[CU2] Collecting data for "pinging" issue

[chikaboom]

Pinging: YES (Pinging occurs frequently after 3000rpm)
Build Date: 08/2008
Milage: ~ 7,800km
Auto/Manual: Manual
Petrol: BP 98RON ALWAYS
Style: Mostly city/suburb driving and occasional highway and mountain (580m sealevel)

[Joystick]

Pinging: YES (Pinging occurs frequently after 3000rpm)
Build Date: 08/2008
Milage: ~ 7,800km
Auto/Manual: Manual
Petrol: BP 98RON ALWAYS
Style: Mostly city/suburb driving and occasional highway and mountain (580m sealevel)

Woah, first I've ever heard of a manual having the 'pinging' issue.

[Joystick]

Pinging: Yes (mainly between 2-3k rpm)
Build Date: JUN/2008
Milage: 1,040km
Auto/Manual: Auto
Petrol: 98RON
Style: Varied

[Tarsnakes]

Pinging: Yes 2-3K rev range (Typically under load- eg uphill or AC on)
Build date: 11/2008
Milage: 3,000km
Auto/Manual: Auto
Petrol: 98 RON Mobil
Style: City driving

[OZEuromania]

Pinging: YES
Build Date: 05/2008
Mileage: 6500 kms
Auto/Manual: Auto
Petrol RON: 98, BP Ultimate or Shell Vpower
Style: Smooth + a bit accel

[swork]

Pinging: YES
Build Date: 05/2008
Mileage: 11000 kms
Auto/Manual: Auto
Petrol RON: 98, vortex 98 or BP Ultimate
Style: cruising, dont drive it that hard

[EH VTi]

Pinging: NO
Build Date: July 2008
Mileage: 8500km
Auto/Manual: Auto
Petrol RON: 95 with occaisional 98
Run in Style: Basically got and drove it like I drive my V8. A good mix of light and heavy throttle

[RIDLEY]

Pinging: YES
Build Date:June 2008
Mileage:9558km
Auto/Manual:Atuo
Petrol RON:BP Ulitmate
Style:Normal

[H.T]

I know that this thread is for data purposes and the mods can feel free to delete this post but I thought I would throw something up for you all to think about.

I am not a mechanical engineer or engineer of any sort, so don't shoot me down, but this is just a thought;

A conventional gasoline engine usually has say a alloy head and cast iron exhaust manifold that is sometimes connected flush to the heat without a gasket, sometimes with a gasket in between, no doubt these two have different properties in the way they are made up and in there molecule structure and have different heating/cooling characteristics....

I was informed that the head and the exhaust manifold are actually one piece on these motors now, despite being a carry over from the previous model.

The point I am trying to get to is, could it be possible that as it is ALL the same piece of alloy, could some of the heat that is meant to exit through the exhaust system be transferred back into the area of the head around the cylinder chamber and be causing the pre-ignition? I remember years ago coming across a crysler/mitsubishi motor that would develop a hot spot in the head and this would cause pre-ignition and even running on to an extend.

Again, I could be completely off track here, but these engines have that many sensors that if it had been a computer/software problem surely it would be able to rectify it....

[buddah51au]

I know that this thread is for data purposes and the mods can feel free to delete this post but I thought I would throw something up for you all to think about.

I am not a mechanical engineer or engineer of any sort, so don't shoot me down, but this is just a thought;

A conventional gasoline engine usually has say a alloy head and cast iron exhaust manifold that is sometimes connected flush to the heat without a gasket, sometimes with a gasket in between, no doubt these two have different properties in the way they are made up and in there molecule structure and have different heating/cooling characteristics....

I was informed that the head and the exhaust manifold are actually one piece on these motors now, despite being a carry over from the previous model.

The point I am trying to get to is, could it be possible that as it is ALL the same piece of alloy, could some of the heat that is meant to exit through the exhaust system be transferred back into the area of the head around the cylinder chamber and be causing the pre-ignition? I remember years ago coming across a crysler/mitsubishi motor that would develop a hot spot in the head and this would cause pre-ignition and even running on to an extend.

Again, I could be completely off track here, but these engines have that many sensors that if it had been a computer/software problem surely it would be able to rectify it....

Let me just say that all 2006 on FD1 & FD2 Civics have the Exhaust Manifold cast into to Cyl Head the same as the the current K24Z3 in the CU2, yet no such problems exist in the Civic. Mind you, they do not run 11:1 compression ratio.
Post combustion ignition within the Exhaust manifold is nothing new. There have been several model cars over the years that have had this problem occurring.
In my belief if this was the actual problem All K24Z3 engines would be effected, not just a few which is the case. I could use the same argument & suggest that if it was an actual pinging problem in theory it would be more pronounced on vehicles with a manual transmission as owners would tend to labour the engine more (not downshifting soon enough) which would place more load on the engine, subsequently increasing the chance of pinging. Pre Ignition has usually been associated with high load / low RPM.
I still believe it is a problem associated with the timing chain / tensioner, but again if this was the case one has to ask why Manual Transmission vehicles don't appear to be effected? Could it possibly be something within the Torque Converter or an Auto Trans problem?
All we can do is wait for Honda HQ to find the problem so that effected vehicles can be rectified.
I have no such problem in my CU2 Auto, & 2 others that I know of personally are not effected either. It will be interesting to find out what the problem is eventually.

[H.T]

Pinging: YES
Build Date: Jun 08
Compliance: Feb 09
Mileage: 1600
Auto/Manual: Manual
Petrol RON: 95 to 98
Style: Everyday car, mostly city driving with occasional freeway run.

[OranparkAddict]

Pinging: YES. Entire rev range worst above 2000rpmish
Build Date: earlyish
Compliance: Jul 08
Mileage: 29000km
Auto/Manual: auto
Petrol RON: shell v-power
Style: Everyday car, rural roads