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Checking the pistons, piston rings and cylinder bore
| Fig. 2.89. Connecting rod and piston group 1 - the piston rings; 2 - piston; 3 - a lock ring; 4 - the connecting rod; 5 - bearing; 6 - a cover of a rod; 7 - a bolt 30 Nm + tighten 1/4 turn (90 ?�); 8 - cylinder block; 9 - piston pin
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Checking the thermal gap of piston rings
| Fig. 2.90. Checking the thermal gap of piston rings
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Will drive the top ring, at right angles to the cylinder wall to the bottom of the cylinder bore at a distance of about 15 mm from its edge. To do this, use the piston without rings (Fig. 2.90).
Checking piston ring gap height
Check the diameter of the cylinder
| Fig. 2.92. Measure the diameter of the piston
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Measure approximately 6 mm from the bottom edge, perpendicular to the piston pin axis (Fig. 2.92). The maximum permissible deviation from the nominal size of 0.04 mm
| Fig. 2.93. The circuit measuring the diameter of the cylinder
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Swipe crosswise measurements at three locations in the transverse direction A and a longitudinal direction B (Fig. 2.93). The maximum permissible deviation from the nominal size of 0.08 mm.
NOTE It is forbidden to measure the diameter of the cylinder when the cylinder block is fixed to the retainer engine and gearbox VAS 6095, because in such a case may be incorrect results. |
Dimensions of pistons and cylinders
Installation of pistons via funnel T10147 Only then can install pistons rings.
NOTE When used to install a new piston funnel T10147 first need to spend double piston with oiled piston rings through it and, if necessary, remove the chips appeared (Fig. 2.94). |
Manually push the piston into a greased funnel T10147. The flat side of the piston crown must point to a pin of the crater (Fig. 2. 95). Hold the funnel (with piston inserted into it) to the top end, push the plunger in, pushing his thumbs of both hands. Push the plunger so that it extends above the lower edge of the funnel about 15 mm.
| Fig. 2.95. The scheme of installation of special funnel T10147
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Place piston in the corresponding cylinder. Zapf funnel (Fig. 2.95) should be towards the middle of the cylinder. Place the funnel on the cylinder block and push the piston inside.
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