IN-VEHICLE SERVICE
Crankshaft Main Bearings
The main bearing inserts are a precision selective fit. To check the bearing clearances or to select fit a new
bearing, refer to Section 03-00 .
Removal
1. Disconnect ground cable at battery and set aside.
2. Remove engine accessory drive belt (8620).
3. Remove oil pan (6675) as outlined in this section.
4. Remove oil pump (6600).
5. Replace one bearing at a time, leaving the other bearings securely fastened. Remove main bearing
cap to which new bearings are to be installed.
6. NOTE: Rotate remover against end of crankshaft main bearing (6333) opposite locating tang.
Insert Main Bearing Insert Tool TOOL-6331-E or equivalent in the oil hole in the crankshaft (6303).
7. Rotate crankshaft in the direction of the engine rotation to force the bearing out of the cylinder blocks
(6010).
8. Clean crankshaft journals. Inspect journals and thrust faces (thrust bearings) for nicks, burrs, or
bearing pickup that would cause premature bearing wear.
9. Refer to Crankshaft Rear Oil Seal
in this section if the crankshaft rear oil seal (6701) is to be
replaced.
Installation
NOTE: Lightly oil all bolt and stud threads before installation.
1. Lubricate and position the upper crankshaft main bearing on the crankshaft journal with the plain end
started into the side of the cylinder block with the locking tang slot. Line up the bearing tang with the
slot in the block.
2. Install Main Bearing Insert Tool TOOL-6331-E or equivalent in the crankshaft journal oil hole.
3. With the bearing and tool in position, rotate the crankshaft so that the tool catches the edge of the
bearing, pushes into position, and seats in the cylinder block. Remove tool.
4. Install bearing insert in the main cap.
5. If bearing insert clearance is to be checked, refer to Section 03
-00 .
6. If No. 1 or No. 2 crankshaft main bearing was removed, lubricate the bearing surface with Engine
Assembly Lubricant D9AZ-19579-D or equivalent meeting Ford specification ESR-M99C80-A. Install
Section 03-01B: Engine, 3.0L V-6 1997 Aerostar, Ranger Workshop Manual
file://C:\TSO\tsocache\VDTOM_5368\SVK~us~en~file=SVK31B29.HTM~gen~ref.HTM
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