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Camaro V6 LFX Engine, Exhaust, and Bolt-Ons For all LFX related parts

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Old 05-21-2013, 09:17 PM   #1
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My Dirty, Dirty Intake (Pic Heavy)

UPDATED 06/22/2013: See the bottom of this post.

So, I bought my car used with ~26,000 miles on it a couple of months ago. Since then, I've put about 3000 miles on it. I just recently installed an RX catch can and breather, so the car went about 28,375 miles without one.

As an aside: Big shout out to Tracy/SC2150 from RevXtreme. I bought my cc/breather used from a C5 member. It came with an older bracket that was first used on the LLTs, and didn't fit my LFX application. Tracy sent me a new bracket, free of charge, and took the time to give me some advice on cleaning the used items prior to install. He did all this for a customer that wasn't even buying from him, and from whom he didn't make a dime. Many thanks!!

OK, back to my dirty story.

Before installing my catch can and breather, I pulled my intake air tube and throttle body off to try to snake a cheap borescope I bought into the IM and hopefully get a look at my intake valves without pulling the whole manifold off. I wasn't able to get the scope to twist into the intake runners and see the valves, but I did find oil in my intake tube (coming from the "clean side" connection), and some oil in the reservoir that's molded into the IM right behind the throttle body:





You can see in the second pic above how the inside of the IM is coated with a shiny film of oil. The borescope also showed congealed globs of oily gunk in the manifold, too. Yuck.

I also found my throttle body to be dirty, too:



So after that I installed the CC/breather, and yesterday I followed Intensifi's excellent DIY on pulling the IM for cleaning, and pulled off my TB and IM to finally clean them and get a good look at how dirty and carboned up the intake valves have become, and here's what I saw:

Dirty throttle body (still, never cleaned it):



Oily underside of IM:



Oily/gritty intake runner openings:







And, finally, my intake valves:













Except for that one cylinder, they're not horrible...but that one is pretty dang bad.

So, my plan is an experiment. I have been doing some data logging of my "dirty" engine, and now I've confirmed just how dirty it really is. Step 2 will be to do a Seafoam treatment of the engine. Then I plan to pull the IM again and see just how effective it was at cleaning the valves. If it's still dirty, I will do the manual cleaning as described in Intensifi's DIY, then do some follow-up data logging and see if there are any significant changes.

UPDATE #1: Did a Seafoam treatment, described in this post.

UPDATE #2: Rechecked the intake/valves after Seafoam, and manually cleaned them. See this post.
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Last edited by 911medic; 06-22-2013 at 04:02 PM.
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Old 05-21-2013, 09:24 PM   #2
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Old 05-21-2013, 09:50 PM   #3
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Please post with results this may be possible "sticky" potential imo
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Old 05-21-2013, 09:55 PM   #4
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Originally Posted by ICTsccaCamaro View Post
Please post with results this may be possible "sticky" potential imo
Will do. You'll have to be patient, though, as my spare time to work on this stuff is very limited, especially this time of year with three boys playing baseball at the same time (in different locations).
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Old 05-21-2013, 10:32 PM   #5
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And this is why boys and girls you need a catch can!
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Old 05-21-2013, 10:54 PM   #6
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Quote:
Originally Posted by KaBoom1701 View Post
And this is why boys and girls you need a catch can!
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Old 05-21-2013, 11:47 PM   #7
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Welcome to the "dark" side.

You'll have it all "clean" in no time!

P.S. thanks for the kind words!
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Old 05-21-2013, 11:53 PM   #8
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Just wow!
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Old 05-22-2013, 05:33 AM   #9
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This is going to be good.



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And this is why boys and girls you need a catch can!
Exactly.
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Old 05-22-2013, 02:07 PM   #10
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Wow.... that is alot of crap on that one valve!!!
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Old 05-22-2013, 03:19 PM   #11
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This is going to be good.

Best Emoticon ever!!!! Beats the heck out of this little guy:
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Old 06-05-2013, 10:21 PM   #12
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june update for us?
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Old 06-06-2013, 11:11 AM   #13
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Sorry, haven't had time to seafoam/pull it apart again. Maybe in a week or so. Super busy with work/family/projects.

It's still in the works, though. Haven't forgotten about it.
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Old 06-06-2013, 04:36 PM   #14
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Hello !

that carbon suit is NOT coming completely from the burned OIL ... ALL DFI engines have that Problem !

