A veteran tech in Phoenix told me my injector cleaning method was too harsh, and after seeing the scoring on a 6.7 Powerstroke's tips, I think he's right.

I've been using that aggressive ultrasonic cleaner with the strong solvent for years on all my injector pulls. Figured getting them spotless was the goal. This guy, who's been at a Freightliner dealer for thirty years, pulled me aside after a shop day and said, 'You're washing the dinner plate with a pressure washer. You're taking off the good stuff too.' He showed me a set from a truck I'd done six months prior. Under his magnifier, you could see faint scoring on the nozzle seats I hadn't even noticed. He convinced me to switch to a milder, heated diesel-specific bath and just let them soak longer. The difference in the surface finish is real. Has anyone else dialed back their cleaning process and seen better long-term results?

3 comments

3 Comments

johnson.blake1mo ago

That scoring could just be normal wear from the engine itself. Plenty of shops run the strong cleaners for years without any real problems. A perfectly clean injector might still outlast a gently cleaned one that's still got some gunk in the wrong spot.

robert_walker1mo ago

Wait, he kept your old injectors for six months to show you?

olivia_carr71mo ago

My buddy learned that "spotless" goal the hard way when his cleaned injectors started leaking early.

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