3.1.24. Cleaning and survey of a head of the block of cylinders
Prevention
The final valves installed on the engine 20 XEJ and C20 XE (DOHC) contain sodium which is used for increase in a thermolysis. Sodium is a highly active metal which can ignite or explode at contact with water or water vapor.
Replacement of a sealing ring of a casing of the thermostat on the engine of 2,0 l
Arrangement of the unilateral valve of pressure of oil (1) and stopper (2) on the engine of 2,0 l
| PERFORMANCE ORDER |
| 1. Remove the remains of old laying from a head of the block of cylinders. |
| 2. Clear a deposit from combustion chambers, then wash up a head in the corresponding solvent. |
| 3. Clear of carbonaceous deposits of the valve, it is possible even with application of a wire brush. |
| 4. Carefully examine a head of the block of cylinders on existence of cracks and other damages. In the presence of cracks the head is subject to replacement. |
| 5. Using a metal ruler and the probe, check planeness of the interfaced surface of a head of the block of cylinders. At not planeness of more than 0,1 mm it is necessary to pereshlifovat a head, at the same time its height has to conform to requirements. |
| 6. Check a condition of saddles of valves. If they are burned, worn-out or have defects, they need to be replaced. If wear of a saddle of the valve is insignificant, they need to be ground in. Check the directing plugs of valves for wear, inserting into them a core of the valve and moving it aside. Movement has to be insignificant. If movement is excessive, take the valve and measure diameter of a core of the valve. If necessary replace the valve. If the core of the valve is not worn-out, so the directing plug which needs to be replaced is worn-out. Replacement of the directing plugs of valves should be made at service station. |
| 7. If saddles of valves have to be pereshlifovana, this operation needs to be executed after installation of new guides of valves. |
| 8. On engines 1,8 and 2,0 of l replace the sealing ring located between a head of the block of cylinders and a casing of the thermostat (see rice. Replacement of a sealing ring of a casing of the thermostat on the engine of 2,0 l). |
| 9. For replacement of the unilateral valve of pressure of oil (1) in a head of the block of cylinders unscrew a round stopper (2) and take the valve from a head of the block of cylinders. Install the new valve into place and screw up a stopper (see rice. An arrangement of the unilateral valve of pressure of oil (1) and a stopper (2) on the engine of 2,0 l). |
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