5-101.bk Page 5 Friday, March 17, 2006 11:05 AM CUTTING THE COUNTERBORE [212 CV] AUXILIARY DRIVESHAFT Refer back to Figure 5-1. 1. Fill the oil fill tube (7) with 30W nondetergent oil to maintain lubrication during use. Description All current production engines (effective February 27, 1992, serial No. 2E1233) are equipped with a “fast ratio” auxiliary driveshaft assembly and oil pump assembly. This arrangement raises oil pump speed to increase operating oil pressure 25%. Refer to Auxiliary Driveshaft Installation instructions in the ENGINE ASSEMBLY section for ratio information. 2. Back off the lower depth-set collar (16) two increments or less, and tighten the thumbscrew (6) securely. 3.
Cut the counterbore by turning the T-handle clockwise while maintaining constant downward pressure on the tool. Stop the handle in a different position to avoid creating a ridge in the counterbore. 4. Continue backing off the lower depth-set collar, no more than two graduations per cut. Check the depth measurement between each adjustment. Plan to remove 0.001 inch (0.025 mm) on the final cut to meet the final predetermined counterbore depth. This ensures achieving a very fine machined finish. Do not mix “fast ratio” and “standard ratio” components. Serious damage may occur. Inspection 5. Remove the tool from the cylinder bore. 1. Thoroughly clean auxiliary driveshaft. 2.
Inspect auxiliary driveshaft journals and gear teeth for evidence of cracks, pitting, scoring or severe wear. If any of these conditions exist, replace the auxiliary driveshaft. a. Loosen the two cutter bit hold-down capscrews (9) and rotate the cutter bit adjusting screw (10) counterclockwise until the cutter bit is retracted into the cutter plate (13). [212 LP] CONNECTING RODS b. Remove the four machine hold-down bolts (3) and special washers (4). Description c. Remove the tool from the cylinder bore. 6. Follow steps 1 through 5 for the remaining cylinders. Refer to Figure 5-2. Early E7 engine connecting rods were machined to give rod cap bottoms a contoured appearance.
Since mid-1992, connecting rod caps have had a flat, machined bottom. The rods are the same in strength and configuration, with the only difference being the rod cap bottom surface machining. Page 5-5 200 BENCH PROCEDURES