fits  99-17 (NU) Twin Cam; 17-25 M8

This tool allows you to test the piston cooling jets. Leaking piston cooling jets can send too much oil into the crankcase, causing high engine oil sump levels. Clogged cooling jets can reduce cooling. Helps diagnose and prevent issues before finishing the engine build. This is a complete kit including the tool plate, pressure gauge, regulator and hardware. Note: If you already have Feuling’s 566117 Twin Cam pressure relief valve test tool, you just require 707289 tester block only to be able to test the piston cooling jets.

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