1.4 VALVES, SPRINGS, GUIDES, INSERTS, SEALS AND ROTATORS 1.4.3.1 Cleaning of Valves and Related Parts Clean the valves and parts as follows: EYE INJURY To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 276 kPa (40 psi) air pressure. 1. Using proper eye protection, clean all of the disassembled parts with fuel oil and dry with compressed air. 2. Clean the carbon from the valve stems and wash the valves with fuel oil. 3. Clean the valve guide bore to remove all gum and carbon deposits. [a] For diesel engines; use bore brush (J–5437) (or equivalent) for this procedure.
[b] For natural gas engines; a cloth or soft nylon brush is recommended for this procedure. NOTE: Do not use bore brush (wire) on natural gas powdered metal guides. (Rev. 2005) All information subject to change without notice. 1-88 6SE483 0507 Copyright © 2005 DETROIT DIESEL CORPORATION