5-101.bk Page 23 Friday, March 17, 2006 11:05 AM
200 ENGINE ASSEMBLY RIGHT SIDE OF ENGINE 2 1
110 mm
FRONT OF VEHICLE
80 mm
80 mm 1
1
80 mm
BOTTOM VIEW 200340a
Figure 6-23 — Buttress Capscrew Locations 1. 80-mm buttress capscrews
After obtaining proper main bearing clearance: 1. Check torque of main bearing capscrews: 210 lb-ft (285 N폷m) using torque wrench J 24407 or equivalent. 2. Torque the buttress capscrews to 90 lb-ft (122 N폷m) using torque wrench J 24407 or equivalent.
[212 NP & 212 LP] PISTONS AND CONNECTING RODS Description
2. 110-mm buttress capscrews
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
Since 1991, all E7 engines have used a twopiece 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.
Page 6-23
