Anybody truely figured out the PINGING issue with the late 5.9's?

[Motorhead]

My '07, 5. 9, G56 pings at mid throttle especially when towing in altitude. I have adjusted my Smarty jr to all timing ranges and even stock. I just replaced the FCA before the trip I am on now (South Lake Tahoe). I have just under 60,000 miles on it. It idles great especially since the FCA replacement. It starts immediately every time. I run the truck aggressively so I know it isn't all carboned up.
I am worried that it could harm the pistons. Yeah I know they are heave duty.
So... ... ..... Has anyone positively figured out this issue? What did you do??

 

[SpeedBeef]

My 06 has 87K and does the same thing. It is stock, with the exception of a Magnaflow 4" exhaust. It starts quick, idles just fine, has great power, and decent fuel economy. I turn up the radio and ignore it.

 

[jgillott]

The short answer is no. I don't believe that anyone has been able to determine what is going on. For what it's worth, my '07 (Oct '06 build) has had a mild case of it since the day it rolled off the transporter. In fact, that sound and a really, really stiff trans almost kept me from taking delivery at the time. I obviously purchased it anyway knowing that it was already too late to order another 5. 9L. The sound and conditons that it happens haven't changed in the 63K I've put on it. The truck runs very strong, oil samples come back perfect, etc.

Our '04. 5 has never produced that sound.

 

[gerry]

I always thought the 2004. 5 motor was the same engine as made through early 2007 but maybe not. Anybody know one way or the other?

 

[AH64ID]

I think it has to do with the "in-cylinder" EGR. I used to rattle a little, and since the cam/turbo swap it's gone. The cam changed it a little, but the turbo made a huge difference. So I believe it was caused by the dirty air in the cylinder.

 

[Wayne M.]

I always thought the 2004. 5 motor was the same engine as made through early 2007 but maybe not. Anybody know one way or the other?

I have a '04. 5, a coworker has an '06, and even at idle, parking and such, I can hear a slight difference. I had no idea about the pinging, I'm going to ask him- probably never noticed it before.

It's most likely the "tune" aka injector timing and maybe the cam timing. I'm sure Mr. Donnely has the skinny on cam specs. It indeed is the same basic engine. One difference I know is the Injector harness/ valve cover connections.



Just an example how a different tune of the same engine can change it's personality;

We have a fleet of Mack MP7 2007 emission trucks. They are EGR/ DPF non SCR (urea injection) engines. They are noisy, smelly, troublesome engines- many EGR/ DPF troubles, not real happy with them. We recently got some 2010 emission spec MP7's in exactly the same truck. It appears the same but has SCR. From what I've been told there is a different tune. It's REAL obvoius. They are much more trouble free, smoother, and practically silent. I had to jack the cab to see it was still the same engine because it ran so different from the 2007. They are much more trouble free as I understand there is less EGR mixing, and less regenerations.

 

[AH64ID]

The 04. 5-07 motors are nearly identical, mechanical and tune wise. The big difference is the valve and valve lash in 06-07, and the wiring.

 

[Motorhead]

I think it has to do with the "in-cylinder" EGR. I used to rattle a little, and since the cam/turbo swap it's gone. The cam changed it a little, but the turbo made a huge difference. So I believe it was caused by the dirty air in the cylinder.

Interesting... ... ... What turbo are you running?
I am waiting to be out of warranty (7yr-100000mi) before doing much more to the engine. Does your oil run cleaner longer now with the different cam?
I have a question about air saturation in the fuel before it is pressurized to the fuel rack. Anyone running an Air Dog and noticed less pinging?

 

[AH64ID]

Interesting... ... ... What turbo are you running?
I am waiting to be out of warranty (7yr-100000mi) before doing much more to the engine. Does your oil run cleaner longer now with the different cam?
I have a question about air saturation in the fuel before it is pressurized to the fuel rack. Anyone running an Air Dog and noticed less pinging?

I am running a Garrett Stage 2, GT3782R. It cut the back pressure in half, or more.

How did you get a 7/100 on your engine? That was dropped in 2006 (2005 was the last to have it).

 

[JFought]

motorhead. um. . very slightly less pinging. (not worth the purchase just to get slight reduction of noise)



Yes i still have it, but reduced the noise like 3% with the air dog install.



(i have also been very curious to the cause as everyone else. )

 

[Motorhead]

How did you get a 7/100 on your engine? That was dropped in 2006 (2005 was the last to have it).

I purchased the Chrysler 7/100 extended power train warranty. After seeing and hearing the dealer nightmares, I hope I'll never need it!
What do you mean by "It cut the back pressure in half, or more"

My Father worked at Garrett Airesearch post WWII til 1986. He did some prototype work on early Garrett turbos. Thanks for info from both AH64ID and [FONT=Tahoma, Calibri, Verdana, Geneva, sans-serif]JFought[/FONT]
Jessie, did you install your TIPM Saver yet?

 

[Bob4x4]

He probably meant to say drive pressure... ... ... ...

 

[AH64ID]

What do you mean by "It cut the back pressure in half, or more"

The exhaust back pressure, or drive pressure, on the stock turbo ran at about a 1. 5-2:1, with the new turbo its about a . 7-. 8:1. On the stock turbo I would pull hills at about 25-30 psi of boost and 35-45 psi of drive pressure. Now I pull hills at 24-28 psi of boost and 18-24 psi of drive pressure.

A lower restriction in the exhaust means the exhaust leaves the cylinders easier, and more air is moving thru the cylinder. This is also represented with lower boost and lower EGT's.

 

[Motorhead]

The exhaust back pressure, or drive pressure, on the stock turbo ran at about a 1. 5-2:1, with the new turbo its about a . 7-. 8:1. On the stock turbo I would pull hills at about 25-30 psi of boost and 35-45 psi of drive pressure. Now I pull hills at 24-28 psi of boost and 18-24 psi of drive pressure.

A lower restriction in the exhaust means the exhaust leaves the cylinders easier, and more air is moving thru the cylinder. This is also represented with lower boost and lower EGT's.

So does the engine now run with overall LOWER boost pressure AND lower EGT's?

 

[Regcabguy]

My aftermarket exhaust is a bit louder than stock,but my truck really doesn't sound much different than a friend's '03. I'm kind of towing most of the time with the camper and am not aware of a mid-throttle pinging. Smarty timing is on default with the K01 update. But then I can't hear a whole lot over the roar of the MT's.

 

[AH64ID]

So does the engine now run with overall LOWER boost pressure AND lower EGT's?

For the most part yes. The EGT's are a little warmer at some partial throttle (5-6 psi) positions, but that is probably from the exhaust manifold blanket.

Peak boost is down, peak EGT's are down, fueling is up.

 

[JFought]

yes I love that TIPM saver!!! Thanks again!!

I just wish that it is more available for more guys.



(theres a few recent posts with guys that should have them on their truck. )

 

[RBellah]

The 04. 5-07 motors are nearly identical, mechanical and tune wise. The big difference is the valve and valve lash in 06-07, and the wiring.

Has anyone check the part numbers for the 2006 cam to see if it is the same?



Where is MWILSON he can lookup these parts better than anyone I have seen.

 

[AH64ID]

The cam's are the same.

 

[darkhorse_05]

"TIPM Saver installed" Stupid question but wht is this TIPM??