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200 ENGINE ASSEMBLY
Page 6-23
Figure 6-23 — Buttress Capscrew Locations
After obtaining proper main bearing clearance:
1. Check torque of main bearing capscrews:
210 lb-ft (285 N
폷
m) using torque wrench
J 24407 or equivalent.
2. Torque the buttress capscrews to 90 lb-ft
(122 N
폷
m) using torque wrench J 24407 or
equivalent.
[212 NP & 212 LP] PISTONS
AND CONNECTING RODS
Description
Since 1991, all E7 engines have used a two-
piece piston. To ensure a continued high level
of piston durability, the piston crown is made of
forged steel and the piston skirt is made of cast
aluminum. The piston pin bore pedestal and skirt
are stamped FRONT and must face the front of
the engine. These production parts are not
interchangeable with 1989/1990 production.
The piston design incorporates two compression
ring grooves and one oil control ring groove. A
plasma-faced keystone type ring is used in the
top location. A tapered chrome rectangular-type
ring is used in the second ring groove. The oil
control ring is located in the third or lower ring
groove, nearest the piston pin bore. The new
piston rings are designed to further improve oil
and particulate control.
Special Tools Required
앫
Piston Ring Compressor J 23442 or Piston
Ring Compressor PT7070-A
200340a
RIGHT SIDE OF ENGINE
80 mm
80 mm
80 mm
110 mm
1
2
1
1
BOTTOM VIEW
FR
ONT
OF
VEHICLE
1. 80-mm buttress capscrews
2. 110-mm buttress capscrews
5-101.bk Page 23 Friday, March 17, 2006 11:05 AM
Summary of Contents for E7
Page 1: ...E7 ENGINE OVERHAUL AUGUST 1997 ENGINE 5 101...
Page 2: ...Page 0 front fr5 Page 0 Friday March 17 2006 11 04 AM...
Page 5: ...E7ENGINE OVERHAUL MARCH 2006 2 5M REP AUGUST 1997 10M MACK TRUCKS INC 1997 ENGINE 5 101...
Page 13: ...ABOUT THIS MANUAL Page ix ABOUT THIS MANUAL front fr5 Page ix Friday March 17 2006 11 04 AM...
Page 15: ...TABLE OF CONTENTS Page xi TABLE OF CONTENTS front fr5 Page xi Friday March 17 2006 11 04 AM...
Page 24: ...Page xx NOTES front fr5 Page xx Friday March 17 2006 11 04 AM...
Page 31: ...200 SPECIFICATIONS Page 2 1 SPECIFICATIONS 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 55: ...200 ENGINE REMOVAL Page 3 1 ENGINE REMOVAL 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 58: ...Page 3 4 NOTES 5 101 bk Page 4 Friday March 17 2006 11 05 AM...
Page 90: ...Page 4 32 NOTES 5 101 bk Page 32 Friday March 17 2006 11 05 AM...
Page 91: ...200 BENCH PROCEDURES Page 5 1 BENCH PROCEDURES 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 158: ...Page 5 68 NOTES 5 101 bk Page 68 Friday March 17 2006 11 05 AM...
Page 159: ...200 ENGINE ASSEMBLY Page 6 1 ENGINE ASSEMBLY 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 240: ...Page 6 82 NOTES 5 101 bk Page 82 Friday March 17 2006 11 05 AM...
Page 272: ...Page 8 10 NOTES 5 101 bk Page 10 Friday March 17 2006 11 05 AM...
Page 273: ...200 TROUBLESHOOTING Page 9 1 TROUBLESHOOTING 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 292: ...Page 9 20 NOTES 5 101 bk Page 20 Friday March 17 2006 11 05 AM...
Page 293: ...200 APPENDIX Page 10 1 APPENDIX 5 101 bk Page 1 Friday March 17 2006 11 05 AM...
Page 295: ...200 APPENDIX Page 10 3 E7 LUBRICATION SYSTEM 5 101 bk Page 3 Friday March 17 2006 11 05 AM...
Page 296: ...Page 10 4 200 APPENDIX E7 COOLING SYSTEM 5 101 bk Page 4 Friday March 17 2006 11 05 AM...
Page 297: ...INDEX Page 11 1 INDEX INDEX FR5 Page 1 Friday March 17 2006 11 04 AM...
Page 302: ...Page 11 6 NOTES INDEX FR5 Page 6 Friday March 17 2006 11 04 AM...
Page 303: ...E7 ENGINE OVERHAUL PRINTED IN U S A ENGINE 5 101 MACK TRUCKS INC 1997...