{"id":2343,"date":"2023-11-08T19:49:56","date_gmt":"2023-11-08T19:49:56","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=2343"},"modified":"2023-11-08T19:49:56","modified_gmt":"2023-11-08T19:49:56","slug":"removal-and-installation-of-piston","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/08\/removal-and-installation-of-piston\/","title":{"rendered":"Removal and installation of piston"},"content":{"rendered":"

 <\/p>\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
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03\u2014316 Removal and installation of piston<\/div>\n<\/div>\n<\/td>\n
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<\/div>\n<\/div>\n

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<\/td>\n<\/tr>\n
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Association piston \u2014 cylinder1<\/sup> <\/strong>)<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
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<\/div>\n<\/div>\n

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<\/td>\n<\/tr>\n
<\/td>\n\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Group number<\/div>\n<\/div>\n<\/td>\n
\n
<\/div>\n

 <\/td>\n

\n
\n
0<\/div>\n<\/div>\n<\/td>\n
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1<\/div>\n<\/div>\n<\/td>\n
\n
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2<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Standard dimension<\/div>\n<\/div>\n<\/td>\n
\n
\n
Piston dia Cylinder dia<\/div>\n<\/div>\n<\/td>\n
\n
\n
85.970-85.982 85.998-86.008<\/div>\n<\/div>\n<\/td>\n
\n
\n
85.980-85.992 86.009-86.018<\/div>\n<\/div>\n<\/td>\n
\n
\n
85.990-86.002 86.019-86.028<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
1st repair stage + 0.5<\/div>\n<\/div>\n<\/td>\n
\n
\n
Piston dia Cylinder dia<\/div>\n<\/div>\n<\/td>\n
\n
\n
86.470-86.482 86.498-86.508<\/div>\n<\/div>\n<\/td>\n
\n
\n
86.480-86.492 86.509-86.518<\/div>\n<\/div>\n<\/td>\n
\n
\n
86.490-86.502 86.519-86.528<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
2nd repair stage + 1.0<\/div>\n<\/div>\n<\/td>\n
\n
\n
Piston dia Cylinder dia<\/div>\n<\/div>\n<\/td>\n
\n
\n
86.970-86.982 86.998-86.008<\/div>\n<\/div>\n<\/td>\n
\n
\n
86.980-86.992 87.009-87.018<\/div>\n<\/div>\n<\/td>\n
\n
\n
86.990-86.002 87.019-87.028<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
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<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
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The smallest measured cylinder dia and the largest measured piston dia are decisive for association.<\/div>\n<\/div>\n<\/td>\n
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<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
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Piston code number and piston distance<\/strong><\/div>\n<\/div>\n<\/td>\n
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<\/div>\n<\/div>\n

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<\/td>\n<\/tr>\n
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Engine<\/div>\n<\/div>\n<\/td>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Compression<\/div>\n<\/div>\n<\/td>\n
\n
\n
Piston code<\/div>\n<\/div>\n<\/td>\n
\n
\n
Distance between piston crown<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
ratio<\/div>\n<\/div>\n<\/td>\n
\n
\n
number<\/div>\n<\/div>\n<\/td>\n
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and cylinder crankcase parting<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
e : 1<\/div>\n<\/div>\n<\/td>\n
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<\/div>\n

 <\/td>\n

\n
\n
surface<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Normal compression<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
110.921 110.922 110.923 110.924 110.981 110.982<\/div>\n<\/div>\n<\/td>\n
\n
\n
110.983 110.984 110.985 110.986 110.987<\/div>\n<\/div>\n<\/td>\n
\n
\n
Std<\/div>\n<\/div>\n<\/td>\n
\n
\n
37, 40, 50, 60, 64, 69 80M.83, 86′),89<\/div>\n<\/div>\n<\/td>\n
\n
\n
Standback 0.20 to 0.70<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
9.0\u00b10.2 8.7 \u00b10.2<\/div>\n<\/div>\n<\/td>\n
\n
\n
+ 0.5<\/div>\n<\/div>\n<\/td>\n
\n
\n
38,\u00a0 41, 51, 67, 70, 84,90<\/div>\n
39,\u00a0 42, 52, 68, 71, 85, 91<\/div>\n<\/div>\n<\/td>\n
\n
\n
Standback 1.0 to 1.50<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
+ 1.0<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Low compression<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
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<\/div>\n<\/div>\n

