[DML] Re: car pings when accelerating

["stainlessilusion" <5n-@xxxxxxx>]

It's hard to tell the differences unless you are a mechanic, for me a 
pinging is a different pitch sound and is more internal sounding [I'm 
sure the helps a loooot]. I'm not really sure how to describe how it 
would sound. If hear a hammering that's usually a rod cap that's loose 
on the rod. The rockers won't be just a repeating ping or knocking 
sound, they actually just 'chatter'. Like if you took all the rocker 
arms and violently jiggled them up and down-with the play they have 
they will all make noise but not in a repetition since some are 
compressing the springs and etc so it will just be..well..noise. But 
they will make noise only at certain times. Only when you're at lower 
range RPMS with a good load on the engine will they chatter. For 
instance, if you're going up a hill and you up shift to a gear that 
can't quite pull the load of the car yet and you step on the gas hard 
so it will-then you'll hear it. Or say if you're coasting on a road at 
20 and you put it in 5th gear (assuming you have a 5spd)-car will be 
at like 1000RPMS you'll hear them then too. But if you're going down 
the highway at 60 and push on the gas in 5th you probably wont. So if 
you have no load (driving a straight road) and you're at about 
3500RPMS and you push on the gas, do you hear it then? Take the car 
and try going down the road at 20 or 30 and then hit the gas, the 
rockers will be noisy until the RPMS are up, and then fade even with 
heavy acceleration. After I read this again to myself; because the 
rockers only make the chatter at a low RPM range, you usually don't 
always hit the range driving [5spd anyway] so most times you won't 
hear the noise ALL the time but sometimes. Then again it depends on 
your driving and shifting habits. Since I'm not sure what RPMS the 
auto hits when it shifts, I will leave it out of this post. -----Dani 
B. #5003

--- In dmcnews@xxxxxxxxxxxxxxx, "sweetp01569" <paul.sweet@xxxx> wrote:
> Not sure.  The engine is quiet when gently accelerating, but if I 
push 
> the pedal to the floor, I hear what sound like pinging, like the 
> engine can't quite keep up with me gunning it.  Then if I ease up on 
> the pedal, the sound vanishes.
> 
> What's the difference between pinging sounds and rocker chatter?
> 
> Paul
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, "stainlessilusion" <5n-@xxxx> wrote:
> > Are you sure the engine is pinging in the cylinders? Maybe you're 
> > mistaking the sound with the normal rocker chatter...-----Dani B. 
> #5003







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