imp: i worked a a dealership for 2 years and the dodge neon had a problem of noise at start up for just a second or two i worked on several of them putting new main bearings,oil filters even a crank kit in some, nothing seemed to work come to find out it was improper piston wall clerances causing cold piston slap for a breif second at start up.
there different kinds of oil additives that stop that problem, its called dry start. like mentioned its when there isn't oil on top of the motor on start up and it isn't good. destroys the engine. most of engine wear comes from this problem.
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