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<\/td>\n<\/tr>\n
<\/td>\n\n
\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
110.921<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n
\n
\n
10.984<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
110.922<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n
\n
\n
10.985<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
110.923<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n
\n
\n
10.991<\/strong><\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
110.924<\/div>\n<\/div>\n<\/td>\n
\n
<\/div>\n

 <\/td>\n

\n
<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
110.931<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n
\n
\n
10.992<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
110.932<\/div>\n<\/div>\n<\/td>\n
\n
\n
1<\/div>\n<\/div>\n<\/td>\n
\n
\n
10.993<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/td>\n\n
\n
8.0-0.4<\/div>\n<\/div>\n<\/td>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Std<\/div>\n<\/div>\n<\/td>\n
\n
<\/div>\n

 <\/td>\n

\n
\n
28,<\/div>\n<\/div>\n<\/td>\n
\n
\n
54,<\/div>\n<\/div>\n<\/td>\n
\n
\n
72,<\/div>\n<\/div>\n<\/td>\n
\n
\n
75<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
+ 0.<\/div>\n<\/div>\n<\/td>\n
\n
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5<\/div>\n<\/div>\n<\/td>\n
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29,<\/div>\n<\/div>\n<\/td>\n
\n
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55,<\/strong><\/div>\n<\/div>\n<\/td>\n
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73,<\/div>\n<\/div>\n<\/td>\n
\n
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76<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
+ 1.<\/div>\n<\/div>\n<\/td>\n
\n
\n
0<\/div>\n<\/div>\n<\/td>\n
\n
\n
30,<\/div>\n<\/div>\n<\/td>\n
\n
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56,<\/strong><\/div>\n<\/div>\n<\/td>\n
\n
\n
74,<\/div>\n<\/div>\n<\/td>\n
\n
\n
77<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/td>\n\n
\n
0.25 standout up to 0.15 standback<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Standback 0.55 to 0.95<\/div>\n<\/div>\n<\/td>\n
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\n
<\/div>\n<\/div>\n

 <\/td>\n

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<\/td>\n\n
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1<\/sup> ) Installed in engine 110.984, 110.985, 110.986 and 110.987 as standard equipment. Not available as repair stages. Use only together with piston of same piston code number.<\/div>\n<\/div>\n<\/td>\n
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\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
03.2-316\/1 F3<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Test values<\/strong><\/div>\n<\/div>\n<\/td>\n
\n
\n
New\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Wear limit<\/div>\n
(Installation tolerance)<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

