Bad injector testing

[tree98]

(07-09-2017 )kmk Wrote:  The die test is the only way to go. Sometimes its the top orings or small cracks in the head around the injectors. Its really hard to find the red die, auto stores sell yellow, which makes it more difficult to pinpoint the problem. Make a small plate and mount it above the drive gear for the pump to avoid oil spray. If you are losing prime its more likely o-rings.

Has lost prime a couple times lately. Can I replace the orings or do I have to replace the injectors?