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 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/