Measure the relief valve seat depth in the lubricating oil
pump. The maximum depth is 46.73 mm [1.840 inch].
Testing
Remove the lubricating oil pump. Refer to Procedure
2-13.
Remove the lubricating oil pump cover.
Remove all gasket material from the lubricating oil pump
body and cover.
Measure the installed depth of the high pressure relief
valve retainer plug.
If the plug depth is less then 6.48 mm [0.255-inch], use
DFC pressure relief valve fixture, Part No. 3376011, to
install it to the correct depth of 6.48 mm to 6.98 mm
[0.255-inch to 0.275-inch].
High Lubricating Oil Pressure Relief Valve (2-14) Section 2 - Lubricating System
N14Page 2-36