation of a core of the valve and valve saddle: 0,03 mm.

Prevention

At any operations on processing of valves it is necessary to mean that the corner of a plate of the valve makes and = 45 ° + 15 °.

Instruction: the core and a valve rod for engines in volume of 2,2/2,5 l have 3 ring bores.

Installation


PERFORMANCE ORDER
1. Before installation of the valve check directing the valve and, if necessary, finish a valve saddle.
2. Smooth out a valve core in a place of a prileganiye of details of a rod.
3. Slightly grease a core of the valve and directing the valve with engine oil and establish the valve.
4. Establish new maslootrazhatelny caps.
5. Establish a valve spring.
6. Establish all other valves, do not mix inlet and final valves.
7. Establish a tarelchaty pusher.
8. Establish a head of the block of cylinders.

Sizes of valves
INLET VALVE (195)
FINAL VALVE (196)
Engines in volume of 2,0 l
D= 37,9-38,1 mm
D= 34,9-35,1 mm
D1 = 7,97 – 7,955 mm
D1 = 8,960 – 8,945 mm
L= 106,4 mm
L= 106,4 mm
h (new) = 1,75 – 2,05 mm
h (new) = 1,75 – 2,05 mm
h (предельн.) = 1,6 mm
h (предельн.) = 1,6 mm
Engines in volume of 2,2/2,5 l
D= 29 mm
D= 26 mm
D1 = 6 mm
D1 = 6 mm