General Information
Lip Seal
Engines covered by this procedure use a lip style rear crankshaft seal (shown) in which the rotating portion of the
sealing occurs at the contact surface between the lip of the seal and the crankshaft.
Front gear train engines use a rear crankshaft seal that is mounted in a rear seal carrier that bolts to the rear of the
cylinder block (shown). Rear gear train engines use a rear crankshaft seal that is installed into the flywheel housing
bore (not shown).
Preparatory Steps
NOTE: Use a container that can hold at least 26 liters [27qt] of lubricating oil.
• Disconnect the batteries. Refer to the OEM service manual.
• If equipped with a wet flywheel housing, drain the oil from the flywheel housing by removing the plug in the bottom of the flywheel housing.
• Remove the transmission and all related components (if equipped). Refer to the OEM service manual.
• Remove the flywheel, if installed. Refer to Procedure 016-005 in Section 16.
• Remove the flexplate, if installed.Refer to Procedure 016-004 in Section 16.
Remove
Rear Gear Train
Lip Seal
NOTE: Lip style rear crankshaft seals can be removed using screws and a slide hammer. This procedure will
not be followed on engines with a unitized seal.
Drill two holes, 180-degrees apart, into the rigid portion of the seal.
Install two coarse thread sheet metal screws into the holes just drilled. Use a slide hammer to remove the rear
crankshaft seal.
Clean and Inspect for Reuse
Clean the rear crankshaft sealing surface and bore with solvent.
Dry the surface with compressed air.
NOTE: If the crankshaft has excessive wear, a service wear sleeve is available.
Inspect the crankshaft seal contact area for a wear groove on engines equipped with a lip style rear crankshaft seal.
If the groove is deeper than 0.25 mm [0.01 0 in], a wear sleeve and oversize seal must be used. Refer to
Procedure 001-067 in Section 1.
Install
To aid in installation, apply a mild soap to the outside diameter of the seal case (A).
NOTE: On engines equipped with a lip style rear crankshaft seal, a seal pilot (B) is provided with the new
seal. The seal must be left on the seal pilot while installing the seal onto the nose of the crankshaft. This will make
sure the lips of the seal do not get damaged during installation.
Place the new rear crankshaft seal, with the seal pilot, over the crankshaft nose and slide it by hand toward the
flywheel housing.
NOTE: Make sure the seal is positioned square with the crankshaft.
Remove the seal pilot.
All Applications
Each new lip style crankshaft seal comes with a disposable seal driver.
1. The seal driver for front gear train engines, which is typically a metal ring, will install the crankshaft seal to
the proper depth in the rear seal carrier bore.
2. The seal driver for rear gear train engines, which is typically a plastic ring, will install the crankshaft seal to
the proper depth in the flywheel housing bore.
NOTE: For rear gear train engines, rear crankshaft seals for the wet flywheel housing applications do not come with
a disposable seal driver. Service tool, Part Number 3824078, must be used to install the rear crankshaft seal for the wet flywheel housing. This is the same service tool used for installing the rear crankshaft seal and wear sleeve assembly. Refer to Procedure 001-067 in Section 1.
NOTE: For front gear train engines, this service tool can be used in place of the disposable seal driver that comes
with the crankshaft seal.
For rear gear train engines, the disposable plastic driver that comes with the new rear crankshaft seal is designed
to be used with two types of seals.
• A double outer dust lip rear crankshaft seal – for this type of seal, the side of the disposable driver (1) with
the large chamfer on the inner diameter must be used to contact the seal.
• A single outer dust lip rear crankshaft seal- for this type of seal, the side of the disposable driver (2) with the small chamfer on the inner diameter must be used to contact the rear crankshaft seal.
NOTE: It may be necessary to lightly tap the rear crankshaft seal with a plastic hammer, without the disposable seal driver, to help start the seal in the flywheel housing bore. Once the seal is started, the disposable seal driver will pilot onto the crankshaft mounting flange.
Use the appropriate disposable seal driver that comes with each new rear crankshaft seal to install the seal to the
correct depth in the housing.
Use a plastic hammer to drive the seal into the housing until the alignment tool stops against the housing.
Hit the tool at 12, 3, 6, and 9-o’clock positions to drive the seal evenly and to prevent bending the seal carrier.
Optional Method
For rear gear train engines, the disposable plastic driver that comes with the new rear crankshaft seal has been
designed with two holes in the outer ring. These holes are provided so that the driver can be used in conjunction with
the Rear Crankshaft Seal Replacer Kit, Part Number 3164660.
With the correct side of the disposable driver facing outward for the type of seal that will be installed, center
the disposable driver on the crankshaft seal replacer.
Attach the disposable driver to the crankshaft seal replacer. Use two sheet metal screws (number 10 by 19 mm [. 75 in] long).
With the rear crankshaft seal installed onto the crankshaft flange as described earlier in this procedure, mount the.
replacer screw assembly (1) onto the rear of the crankshaft.
Install the two M12 x 1.25 x 60-mm socket head capscrews (3).
Lubricate the replacer screw with anti-seize compound or a suitable grease.
Hold the replacer screw and install the crankshaft seal replacer (2) onto the replacer screw assembly. Advance
the crankshaft seal replacer toward the seal by rotating it clockwise until the attached disposable driver is positioned against the rear crankshaft seal.
While holding the crankshaft seal replacer, rotate the replacer screw counterclockwise until the disposable
driver attached to the crankshaft seal replacer makes contact with the flywheel housing.
Remove the service tools.
