| 1. Check that the deposit did not get to oil and water canals. It is especially important for the lubrication system as the deposit can block supply of oil to engine components. If necessary clear channels. |
| 2. Check the interfaced surfaces of a head and the block of cylinders for existence of notches, deep scratches and other damages. If defects small, they can be removed with machining. But at major defects of a detail are subject to replacement. |
| 3. Using a metal ruler and the probe, check planeness of the interfaced surfaces. |
| 4. Clear openings under bolts in the block. Screwing up of a bolt in the opening filled with oil can break off the block because of hydraulic pressure. |
| 5. Replace bolts of fastening of a head of the block of cylinders irrespective of their state. |
