What causes a ticking noise in a GM V8 lifter?
If an AFM lifter is mechanically collapsed/stuck, a consistent valvetrain tick noise, SES light and DTC P0300 will be experienced with engine misfires on cylinder 1, 4, 6 or 7. If this concern is experienced, perform SI diagnosis.
How to clean ticking GM V8 lifters and DTC?
Remove the oil filter, disable the anti-drainback valve with a screwdriver or awl and drain the oil from the filter into a CLEAN GLASS bottle. A clean and dry Snapple iced tea bottle works very well for this. Please do not clean the bottle with any solvents, as we will be looking for PPM in the oil sample.
How to change the lifter on a car?
The main steps to change the engine lifter include: 1 Take off the engine top 2 Remove the valve cover 3 Take out the engine intake manifold 4 Take out the lifter the faulty lifter 5 Install the new lifter 6 Finally, put the parts back the opposite way you took it out. More …
Why does my Chevy 5.3L engine keep ticking?
When reassembling the engine, ensure that the lifters are properly aligned to the new plastic lifter guides before they are installed. If they are not properly aligned, it may damage the plastic lifter guide once it is torqued, which may allow the lifter to turn in the guide. Low oil pressure to the VLOM can also cause AFM lifter damage.
If an AFM lifter is mechanically collapsed/stuck, a consistent valvetrain tick noise, SES light and DTC P0300 will be experienced with engine misfires on cylinder 1, 4, 6 or 7. If this concern is experienced, perform SI diagnosis.
Remove the oil filter, disable the anti-drainback valve with a screwdriver or awl and drain the oil from the filter into a CLEAN GLASS bottle. A clean and dry Snapple iced tea bottle works very well for this. Please do not clean the bottle with any solvents, as we will be looking for PPM in the oil sample.
When reassembling the engine, ensure that the lifters are properly aligned to the new plastic lifter guides before they are installed. If they are not properly aligned, it may damage the plastic lifter guide once it is torqued, which may allow the lifter to turn in the guide. Low oil pressure to the VLOM can also cause AFM lifter damage.
What causes a GM V8 lifter to collapse?
* Cylinder deactivation (Active Fuel Management) system compression test in SI. If the running compression of the misfiring cylinder stays below 25 psi regardless of the AFM solenoid being commanded on or off, the AFM lifter is mechanically collapsed/stuck or unlocking as soon as the engine is started.