F510 & F525 Cylinder Head and Valves – REPLACE VALVE GUIDE BUSHINGS

1. Drive valve guide bushing (A) into valve chamber (B) using JDG-504 Valve Guide Driver.

2. Clean carbon deposits from valve guide port.
3. Install new bushing with valve guide driver.
4. For PA420A/PA540A-AS00, install bushing from valve chamber side until snap ring (A) just seats on head.
For PA420A/PA540A-BS00, AS01 and AS02, install
bushing from valve chamber side until top of bushing (B)
is specified distance above machined surface of cylinder
head.
VALVE GUIDE BUSHING HEIGHT SPECIFICATIONS
PA420A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 mm (0.472 in.)
PA540A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.5 mm (0.372 in.)

5. Finish reaming valve guide bushings with stanisol or kerosene lubricant and D-20020WI—7 mm Valve Guide Reamer from JT07096 Valve Guide Service Kit. Turn reamer clockwise.
6. Thoroughly clean valve area before assembly.
BUSHING FINISHED I.D. SPECIFICATION
Valve Guide . . . . . . . . . . . . . . . . . . 7—7.02 mm (0.275—0.276 in.)

04. June 2021 by samuel07042012
Categories: F510-F525 | Leave a comment

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