[drivingagain]

This is why I love the fact the manuals will not have afm. Correct me if I am wrong. Although I would have tuned it out. Not enough gas mileage difference for me to worry about the engine later.

[whiteboyblues2001]

Originally Posted by GMGP5X

Sea foam is great but with D.I. it will not help the intake system.

I'm not talking about the liquid you put in the gas tank, I'm refering to the spray you spray into the intake system. The spray can comes with a special hose you put between the intake manifold and the plastic tube that comes from the air cleaner box (right in front of the throttle).

[xgnxs]

Originally Posted by drivingagain

This is why I love the fact the manuals will not have afm. Correct me if I am wrong. Although I would have tuned it out. Not enough gas mileage difference for me to worry about the engine later.

The manuals will have the AFM hardware, it's just tuned out, apparently. Personally, I'd prefer one or the other (AFM hardware, AFM enabled OR AFM disabled because no AFM hardware).

[drivingagain]

yes the hardware is there but not functioning. Hence does not do anything. Other than the couple lbs of weight maybe there is no difference between it not being there. Although when it becomes more reliable and people really want you can tune it back in. Maybe help resale. People buy anything you hype up enough. ALthough the new fix could solve the oil in the intake problems that have ruined prior engines and there is no downside.

[SuperSound]

Just to be clear...AFM has nothing to do with the DI issues in this thread or the need for oil separators/catch cans.

[KMPrenger]

Originally Posted by drivingagain

This is why I love the fact the manuals will not have afm. Correct me if I am wrong. Although I would have tuned it out. Not enough gas mileage difference for me to worry about the engine later.

Both engines use DI technology, so manual or automatic should not matter in the sense. Valve build up can happen for both. AFM issues is a separate subject, unless I just am not understanding the link between the two.

I for one am VERY GLAD that GM has put time and effort into helping alleviate this issue. I think we all should be!

A catch can may not even be necessary, or very helpful, but time will tell. I do think doing whatever we can to help the issue is worth it though...I ran a CC on my 2010 V6.

[Stex]

Originally Posted by SuperSound

Just to be clear...AFM has nothing to do with the DI issues in this thread or the need for oil separators/catch cans.

Not totally accurate. PVC design affected by AFM that had to be repaired by GM under warranty (if lucky to be in warranty) caused major damage to the 2007=2012 5.3s.

The AFM and PVC design allowed heavy oil vapor to pass thru the PVC system, thru the intake and deposited oil on the rings. This leads to major oil burn. They had to replace the valve cover, pull the pan for a baffle change and replace pistons/rings. A catch can would have possibly avoided all this.

Has GM fixed the PVC/AFM issues? I see no threads on the 5 gen autos burring oil. So maybe. As one that has been thru the above nightmare, a catch can is cheap extra protection against that AND the DI valve problem. Not going to trust GMs shot at a catch can.

As an aside, Hopefully the AFM lifter issue is behind us too. Not seeing any threads on 5 gens having AFM lifters fail.

[joemosfet]

Originally Posted by Ragnar

On your car there is a clean side and dirty side.

Interesting.

On my old 5.1 HEMI, both valve covers had a breather to the intake, and both benefited from catch cans, as they both sucked up a bit of oil.

On the 6.1, the passenger side had a PCV valve, and maybe could run with only one catch can?

What makes one side clean and one side dirty?

[GMGP5X]

Originally Posted by whiteboyblues2001

I'm not talking about the liquid you put in the gas tank, I'm refering to the spray you spray into the intake system. The spray can comes with a special hose you put between the intake manifold and the plastic tube that comes from the air cleaner box (right in front of the throttle).

I quoted Curr. So I was replying to what he said. The seafoam you hook to the intake my help with the valve build up problem if done frequently. Hope GMs new valve covers are the solution for this problem though.

[SuperSound]

Originally Posted by Stex

Not totally accurate. PVC design affected by AFM that had to be repaired by GM under warranty (if lucky to be in warranty) caused major damage to the 2007=2012 5.3s.

The AFM and PVC design allowed heavy oil vapor to pass thru the PVC system, thru the intake and deposited oil on the rings. This leads to major oil burn. They had to replace the valve cover, pull the pan for a baffle change and replace pistons/rings. A catch can would have possibly avoided all this.

Has GM fixed the PVC/AFM issues? I see no threads on the 5 gen autos burring oil. So maybe. As one that has been thru the above nightmare, a catch can is cheap extra protection against that AND the DI valve problem. Not going to trust GMs shot at a catch can.

As an aside, Hopefully the AFM lifter issue is behind us too. Not seeing any threads on 5 gens having AFM lifters fail.

Good to know, but that has nothing to do with DI issues being discussed. They affect all DI engines, many without AFM. My point was to make sure no one confused having/not having AFM would prevent them from experiencing these issues. What you describe is an oil deposit issue due to the PCV system, not because the engine is DI.

[joemosfet]

Originally Posted by SuperSound

Good to know, but that has nothing to do with DI issues being discussed. They affect all DI engines, many without AFM. My point was to make sure no one confused having/not having AFM would prevent them from experiencing these issues. What you describe is an oil deposit issue due to the PCV system, not because the engine is DI.

Plus, I don't understand what the AFM system has to do with the PCV system...

[Stex]

Originally Posted by joemosfet

Plus, I don't understand what the AFM system has to do with the PCV system...

If you had a 2009 GM 5.3 you would. The defect was interrelated as explained to me by the GM folks. The pvc pickup to the intake is in the valley cover with the afm solenoids. Trucks without the AFM, 6.2, did not suffer the oil burn etc...and did not get the repair. 5.3s before AFM did not have the issue.

[iPODFAN11]

Originally Posted by whiteboyblues2001

Hopefully it will work as advertised. I believe the new system is integrated under the valve covers. I also hope that if it doesn't work good enough, that a catch-can can still be installed easily enough. Otherwise, I would suggest Seafoam.

All Gen 5 small blocks run the valve cover deal. Gen 6 Camaro has this oil/air separator IN ADDITION to the oil/air separators built into the valve cover.

The LT1 Camaros are the first and only application for this new feature. I am not 100% on the set up yet but it appears to be an OEM designed catch can. Has a dirty air inlet, clean outlet but any oil it catches gets drained to the oil pan via a direct tube to the pan.

[rtcat600man]

Even with all the extra built into the engine to help the DI and oil in the intake, I for one will be watching this closely and will not hesitate to add a catch can to my 2017, along with an oil seperator on the clean side if necessary.