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Installation ProcedureIn-vehicle Repair of Leaking Full Circle Rear Main Seal with a Micro Sleeve

1.) Removal of leaking main seal on a 5.7L Chevrolet Suburban.

In-vehicle Repair of Leaking Full Circle Rear Main Seal with a Micro Sleeve

2.) Wipe crankshaft flange clean and position Micro Sleeve crankshaft seal surface sleeve.

In-vehicle Repair of Leaking Full Circle Rear Main Seal with a Micro Sleeve

3.) Position MST301 Installation Tool into pilot bearing recess. (There are changable screw-on "buttons" for different pilot bearing recess sizes.)
Note - Some aluminum seal housings have three small "fingers" protruding toward the crankshaft flange. These need to be clipped using side cutters to prevent interference with the installed sleeve. Make sure this clipped debris is cleaned from the seal housing.

In-vehicle Repair of Leaking Full Circle Rear Main Seal with a Micro Sleeve

4.) "Square" (align) the Micro Sleeve crankshaft seal surface sleeve with the crankshaft flange and "hammer" on using MST301 tool. (There are "recess holes" in the backing plate to accommodate the flex plate alignment pins.)

In-vehicle Repair of Leaking Full Circle Rear Main Seal with a Micro Sleeve

5.) After pressing Micro Sleeve crankshaft seal surface sleeve onto flange, remove MST301 tool - repair sleeve must be flush with crankshaft flange face.

In-vehicle Repair of Leaking Full Circle Rear Main Seal with a Micro Sleeve

6.) Check to see if crankshaft seal surface sleeve is "flush" with back of crankshaft flange.

In-vehicle Repair of Leaking Full Circle Rear Main Seal with a Micro Sleeve

7.) Apply light grease to 360 degrees of the crankshaft seal surface sleeve seal surface area.

In-vehicle Repair of Leaking Full Circle Rear Main Seal with a Micro Sleeve

8.) Install Micro Sleeve full round seal using standard seal installation procedures - align seal "square" with rotating mass (crankshaft flange). Option : "stake" seal to insure there is no seal rotation in seal cavity.

In-vehicle Repair of Leaking Full Circle Rear Main Seal with a Micro Sleeve

9.) New seal surface - new seal - no leaks courtesy of Micro Sleeve
"In-Vehicle" full circle rear main seal repair.
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