| 1. Interfaced surfaces of a head and the block of cylinders should be absolutely pure. For their cleaning use a firm plastic or wooden scraper. When cleaning be careful, as the aluminum alloy is very easy for damaging. Check, that the deposit did not get to oil and water canals. It is especially important for greasing system as the deposit can block supply of oil to engine components. If necessary clear channels, check interfaced surfaces of a head and the block of cylinders on existence of notches, deep scratches and other damages. If defects small, they can be removed with machining. At major defects of a detail are subject to replacement. |
| 2. Using a metal ruler and щуп, check planeness of interfaced surfaces. |
| 3. Clear openings under bolts in the block of cylinders. Bolt screwing up in the openings filled with oil can break off the block because of hydraulic pressure. |
| 4. Measure length of bolts from the head basis (see drawing). If the length of a bolt exceeds admissible limits, replace all bolts in a set. |
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