What model vehicle? Trooper? Rodeo? Hombre? What size engine?
December, 10, 2011 AT 8:26 PM
Main Bearing Torque Caution For
1992-98 Isuzu 3.2L VIN V & W Engines
The AERA Technical Committee offers the following caution on main bearing torque used for 1992-98 Isuzu 3.2L VIN V & W engines. This information should be referenced anytime main bearing caps are being installed and is used for both SOHC and DOHC engines.
During disassembly, make sure the main caps are marked as to their position front to rear. If they are not, number them before removing them in proper sequence shown in Figure 1 below. The bolts should be removed while the block is room temperature.
When installing the main caps, ensure reference mark on the cap points towards the front of the engine and the cap being installed is at the proper location. Tighten the main cap bolts to specifications and sequence shown below in Figure 2.
Tighten main cap bolts # 17, 18, 19, 20, 21, 22, 23 and 24 to 29 ft/lbs.
Tighten main cap side bolts # 1, 2, 3, 4, 5, 6, 7 and 8 to 29 ft/lbs.
Tighten main cap and Oil Gallery bolts # 9, 10, 11, 12, 13, 14, 15 and 16 to 22 ft/lbs.
Then, tighten bolts # 9, 10, 11, 12, 13, 14, 15 an additional 55-65 degrees of rotation.