5.8.3. Replacement of oil scraper caps
External sign of wear of oil scraper caps is short-term emergence of blue smoke from an exhaust pipe after launch of the engine and when braking by the engine after the long movement under loading. At the same time constant smoking usually is not observed. Indirect signs — the increased oil consumption in the absence of external leaks and greasy electrodes of spark plugs.
It is possible to replace oil scraper caps, without removing a head of the block of cylinders from the engine, but it is very labor-consuming and for this purpose it is necessary to have certain skills.
Therefore we recommend to replace oil scraper caps on the removed block head.
It will be required to you: all tools necessary for removal of a head of the block of cylinders (see. "Replacement of laying of a head of the block of cylinders"), tweezers for extraction of crackers from plates of springs of valves...
... device for compression of springs of valves...
... and device for removal and installation of oil scraper caps.
1. Remove a head of the block of cylinders (see. "Replacement of laying of a head of the block of cylinders").
2. Remove yokes (see. "Replacement of hydrocompensators of gaps in the mechanism of the drive of valves").
3. Install the device for compression of springs of valves on a block head, having fixed it for the nut screwed on a hairpin of fastening of a yoke as shown in a photo.
4. Establish a support under the "rassukharivayemy" valve, squeeze a spring and take out from a plate springs crackers.
7. Special adaptation remove an oil scraper cap.
8. Oil an internal surface of an oil scraper cap engine, advance a cap on a valve core to the directing plug and pressing of fingers put on a cap the plug against the stop.
Establish new oil scraper caps only by hands without application of a mandrel. The attempt to napressovat a cap through a mandrel the hammer inevitably will lead to its damage.
9. Establish a spring and a plate of the valve as it should be, the return to removal. Establish crackers by means of adaptation so that they rose in valve core pro-points. After installation of crackers strike with the hammer through a metal core a valve end face that crackers sat down on the place.
If the crackers established with a distortion remain unrecorded, then at launch of the rassukharivshiysya engine the valve will fail in the cylinder that will lead to serious failure of the engine.
10. Similarly replace oil scraper caps of other valves.
11. Install a head of the block of cylinders on the engine (see. "Replacement of laying of a head of the block of cylinders").
Surely replace laying of a head of the block of cylinders new.
12. Establish all earlier removed details of the gas-distributing mechanism (see. "Replacement of a tension of a belt of the drive of the gas-distributing mechanism and its tension roller").
13. Adjust a tension of belts of the drive of the generator and compressor of the conditioner (see. "Check of a tension of a belt of the drive of the generator and compressor of the conditioner"), and also the pump of the hydraulic booster of steering (see. "Check and adjustment of a tension of a belt of the drive of the pump of the hydraulic booster of steering").