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<\/td>\n<\/tr>\n
<\/td>\n\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Piston clearance<\/div>\n<\/div>\n<\/td>\n
\n
\n
0.016 <\/strong>to 0.040<\/strong><\/div>\n<\/div>\n<\/td>\n
\n
\n
0.08<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Difference in weight of pistons in one engine<\/div>\n<\/div>\n<\/td>\n
\n
\n
4g<\/div>\n<\/div>\n<\/td>\n
\n
\n
10 g<\/strong><\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Piston pin dia.<\/div>\n<\/div>\n<\/td>\n
\n
\n
22.996 to 23.00<\/div>\n<\/div>\n<\/td>\n
\n
<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Piston pin clearance<\/div>\n<\/div>\n<\/td>\n
\n
\n
in conrod bushing<\/div>\n<\/div>\n<\/td>\n
\n
\n
0.007 to 0.017<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
in piston<\/div>\n<\/div>\n<\/td>\n
\n
\n
0.002 to 0.011<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Piston ring gap<\/div>\n<\/div>\n<\/td>\n
\n
\n
groove 1 groove 2 groove 3<\/div>\n<\/div>\n<\/td>\n
\n
\n
0.30 to 0.45 0.30 to 0.45 0.25 to 0.40<\/div>\n<\/div>\n<\/td>\n
\n
\n
1.0 0.8 0.8<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Piston ring clearance<\/div>\n<\/div>\n<\/td>\n
\n
\n
groove 1 groove 2 groove 3<\/div>\n<\/div>\n<\/td>\n
\n
\n
0.05 to 0.08 0.03 to 0.06 0.01 to 0.04<\/div>\n<\/div>\n<\/td>\n
\n
\n
0.15 0.08 0.08<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Tightening torque<\/strong><\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Connecting rod nuts<\/div>\n<\/div>\n<\/td>\n
\n
\n
torque pressure<\/div>\n<\/div>\n<\/td>\n
\n
\n
40-50 Nm<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
torque angle<\/div>\n<\/div>\n<\/td>\n
\n
\n
90-100\u00b0<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Special tools<\/strong><\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Piston ring pliers<\/div>\n<\/div>\n<\/td>\n
\n
\"m110<\/div>\n<\/td>\n
\n
\n
000 589 51 37 00<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Piston ring compressor<\/div>\n<\/div>\n<\/td>\n
\n
\"m110<\/div>\n<\/td>\n
\n
\n
000 589 04 14 00<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Note<\/strong><\/div>\n<\/div>\n<\/td>\n
\n
\"m110<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
The piston version (std, <\/strong>+ 0.5 or <\/strong>+ 1.0), the group <\/strong>number (0, 1 or 2), the piston code (e.g. 40) and an arrow for forward direction are stamped in the piston crown.<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
The<\/div>\n<\/div>\n<\/td>\n
\n
\n
group number is also stamped in the crankcase<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
mating surface.<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
1034 – 5411<\/strong><\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
03.2-316\/2 F3<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
<\/td>\n<\/td>\n<\/td>\n<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
The group number of pistons (e.g. 1) is the same as the group number of cylinder bores (production).<\/div>\n
This will guarantee the specified piston clearance.<\/div>\n
When repairing, the cylinder bores should be honed according to the sizes of the existing pistons plus the piston clearance.<\/div>\n
Pistons and piston pins are matched.<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
<\/td>\n\n
\n
The measuring point for nominal diameter of pistons is offset by 90\u00b0 in relation to piston pin axis at level H.<\/strong><\/div>\n
On used pistons the measured value does not necessarily correspond with nominal diameter of a new piston, since piston in range of measuring point and at shaft tab may „recede” already after a short operating period, that is, the nominal diameter may become smaller by up to 0.070 mm.<\/div>\n<\/div>\n<\/td>\n
\n
\"m110<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
Piston normal compression dimension H = 32 mm<\/div>\n<\/div>\n<\/td>\n
<\/td>\n<\/tr>\n
<\/td>\n\n
\n
<\/div>\n<\/div>\n

