Tag
#lifters
3 posts in Car Diagnostics blog about "lifters" — OBD-II diagnostics, DTC codes, repair. ← All posts
-
P3400: cylinder deactivation system and the lifters that fail
Shutting off half the cylinders saves fuel and adds a mechanism that fails in a specific, expensive way. Oil condition is what decides which you get.
-
Ticking at idle: injectors, lifters or an exhaust leak
Some ticking is entirely normal and some means an engine is running out of oil pressure. The difference is in how the noise responds to temperature and revs.
-
Engine knocking: how the sound itself tells you whether to drive on or shut down
Not all knocks are equal. One disappears after warm-up and threatens nothing; another means a rebuild is a few hundred miles away. Diagnosis by sound character, RPM, and temperature.