Before installing the gasket, remove all oil from the mating surfaces of the block and cylinder head. The gasket must be clean and dry. Do not allow oil to get on the gasket surface. If oil gets on the gasket, degrease it.
Insert the pistons into the cylinders using the split sleeve 67.8125.9502 for compressing the piston rings.
Cylinder head mounting bolts may be reused only if the bolt shaft has stretched no more than 120 mm. If the bolt length is longer, replace it with a new one.
Before assembling the engine, lubricate the threads and bolt heads in advance by dipping them in engine oil. Then let the excess oil drain off, holding the bolts for at least 30 minutes. Remove oil from the bolt holes in the cylinder block.
Tighten the cylinder head mounting bolts in the sequence shown in Fig. 2-16 and in four steps:
- step 1: Tighten bolts 1-10 to 20 Nm (2 kgf·m);
- step 2: Tighten bolts 1-10 to 69.4-85.7 N·m (7.1-8.7 kgf·m) and bolt 11 to 31.36-39.1 N·m (3.2-3.99 kgf·m);
- 3rd premium - tighten bolts 1-10 by 90°;
- step 4: Tighten bolts 1-10 by 90° again.
Otherwise, the assembly of the 21213 engine is no different from the assembly of the 2121 engine.