General information
Four-stroke, four-cylinder, in-line gasoline engine with a transverse arrangement in the front of the car.
Main technical characteristics
Cylinder head
The cylinder head is cast from aluminum alloy. The head has multi-sphere combustion chambers. The valve seats and valve guides are plug-in. In the upper part of the cylinder head there are three bearings for the camshaft journals. The supports are detachable. The upper half is in the bearing housings, and the lower half is pressed into the cylinder head. The bearing holes are machined complete with the bearing housings, so they are not interchangeable.
The height of the cylinder head when measured between the planes of the connector, mm: 90.5.
Reducing the height of the cylinder head during grinding, mm: 0.20.
Non-flatness of the surface of the cylinder head adjacent to the block, mm: 0.15.
Valves
The valves are located in the cylinder head in a V-shape. The valves are actuated by the camshaft cams via rocker arms.
Valve specifications
Valve clearances: The normal clearance between the end of the tip of the rocker adjusting screw and the end of the valve stem, measured with a feeler gauge on a hot engine, is 0.25 mm for inlet valves and 0.30 mm for exhaust valves.
Valve seats
Valve seats are cast iron, plug-in.
Chamfer angle: 45°.
Working chamfer width, mm: 1.4.
When pressing the valve seats into the cylinder head seats, the end of the valve stem relative to the bearing surface of the valve spring must protrude by 42.4 mm (maximum allowable value 43.9 mm).
Valve guides
Inner diameter, mm: 8.063-8.083.
Valve springs
Each intake and exhaust valve is equipped with one spring with the same characteristics.
Free length, mm: 43.3.
Maximum length in the upset state, mm: 42.0.