 <\/td>\n

<\/td>\n<\/tr>\n
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If used pistons are used again, make sure that the oil drain bores in 3rd piston ring groove are cleaned.<\/div>\n<\/div>\n<\/td>\n
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Piston low compression and USA version dimension H = 32 mm<\/div>\n<\/div>\n<\/td>\n
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Removal<\/strong><\/div>\n<\/div>\n<\/td>\n
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1 Take out connecting rod with piston from above.<\/div>\n<\/div>\n<\/td>\n
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2 Remove piston pin circlips and press out piston pin.<\/div>\n<\/div>\n<\/td>\n
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3 Repair and square connecting rod (03\u2014313).<\/div>\n<\/div>\n<\/td>\n
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03.2-316\/3 F3<\/div>\n<\/div>\n<\/td>\n
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Installation<\/strong><\/div>\n<\/div>\n<\/td>\n
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103-8914\/1<\/strong><\/div>\n<\/div>\n<\/td>\n
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4 Place piston on connecting rod that arrow (1) faces in forward direction and circlip grooves (2) in connecting rod face to left side of engine (intake manifold).<\/div>\n
Attention!<\/strong><\/div>\n
Don’t heat piston.<\/div>\n<\/div>\n<\/td>\n
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5 Press in piston pin coated with engine oil by hand.<\/strong><\/div>\n<\/div>\n<\/td>\n
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6\u00a0 \u00a0Insert piston pin circlips in grooves.<\/div>\n
When installing used pistons, check piston ring gaps and clearances.<\/div>\n
Check piston rings for easy movement.<\/div>\n
7\u00a0 \u00a0Lubricate cleaned cylinder bores, conrod bearing journals, conrod bearing shells and the pistons.<\/div>\n<\/div>\n<\/td>\n
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8\u00a0 \u00a0Distribute gaps of piston rings around piston circumference evenly.<\/div>\n
9\u00a0 \u00a0Install piston ring compressor and guide in piston with arrow facing forward.<\/div>\n<\/div>\n<\/td>\n
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03.2-316\/4 F2<\/div>\n<\/div>\n<\/td>\n
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10\u00a0 \u00a0Place connecting rod bearing caps with code numbers facing each other on connecting rod and tighten connecting nuts to 40\u201450 Nm initial torque and to 90\u2014100\u00b0 angle of rotation torque.<\/div>\n
11\u00a0 \u00a0 Turn crankshaft and check clearance between piston pin boss and connecting rod.<\/div>\n
12\u00a0 \u00a0Measure distance between piston crown and crankcase mating surface when piston is positioned at TDC (see chart).<\/div>\n<\/div>\n<\/td>\n
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Pistons and connecting rods<\/strong><\/div>\n<\/div>\n<\/td>\n
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1\u00a0 \u00a0Plain compression ring<\/div>\n
2\u00a0 \u00a0Oil scraper ring<\/div>\n
3\u00a0 \u00a0Bevelled compression ring with hose lined spring<\/div>\n
4\u00a0 Piston<\/div>\n
5\u00a0 \u00a0P’ston, USA and low compression<\/div>\n
6\u00a0 \u00a0Circlip<\/div>\n
7\u00a0 \u00a0Connecting rod with conrod cap<\/div>\n
8\u00a0 \u00a0Conrod bolt<\/div>\n
9\u00a0 \u00a0Nut<\/div>\n
10\u00a0 Conrod bushing<\/div>\n
11\u00a0 \u00a0Conrod pin<\/div>\n
12\u00a0 \u00a0Conrod bearing upper half with oil bore<\/div>\n
13\u00a0 Conrod bearing lower half<\/div>\n<\/div>\n<\/td>\n
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03.2-316\/5 F3<\/div>\n<\/div>\n<\/td>\n
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    03\u2014316 Removal and installation of piston   Association piston \u2014 cylinder1 )   Group number   0 1 2 Standard dimension Piston dia Cylinder dia 85.970-85.982 85.998-86.008 85.980-85.992 86.009-86.018 85.990-86.002 86.019-86.028 1st repair stage + 0.5 Piston dia Cylinder dia 86.470-86.482 86.498-86.508 86.480-86.492 86.509-86.518 86.490-86.502 86.519-86.528 2nd repair stage + 1.0 Piston dia Cylinder dia 86.970-86.982 86.998-86.008 86.980-86.992 87.009-87.018 86.990-86.002 87.019-87.028   The smallest measured cylinder dia and the largest measured piston dia are decisive for association.   Piston code number and piston distance   Engine Compression Piston code Distance between piston crown ratio number and cylinder crankcase parting e : 1   surface   Normal compression   110.921 110.922 110.923 110.924 110.981 110.982 110.983 110.984 110.985 110.986 110.987 Std 37, 40, 50, 60, 64, 69 80M.83, 86′),89 Standback 0.20 to 0.70 9.0\u00b10.2 8.7 \u00b10.2 + 0.5 38,\u00a0 41, 51, 67, 70, 84,90 39,\u00a0 42, 52, 68, 71, 85, 91 Standback 1.0 to 1.50 + 1.0   Low compression   110.921 1 10.984 110.922 1 10.985 110.923 1 10.991 110.924     110.931 1 10.992 110.932 1 10.993 8.0-0.4 Std   28, 54, 72, 75 + 0. 5 29, 55, 73, 76 + 1. 