1) from the EVAP System there is always a Little bit of oil and condensate transfered into the engines combustion area .... BUT the intake valves were the cold parts of the engines valvetrain so the oil and condensate CAN PHYSICLY NEVER burn to ashes at the cold intake valves ! !

2) the DFI process is creating lots of carbon suit during the combustion and during the nessesary valve overlap .. were INTAKE and EXHAUST valves BOTH open and covered with the carbon suit ... BUT the exhaust valves get HOT enough to burn the carbon suit ... so at all DFI engines you see dirty intake valves and not so dirty exhaust valves !

3) all old style intake manifold injection engines clean the INTAKE valves automaticly by the fuel spray into the cylinder ... old Technology .. but cleaner Intake valves !

Good examples you find around the world in all Forums about DFI engines ... here a 98kmiles driven Golf TFSI :

http://i483.photobucket.com/albums/r...valvedirt3.jpg

and Porsche Cayenne DFI V8

http://i46.photobucket.com/albums/f1...offman_001.jpg

http://i46.photobucket.com/albums/f1...offman_003.jpg

So Google yourself and you will find many examples from ALL worldwide DFI engine manifactures !

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Old 06-06-2013, 06:10 PM   #15
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This is a very interesting thread. I think I will subscribe!!


Quote:
Originally Posted by ASH@IPF-TUNING View Post
Hello !

that carbon suit is NOT coming completely from the burned OIL ... ALL DFI engines have that Problem !

1) from the EVAP System there is always a Little bit of oil and condensate transfered into the engines combustion area .... BUT the intake valves were the cold parts of the engines valvetrain so the oil and condensate CAN PHYSICLY NEVER burn to ashes at the cold intake valves ! !

2) the DFI process is creating lots of carbon suit during the combustion and during the nessesary valve overlap .. were INTAKE and EXHAUST valves BOTH open and covered with the carbon suit ... BUT the exhaust valves get HOT enough to burn the carbon suit ... so at all DFI engines you see dirty intake valves and not so dirty exhaust valves !

3) all old style intake manifold injection engines clean the INTAKE valves automaticly by the fuel spray into the cylinder ... old Technology .. but cleaner Intake valves !

Good examples you find around the world in all Forums about DFI engines ... here a 98kmiles driven Golf TFSI :

http://i483.photobucket.com/albums/r...valvedirt3.jpg

and Porsche Cayenne DFI V8

http://i46.photobucket.com/albums/f1...offman_001.jpg

http://i46.photobucket.com/albums/f1...offman_003.jpg

So Google yourself and you will find many examples from ALL worldwide DFI engine manifactures !

Greets ASH@IPF-TUNING
Hi Arno...thanks for the extra information. In your opinion, should DFI engines be cleaned every so often to improve performance?

Should a catch can be used to help stop or slow down the oil injection?

Thanks.
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Old 06-11-2013, 04:15 PM   #16
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Hi !

all the carbon suit is coming 99% from the DFI combustion process ... the burned oil is only a very Little part of it !

Greets ASH@IPF-TUNING
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Old 06-11-2013, 05:08 PM   #17
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Quote:
Originally Posted by ASH@IPF-TUNING View Post
Hi !

all the carbon suit is coming 99% from the DFI combustion process ... the burned oil is only a very Little part of it !

Greets ASH@IPF-TUNING
Not picking on spelling. Do you mean carbon soot?

If you are correct, this is a direct challenge to the need for a catch can. Tracy (RX) and Steve (Elite) will need to weigh in on this. Sounds like a lively debate is at hand.
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Old 06-11-2013, 05:18 PM   #18
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Ok, Been waiting for this, Seafoamed three vehicle this weekend
A 1998 GMC Sonoma 160,000
A 2001 Pontiac Montana 76,000
And My 2010 Camaro 46,000

Just the Camaro has a Catch Can

We had a lot of Smoke out of the Sonoma & Montana none really out of the Camaro
All three run Better with a slight increase in Gas Mileage
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Old 06-11-2013, 08:08 PM   #19
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Spyder, did you change the oil afterwards? I'd be concerned about leak-down past the rings diluting the engine oil.

John B.
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Old 06-11-2013, 08:46 PM   #20
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Its due to go in for a oil change this week, and btw it said would not hurt the oil. But again it's going in this week.
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Old 06-11-2013, 08:48 PM   #21
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We have a LLT with 64k miles on it with a RX catchcan on since nearly day one....absolutely NO intake valve coking.....and we see the results daily.

Yours is about the cleanest I have seen at that mileage except the one, that is how most look.

