Workshop Manual

42.3 CLEANING THE CYLINDER BLOCK

42.3.2 Inspection of Main Bearing Bores

Perform the following steps for main bearing bore inspection:

1. Install the main bearing caps in their original positions. Lubricate the cap bolt threads and

head contact surfaces with a small quantity of clean engine oil

Figure 42-7 Main Bearing Cap Torque Sequence

Bolt Length DD13 DD15 DD16

Main Bearing Cap Bolt 175.5 mm (6.909 in.) 200.5 mm (7.894 in .) 200.5 mm (7.894 i n.)

Table 42-2 Main Bearing Cap Bolt Length

2. Install the main cap bolts and torque bolts to 50 N·m (37 lb·ft).

3. Torque the main cap bolts again to 150 N·m (103 lb·ft).

4. For the DD13, ﬁnal torque the main cap bolts to 300 N·m (221 lb·ft). Then, torque turn

the bolts an additional 90°.

5. For the DD15, ﬁnal torque the main cap bolts to 250 N·m

(184 lb·ft). Then, torque turn the bolts an additional 90°

and again torque turn the bolts an additional 90°.

6. Measure the main bearing bores using dial bore gauge which has a dial indicator calibrated

in 0.0001 in increments. Set the cylinder bore gauge on zero in master setting ﬁxture.

NOTE:

Dial bore ma ster setting ﬁxture should b e used to zero the cylinder bore gauge.

All information subject to change without notice.