Cylinder block
Label R1 (A) engraved on the cylinder block and indicates the repair thickness.
After checking the cylinder block, it may be necessary to perform several operations listed below.
Checking the flatness and / or condition of the mating surface: grinding the mating surface to a depth of 0.20 mm; operation requires oversize 1 or 2 cylinder head gaskets (this is also necessary after grinding the connecting surface of the cylinder head) (see chapter «cylinder head (petrol engines 1.4 and 1.6 l)».
Checking the wear and / or condition of the liners and reboring them (if necessary) (see chapter «Piston characteristics (petrol engines 1.4 and 1.6 l)».
Sleeve honing
After boring the sleeves, honing them, taking into account the features described below.
Places for measuring protrusion (bearing capacity) marked with a letter (E).
- F - 10 mm.
- G - 65 mm.
- H - 125 mm.
- α — 50° ± 5°.
Protrusion value
To implement the following measures, observe the locations (E): radius maximum -15.
Protrusion measurement
Measuring length with feeler gauge: 16 mm.
Three measurements for each sleeve from the side against which the piston is pressed by the action of gases (oil filter side), or 12 measurements for the entire cylinder block.
Two overhangs are allowed unless they are defined on the same case.
In this case, seven additional measurements can be taken on the suspicious sleeve and used if the permitted protrusion is not exceeded.
Shape and Position Tolerance:
K - straightness;
L - compliance with the norm of the shape of the cylinder.
Measuring the geometry of cylinder liners
α value: 60°.
Measure the diameters V - X - Y - Z for each size F - G - H.
78.5 mm <- VXYZ <- 78.518 mm.
The maximum allowable spread between the results of 12 measurements: 0.018 mm.
Tightening torques
Nominal thickness (A): 265.23 mm. The bolt for fastening the covers / beds of the crankshaft main journals is indicated by a number (1).
Attention. Follow the correct order of tightening the threaded connections, install new bolts. Do not lubricate when reassembling.