WebMar 8, 2024 · Piston slap is an important phenomenon of reciprocating combustion engines and may cause liner cavitation and engine noise. It happens when the side force acting on the piston changes. It is crucial to accurately predict slap forces and the corresponding response of engine parts. WebNov 15, 2010 · Some say that piston slap is not detrimental to the engine and does not affect longevity or performance. I can remember my dad's Chevelle SS had excessive oil consumption and piston slap. ... so I suspect it isn't a reliability problem, just a "my engine makes this bad noise" problem. 1998 suburban-1/2 ton 199500 miles River Ridge,LA. …
What Is Piston Slap? What Causes It & What To Do About It
WebMany car owners face the problem of piston slap. Most car owners might not know what pistons are or what they do, but they are important for running your ... However, the car will still run fine; it just has a consistent knocking noise when running cold. However, a piston slap can become a bigger problem over time. It steadily wears down your ... WebMar 27, 2024 · The location of the wrist pin in the piston is also important. Most stock engines have the pin slightly offset to reduce piston slap and noise. But in a race engine, a center-mounted pin will be more stable at high RPM. 9. Modifying piston valve reliefs is often necessary with oversized valves and high lift cams. is kratom allowed in the military
Knocking noise mystery Subaru Outback Forums
WebDec 3, 2009 · I'd say thinner oil like 0W30 and 5W30 would be better when cold. If the noise goes away quickly after warm up then I don't think it would be worth worrying about. If the pistons slap even while hot then you probably have a lot of clearance that never gets taken up and will have higher wear. O. WebNov 19, 2024 · Super Moderator. Outback 2011 3.6R Premium (sold Jan 22) Joined Aug 9, 2024. 4,709 Posts. #3 · Nov 15, 2024. The noise could simply be the tip of the auto tensioner tapping/knocking on the mating pin on the engine. Auto tensioners wear a groove in the pin that the tip of the auto tensioner mates to. WebApr 2, 2024 · Carla wrote the noise goes away “after a couple minutes” which indicates piston slap (meaning she wrote to the right column!) but if she’d written “a couple moments” I’d be guessing oil pressure. If there’s an oil light or gauge and the noise goes away when the light goes out or gauge perks up that’s conclusive. key d chords