4.2. Removal of the engine from the car and capital repairs of the engine
Specifications
Head of cylinders
Height (new head): | |
Models till 1993 of the issue. | 140.5 ± 0.1 mm |
Models since 1994 of the issue. | 139.4 - 139.6 mm |
Height (new head): |
|
Height (minimum): | |
Models till 1993 of the issue. | 140.1 mm |
Models since 1994 of the issue. | 139.0 mm |
Valve rod side play in the directing plug (maximum) |
0.50 mm (measurement is performed at the head of the valve raised over a saddle by 3 mm) |
Valves
Diameter of a plate of the valve: |
|
Inlet valve | 33.0 mm |
Final valve | 29.0 mm |
Angle of processing of a facet of the valve (only for inlet valves) |
44.34 ° - 44.67 ° |
Valve saddle facet corner | 45 ° |
Diameter of a rod of the valve: |
|
Inlet valve | 6.960 - 6.975 mm |
Final valve | 6.965 - 6.980 mm |
Free length of a valvate spring | 45.5 ± 1.5 mm |
The end face of a rod of the valve is lower than the surface of the bearing of a cam-shaft on: |
|
When checking | 19.5 ± 0.05 mm min. - 20.5 ± 0.05 mm max. |
At installation | 20.0 mm min. - 20.4 mm max. (20.2 mm of number.) |
Block of cylinders
Diameter of cylinders: |
|
B202 engines: |
|
Nominal (A) | 90.000 - 90.010 mm |
Nominal (B) | 90.010 - 90.020 mm |
With excess, | 1 90.500 mm |
With excess, | 2 91.000 mm |
B204 and B234 engines: |
|
Nominal (A) | 90.000 - 90.012 mm |
Nominal (B) | 90.003 - 90.020 mm |
Nominal (In +) | 90.011 - 90.030 mm |
With excess, | 1 90.500 - 90.512 mm |
With excess, | 2 91.000 - 91.012 mm |
Balancing shaft
Longitudinal side play | 0.050 - 0.450 mm |
Diameter of a neck: | |
Bigger, internal |
39.900 ± 0.008 mm |
Smaller, external | 9.947 - 19.960 mm |
Diameter of bearings: | |
Bigger, internal | 39.988 - 40.043 mm |
Smaller, external | 20.000 - 20.021 mm |
Radial gap of bearings (max.) | 0.080 - 0.151 mm |
Pistons
|
Measurement of diameter of the piston is performed at the correct coal in relation to a piston lug, and at a certain distance from bottom edge of a skirt of the piston. |
Distance from bottom edge of a skirt |
|
B202 | 1 6.00 mm |
B234, models till 1993 of the issue. | 9.0 mm |
B234L/S, B234L/R/E, models since 1994 of the issue. | 9.3 mm |
B204i and B234i, models since 1994 of the issue. | 11.0 mm |
Diameter of pistons: |
|
B202I: |
|
Nominal A |
89.971 - 89.980 mm |
Nominal AB |
9.980 - 89.989 mm |
Nominal In |
89.989 - 90.000 mm |
Nominal With |
90.000 - 90.008 mm |
With excess 1 (0.5 mm) |
90.470 - 90.485 mm |
With excess 2 (1.0 mm) |
90.970 - 90.985 mm |
Nominal piston gap (for new pistons) | 0.010 - 0.039 mm |
B202 of Turbo and B202S: |
|
Nominal A |
89.967 - 89.977 mm |
Nominal | AB of 89.977 - 89.985 mm |
Nominal B | 89.985 - 89.993 mm |
Nominal With | 89.993 - 90.009 mm |
With excess 1 (0.5 mm) | 90.470 - 90.485 mm |
With excess 2 (1.0 mm) | 90.970 - 90.985 mm |
Nominal gap of pistons (new) | 0.015 - 0.043 mm |
B204 and B234: |
|
Nominal A | 89.971 - 89.980 mm |
Nominal AB | 89.980 - 89.989 mm |
Nominal B: | |
B234i till 1993 of the issue. | 89.989 - 90.000 mm |
B204/B234 since 1994 of the issue. | 89.989 - 90.000 mm |
Turbo B234 till 1993 of the issue. | 89.989 - 89.997 mm |
Nominal C | |
B234i till 1993 of the issue. |
90.000 - 90.013 mm |
B204/B234 since 1994 of the issue. | 90.000 - 90.013 mm |
Turbo B234 till 1993 of the issue. | 89.997 - 90.013 mm |
With excess 1 (0.5 mm) | 90.482 - 90.488 mm |
With excess 2 (1.0 mm) | 90.972 - 90.988 mm |
Nominal gap of the piston (new): | |
Models till 1993 of the issue. |
0.006 - 0.041 mm |
Models since 1994 of the issue. | 0.011 - 0.041 mm |
Rods
The maximum difference in scales of any two rods: |
|
B202 |
9.0 |
B204/B234 | 6.0 |
Crankshaft
Longitudinal side play (for all engines) | 0.06 - 0.31 mm |
Diameter of necks of radical bearings: |
|
Nominal | 57.981 - 58.000 mm |
With excess | 1 57.731 - 57.750 mm |
With excess | 2 57.481 - 57.500 mm |
With excess | 3 57.237 - 57.250 mm |
With excess | 4 56.987 - 57.000 mm |
Diameter of conrod necks: |
|
Nominal | 51.981 - 52.000 mm |
With excess | 1 51.731 - 51.750 mm |
With excess | 2 51.481 - 51.500 mm |
With excess | 3 51.237 - 51.250 mm |
With excess | 4 50.987 - 51.000 mm |
The most admissible ellipsoidnost of necks of bearings (for all engines): |
|
New |
0.005 mm |
Worker | 0.050 mm |
Radial gap of radical bearings: |
|
B202 | 0.020 - 0.062 mm |
Issue B204/B234 till 1993. | the issue 0.020 - 0.062 mm |
B204/B234 since 1994 of the issue. | 0.014 - 0.062 mm |
Radial gap of bearings of the lower head of a rod: |
|
Till 1993 issue. |
0.026 - 0.062 mm |
Since 1994 issue. | 0.020 - 0.068 mm |
Piston rings
Gaps in locks: |
|
Top compression ring: |
|
B202 |
0.35 - 0.48 mm |
B204/B234 | 0.30 - 0.50 mm |
Second compression ring: |
|
B202 | 0.25 - 0.38 mm |
B234 till 1993 of the issue. | 0.30 - 0.45 mm |
B204/B234 since 1994 of the issue. | 0.15 - 0.65 mm |
Oil scraper ring (can be segmentary) | 0.38 - 1.40 mm |
Side gap in a ring flute: |
|
Top compression ring: |
|
All engines of 0.050 - 0.082 mm | |
Second compression ring: |
|
Till 1993 issue. | 0.034 - 0.070 mm |
Since 1994 issue. | 0.040 - 0.072 mm |
Oil scraper ring | It is not regulated |
Efforts of tightening of threaded connections
Address Specifications in the Head Remont of the engine.