Attention: before installing a new gasket, clean and degrease the surfaces of the cylinder head and cylinder block. Make sure there are no foreign objects (remnants of the old gasket, oil and coolant) in the channels of lubrication, cooling and cylinders.
Attention: if the surfaces of the cylinder head or block were ground, as well as in the case of replacing the cylinder head, cylinder block or elements of the connecting rod and piston group (including when grinding the crankshaft) it is necessary to select the thickness of the new gasket by checking the amount of protrusion of the pistons above the plane of the surface of the cylinder block.
Replacing the old gasket with a new one (without repair work), determine the size group, based on its marking, in accordance with the given data.
Size group | Gasket thickness | Catalog number |
A | D5-205 (0,95±0,04) mm | 1005A205 |
IN | D5-206 (1,00±0,04) mm | 1005A206 |
WITH | D5-207 (1,05±0,04) mm | 1005A207 |
Installing a new gasket (after repair work), determine the size group (gasket thickness), by measuring the protrusion of the pistons above the plane of the cylinder block.
Method for measuring piston protrusion
Measurements are made at the points indicated in the figure. The measuring points are located on the axis of the cylinder block. When measuring, the corresponding piston must be in the TDC position.
After determining the average value from the measurement results at eight points, select the gasket thickness based on the data given in the table. If any piston exceeds the value for the selected size group, select a gasket one size thicker.
Note: If any piston protrusion exceeds the limit, replace the connecting rod, piston, crankshaft or cylinder block and repeat the test.
Size group | Average piston protrusion | Maximum piston protrusion | Thickness of the gasket after tightening the cylinder head screws | Identification label |
A | 0.06-0.12mm | 0.17 mm | 0.95±0.04 mm | D5-205 |
IN | 0.12-0.18mm | 0.23 mm | 1.00±0.04mm | D5-206 |
WITH | 0.18-0.24mm | - | 1.05±0.04mm | D5-207 |