Originally Posted By: OVERK1LL
Originally Posted By: Trav
Used in a generic way "lifter" is totally acceptable terminology.
These are actually "lifters" in the 4.0 as they "lift" the rear of the cam follower to remove play.
http://en.wikipedia.org/wiki/Hydraulic_tappet
Timing chains are a known issue.Any plastic particles when doing a oil change?
Lol, wikipedia for engine advice
A lifter, in the traditional sense, is a flat or roller cylinder which follows the profile of the camshaft to operate on a pushrod, actuating a rocker and opening the valve.
This is a LASH adjuster, because that is what it does. It removes excessive lash from the rocker. They are no different than the hydraulic lash adjusters used in the Modular family, and operate in the same way.
The term "lifter" is a misnomer here, since the valve would still open if the device were not present, since this device does not actually actuate the valve.
The wikipedia article you cited is already flagged for having issues, and I imagine this is why.
I'm sure for many that it is nice to "dumb it down" and classify them all as one in the same, since the two you are thinking of are both hydraulic cylinders, but one acts directly on the rocker CAUSING lift as well as controlling lash, whilst the other simply controls lash.
non-hydraulic lifters such as solid lifters and solid roller lifters of course provide no lash compensation function, yet are still lifters.
This is why the separate term "hydraulic lash adjuster" exists, and of course omits the word "lifter" from the phrase.....
By the way, I am NOT intending this to sound harsh, so please don't take it that way. The distinction was always noted by my mechanics teacher, and in our textbooks and I think it is an important one to note. As the uses are specific between pushrod and overhead cam engines.
OK, can lash adjusters make a noise similar to lifter noise?