10/1/2004
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Bedplate torque sequence for a Chrysler 4.7L
What is the bedplate torque sequence for a Chrysler 4.7L? My manual doesn't seem to list all the fasteners.
The AERA Technical Committee offers the following information regarding the main bearing cap/bedplate bolt torque and sequence for 1999-2004 Chrysler 4.7L VIN N engines.
This engine uses multiple fasteners at many different locations to secure the bedplate to the cylinder block. Some previous publications did not list all of the fasteners. To correctly install the assembly, refer to the illustration and procedure listed in Figure 1.
Lubricate the bedplate retaining bolts with clean engine oil prior to installation.
Locate all fasteners in their correct location, making sure stud bolts are at number 3, 5 & 6 locations (Fig.1 indicated by stars next to number).
Tighten bolts 1-10 to 25 in.lbs. (2.8 Nm).
Turn bolts 1-10 an additional 90°.
Tighten bolts lettered in illustration A-L to 40 ft.lbs. (54 Nm).
Tighten bolts lettered in illustration A1 - A6 to 20 ft.lbs. (27 Nm).
What thrust bearing changes has Mitsubishi made to its 2.0L and 2.4L engine?
The AERA Technical Committee offers the following information on crankshaft thrust bearing changes for Mitsubishi 2.0L DOHC 4G63 Turbo and 2.4L SOHC 4G64 engines.
Due to the changes in the crankshaft center bearing, the crankshaft bearing selection procedure for the affected engines has been changed. This new procedure will supersede all previous manuals.
Install the main bearings as follows (Figure 2):
Install the bearings with an oil groove into the cylinder block.
The positions 1, 2, 4 and 5 upper block side bearing shells are grooved.
The number 3 position thrust now uses grooveless upper and lower bearing shells.
Install the bearings with NO oil groove into the bearing caps.
The positions 1, 2, 4 and 5 lower side bearing shells are grooveless.