Lower Crankcase Installation (LV7)

Fig 1: Identifying Lower Crankcase Components And Bolts With Tightening Sequences (LV7)

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
1	Lower Crankcase Procedure Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant NOTE: The block assembly surface must be free of contamination prior to applying the sealer. Install and align the bedplate to block within 20 minutes of applying the sealer. The bedplate must be fastened to final torque specification within 60 minutes of applying the sealer. Apply a 3 mm bead of sealer directly in the groove of the block to bedplate mating surfaces. Refer to Adhesives, Fluids, Lubricants, and Sealers (Europe LV7)Adhesives, Fluids, Lubricants, and Sealers (North America LV7) . Install the lower crankcase, ensure the lower crankcase is aligned properly on the dowels. Tap gently into place with a suitable tool, if necessary.
2	Lower Crankcase Bolt [10x] CAUTION: Refer to Fastener Caution . CAUTION: Refer to Torque-to-Yield Fastener Caution . Procedure Tighten the NEW lower crankcase bolts in the sequence shown. Tighten the bolts in sequence a first pass to 15 N.m (11 lb ft). Using the EN 45059 angle meter, tighten the bolts in sequence a final pass to 180 degrees. Special Tools EN-45059 Angle Meter For equivalent regional tools, refer to Special Tools .
3	Lower Crankcase Bolt [13x] Procedure Apply sealant to the lower crankcase perimeter bolts. Refer to Adhesives, Fluids, Lubricants, and Sealers (Europe LV7)Adhesives, Fluids, Lubricants, and Sealers (North America LV7) . Tighten the lower crankcase bolts in the sequence shown. Tighten the bolts in sequence a first pass to 5 N.m (44 lb in). Tighten the bolts in sequence a final pass to 10 N.m (89 lb in).

Callout

Component Name

Lower Crankcase

Procedure

Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant

NOTE:

The block assembly surface must be free of contamination prior to applying the sealer.
Install and align the bedplate to block within 20 minutes of applying the sealer.
The bedplate must be fastened to final torque specification within 60 minutes of applying the sealer.

Apply a 3 mm bead of sealer directly in the groove of the block to bedplate mating surfaces. Refer to Adhesives, Fluids, Lubricants, and Sealers (Europe LV7)Adhesives, Fluids, Lubricants, and Sealers (North America LV7) .
Install the lower crankcase, ensure the lower crankcase is aligned properly on the dowels. Tap gently into place with a suitable tool, if necessary.

Lower Crankcase Bolt [10x]

CAUTION:

Refer to Fastener Caution .

CAUTION:

Refer to Torque-to-Yield Fastener Caution .

Procedure
Tighten the NEW lower crankcase bolts in the sequence shown.

Tighten the bolts in sequence a first pass to 15 N.m (11 lb ft).
Using the EN 45059 angle meter, tighten the bolts in sequence a final pass to 180 degrees.

Special Tools
EN-45059 Angle Meter
For equivalent regional tools, refer to Special Tools .

Lower Crankcase Bolt [13x]
Procedure

Apply sealant to the lower crankcase perimeter bolts. Refer to Adhesives, Fluids, Lubricants, and Sealers (Europe LV7)Adhesives, Fluids, Lubricants, and Sealers (North America LV7) .
Tighten the lower crankcase bolts in the sequence shown.
Tighten the bolts in sequence a first pass to 5 N.m (44 lb in).
Tighten the bolts in sequence a final pass to 10 N.m (89 lb in).