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Repair Procedure: Overview

This bulletin involves installing revised valve springs and decarbonizing the combustion chamber.

1. Use the procedure outlined in the appropriate 1998 Service Manual, Group 9, 4.0L Engine, Removal And Installation, Valve Stem Seal And Spring, to remove and install the revised valve springs (p/n 53010388).

2. Perform the following Decarbonizing Procedure.
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