S-class W202 Mercedes

1993-2000 of release

Repair and car operation

Defective sealing laying of a head of the block of cylinders is distinguished on the following signs:

 – capacity loss;
 – leakage of cooling liquid, exhaust gas of white color at the heated-up engine;
 – leakage of oil;
 – cooling liquid in engine oil, level of oil does not fall, and increases;
 – gray color of engine oil, foam shreds on masloizmeritelny щупе, oil liquid;
 – engine oil in cooling liquid;
 – cooling liquid strongly rages;
 – there is no compression in two next cylinders.

Removal

PERFORMANCE ORDER

1. Raise an engine cowl. 2. Disconnect a wire of "weight" of the battery (–). Prevention At a detachment of the battery the anticreeping code of radio is erased. Instructions see in subsection 14.1.7. 3. Remove the case of a head of the block of cylinders. 4. Remove a temperature regulator cooling liquids (thermostat). 5. Turn off two bolts in diameter of 8 mm (1) from both parties of a forward covering (23). Behind a covering there are unloading plugs. 6. Unscrew bolts (2) (diameter of a carving of 6 mm). 7. Remove a covering (23), thus track a sealing ring of round section between a covering and a head of the block of cylinders. Clean sealing surfaces. 8. Unscrew the inlet gas pipeline (19) from a head of the block of cylinders and put aside with the connected wires. 9. Unscrew the holder (2) item sensors of the crankshaft, located behind a head of the block of cylinders. 10. Disconnect ventilating hoses (6) in the bottom of a head of the block of cylinders. 11. Disconnect the connection tip a lambda probe (in the field of the storage battery). 12. Unscrew directing tube masloizmeritelny щупа in a head of the block of cylinders. At an automatic transmission unscrew also directing tube of the maslomerny device behind a head of the block of cylinders. 13. Lower cooling liquid, including from a case of a cranked shaft. 14. Unscrew an exhaust pipe from a final collector. 15. Engine in volume of 2,2 l: turn a cam-shaft regulator to the right against the stop in the spat direction (late). 16. Establish the engine on 20 ° after VMT of ignition of the first cylinder and remove a natyazhitel of a chain. 17. Designate paint the provision of an operating chain in relation to both gear wheels of a cam-shaft, having put a stroke through a chain and a chain wheel. 18. Unscrew a pulley of a final cam-shaft from a flange of a cranked shaft. 19. Engine in volume of 2,0 l: unscrew a gear wheel of an inlet cam-shaft. 20. Engine in volume of 2,2 l: holding an anchor (2) regulators of a cam-shaft, unscrew a bolt with a fillet (1). Remove an anchor from the operating piston (18). Unscrew a nut (6). 21. Remove an operating chain. 22. Engine in volume of 2,2 l: designate the provision of a gear wheel of an inlet cam-shaft in relation to a shaft with a flange, having carried out paint a stroke through both details. Uncover (12), a gear wheel of an inlet cam-shaft (13), the adjusting piston (14) and a spherical spring (14а). Dismantle a shaft with a flange (16). 23. Extend by means of a shock vytyagivatel or the suitable tool directing fingers (11). 24. Unscrew four combined bolts (And) between the top and bottom cover of a case of a chain. Unscrew bolts of a head of the block of cylinders in sequence, their return numbering in drawing, i.e. from the tenth on the first. The nozzle on a wrench, for example, HAZET 990 SLg-12 (see fig. is for this purpose necessary. Bolts of a head of the block of cylinders). 25. Raise a head of the block of cylinders. It can be made also by means of the crane, having passed in eyes the corresponding cable or a chain.

Installation

PERFORMANCE ORDER

1. Before assembly clear a suitable shaber a head of the block of cylinders and the block of cylinders of the hermetic remains. Track, that these remains did not get to openings. For this purpose close openings a rag. 2. Check by means of a steel ruler a head of the block of cylinders and the motor block on planeness in the longitudinal and cross-section directions, if necessary – finish (in repair shop). 3. Check a head of the block of cylinders on lack of cracks, and a working surface of the cylinder on absence рисок, scratches. 4. Clear openings of bolts of a head of the block of cylinders of oil and other deposits. 5. Surely replace sealing laying of a head of the block of cylinders. 6. Impose new sealing laying without hermetic so that openings were not closed. 7. Establish a head of the block of cylinders. Before installation be convinced that camshafts and a cranked shaft stand, as at dismantle, and are not turned. Prevention The head of the block of cylinders is aligned in the block of cylinders by adjusting pins. 8. Measure length of bolts of a head of the block of cylinders which in a new condition makes 102 mm. At a tightening adhere to this length. At length of 105 mm replace bolts of a head of the block of cylinders. 9. Oil a carving of bolts of a head of the block of cylinders and a place of their prileganiye to a block head, establish bolts and twirl manually. 10. Tighten bolts of a head of the block of cylinders in sequence from 1 to 10 (see fig. Bolts of a head of the block of cylinders) in three stages. Prevention Carefully tighten bolts of a head of the block of cylinders. Before a tightening check a dinamometrichesky key on accuracy. At first tighten bolts of a head of cylinders a dinamometrichesky key consistently with 1 on 10 with the moment of 55 N of m. At the second stage all bolts with 1 on 10 tighten for 90 ° a rozhkovy key. At the third stage tighten bolts of a head of the block of cylinders with 1 on 10 on 90 ° in the same direction a rozhkovy key. Prevention At a tightening of bolts of a head of the block of cylinders arrange the wrench handle along the engine and turn one movement before its installation across – for turn on 90 °. 11. The combined bolts (And) covers of the case of management tighten with the moment of 20 N of m. 12. Cover directing fingers with Mercedes N 002 989 00 20 10 hermetic or other suitable hermetic and drive.