the pointy end is the bow
Join Date: Aug 2006
Location: La Conner, Washington
Thanked 27 Times in 26 Posts
Rep Power: 10
That's CYA talk from the manufacturer to pop them out and send them to an injector shop to check spray pattern and to see if they're leaking (either will cause some inefficient running or starting problems). From my perspective with some time as a diesel mechanic, I practice the "if it ain't broke, don't fix it" approach. If you keep up on your fuel filters and oil changes your engine is barely broken in.