0 30, 56, 74, 77 0.25 standout up to 0.15 standback Standback 0.55 to 0.95   1 ) Installed in engine 110.984, 110.985, 110.986 and 110.987 as standard equipment. Not available as repair stages. Use only together with piston of same piston code number.   03.2-316\/1 F3       Test values New\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Wear limit (Installation tolerance)   Piston clearance 0.016 to 0.040 0.08 Difference in weight of pistons in one engine 4g 10 g Piston pin dia. 22.996 to 23.00     Piston pin clearance in conrod bushing 0.007 to 0.017   in piston 0.002 to 0.011   Piston ring gap groove 1 groove 2 groove 3 0.30 to 0.45 0.30 to 0.45 0.25 to 0.40 1.0 0.8 0.8   Piston ring clearance groove 1 groove 2 groove 3 0.05 to 0.08 0.03 to 0.06 0.01 to 0.04 0.15 0.08 0.08   Tightening torque   Connecting rod nuts torque pressure 40-50 Nm   torque angle 90-100\u00b0   Special tools   Piston ring pliers 000 589 51 37 00   Piston ring compressor 000 589 04 14 00   Note The piston version (std, + 0.5 or + 1.0), the group number (0, 1 or 2), the piston code (e.g. 40) and an arrow for forward direction are stamped in the piston crown.   The group number is also stamped in the crankcase mating surface.   1034 – 5411   03.2-316\/2 F3       The group number of pistons (e.g. 1) is the same as the group number of cylinder bores (production). This will guarantee the specified piston clearance. When repairing, the cylinder bores should be honed according to the sizes of the existing pistons plus the piston clearance. Pistons and piston pins are matched.   The measuring point for nominal diameter of pistons is offset by 90\u00b0 in relation to piston pin axis at level H. On used pistons the measured value does not necessarily correspond with nominal diameter of a new piston, since piston in range of measuring point and at shaft tab may „recede” already after a short operating period, that is, the nominal diameter may become smaller by up to 0.070 mm. Piston normal compression dimension H = 32 mm   If used pistons are used again, make sure that the oil drain bores in 3rd piston ring groove are cleaned. Piston low compression and USA version dimension H = 32 mm   Removal   1 Take out connecting rod with piston from above.   2 Remove piston pin circlips and press out piston pin.   3 Repair and square connecting rod (03\u2014313).   03.2-316\/3 F3       Installation 103-8914\/1 4 Place piston on connecting rod that arrow (1) faces in forward direction and circlip grooves (2) in connecting rod face to left side of engine (intake manifold). Attention! Don’t heat piston.   5 Press in piston pin coated with engine oil by hand.     6\u00a0 \u00a0Insert piston pin circlips in grooves. When installing used pistons, check piston ring gaps and clearances. Check piston rings for easy movement. 7\u00a0 \u00a0Lubricate cleaned cylinder bores, conrod bearing journals, conrod bearing shells and the pistons.   8\u00a0 \u00a0Distribute gaps of piston rings around piston circumference evenly. 9\u00a0 \u00a0Install piston ring compressor and guide in piston with arrow facing forward.   03.2-316\/4 F2       10\u00a0 \u00a0Place connecting rod bearing caps with code numbers facing each other on connecting rod and tighten connecting nuts to 40\u201450 Nm initial torque and to 90\u2014100\u00b0 angle of rotation torque. 11\u00a0 \u00a0 Turn crankshaft and check clearance between piston pin boss and connecting rod. 12\u00a0 \u00a0Measure distance between piston crown and crankcase mating surface when piston is positioned at TDC (see chart).   Pistons and connecting rods 1\u00a0 \u00a0Plain compression ring 2\u00a0 \u00a0Oil scraper ring 3\u00a0 \u00a0Bevelled compression ring with hose lined spring 4\u00a0 Piston 5\u00a0 \u00a0P’ston, USA and low compression 6\u00a0 \u00a0Circlip 7\u00a0 \u00a0Connecting rod with conrod cap 8\u00a0 \u00a0Conrod bolt 9\u00a0 \u00a0Nut 10\u00a0 Conrod bushing 11\u00a0 \u00a0Conrod pin 12\u00a0 \u00a0Conrod bearing upper half with oil bore 13\u00a0 Conrod bearing lower half   03.2-316\/5 F3          <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[30,27],"tags":[],"class_list":["post-2343","post","type-post","status-publish","format-standard","hentry","category-crankshaft-assembly","category-m110"],"aioseo_notices":[],"featured_image_src":null,"author_info":{"display_name":"mackuz","author_link":"https:\/\/mbci.mackuz.ovh\/index.php\/author\/mackuz\/"},"_links":{"self":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2343","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/comments?post=2343"}],"version-history":[{"count":1,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2343\/revisions"}],"predecessor-version":[{"id":2344,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2343\/revisions\/2344"}],"wp:attachment":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/media?parent=2343"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/categories?post=2343"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/tags?post=2343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}