Here is a link to pictures submitted by techs from every DI engine in the world pretty much (including motorcycles) and with over 12,000 of the RX cans in use there are hundreds of members here that can show the results.

http://www.google.com/search?q=intak...w=2021&bih=875

Take the time to look at these pictures.

99% plus of the valve coking is a direct result of the oil ingestion via the PCV dirty side, and if you use a oil separating catchcan that actually catches and traps all, or nearly all the oil, then you have zero issues (again, hundreds of members here can remove there intake manifolds and show this).

Now, install the average can and 99% of them let 1/2 or more of the oil still pass through (no matter the name brand) so you have only 3-4 on the market that actually do trap all, or nearly all the oil.

If you click on this thread, part way down the page are most of the cans people buy today with cut aways or disassembled to show what is (or is not )inside of them plus a explanation of the testing results of what percentage pulls through most cans and why they do, or don't work well.
http://www.camaro5.com/forums/showth...=265217&page=3

Pretty much the RX, Elite, and Saiku Micchi are the ones that trap all or nearly all (no, Elite does not pay me a commission, I report the actual testing and the results).

In the days of port injection, running a top tier fuel would keep the intake valves (and the area of the port the spray makes contact wife) clean. Look at a shell commercial to see the pictures of a old port injection engine valve run on a cheap fuel VS their techron.

Now with direct injection, no fuel touches the intake valves...only the air charge passes it so there is no difference in running a top tier vs a cheap (all come from the same bulk freighters here at the port of Manatee near us and the end user (shell, mobil, etc.) add the additives before delivery to the station).

So, as long as you have 1-2 qts of oil ingesting through the dirty side of the PCV system, you will always have the severe valve coking we see on ALL DI engines. Audi's V8 does have a secondary port injector to help eliminate the low RPM hesitation inherent with DI, but it only slightly reduces the coking.

You can also see the results of running a RX catchcan vs no can, or even one of the cheap ebay ones (or an expensive billet can with a poor design allowing oil pull through):

Anyone with a LS3/L99, remove your TB and look inside your IM and see what is ingesting. This car came the next day after delivery from the dealer:


Picture of SC and housing using a RX catchcan from day one for 16,000 miles VS a intercooler after 14,000 miles w/no can:









Scouring on pistons from carbon breaking loose:


Oil ingestion causes buildup on the piston rings and ring lands preventing them from moving freely to properly seal...resulting in loss of power and excess oil consumption:



Actual pictures from GM TSB:




Intake from LLT on left w/can from new, right w/out:



On any FI engine, the detonation caused by the oil ingestion results in a good deal less power than the same one with the oil ingestion stopped.

And, for those that delete the PCV systems function, then engine damage and premature wear is the result.

As part of the combustion process there is a good deal of pressure, or "blow by" that gets past the piston rings into the crankcase, and this is made up of several damaging compounds that if not evacuated while still in a gaseous, or suspended state, will condense and settle into the engine oil and on the internal parts when the engine cools down after shut down.

These consist of water, unburnt fuel, abrasive carbon particles (many to small for the oil filter micron size to remove and trap so they continue to circulate with the engine oil wearing your engine prematurely), sulfuric acid (which etches the crank & cam journals and bearing surfaces once they reach a certain PPM) and other damaging hydrocarbons, etc.

A PEM PCV system uses the intake manifold vacuum to evacuate these damaging compounds while the clean side provides filtered metered fresh air to make up for what is evacuated.

Ideally you want filtered fresh air entering one bank of the engine (on the V6 it is the rear of the drivers side valve cover) where it passes the valve train, is pulled down into the crankcase, all the while flushing the damaging compounds out with it while they are still suspended any time the engine is running. They then travel up the passenger side bank, past the valvetrain and out the rear of the passenger side valve cover where the intake manifold vacuum pulls the compounds into the combustion chamber to be burnt and further burnt clean in the catalytic converter. The issue is the oil most pulled in with this.

Now, if you delete this function, or break this flow (by just adding breathers to release pressure or take the clean side and dirty side and run both lines into a single can, you then are only relieving the pressure. Every time the engine is shut down and cools, all these damaging compounds condense and fall into the oil where they cannot be removed without changing your oil and the concentration accumulates and increases with every start up and shutdown. That can shorten engine life by 1/2 to 1/3rd what it would live with proper evacuation.

Also, every street legal gasoline car and light truck sold in the US today has a functioning PCV system that evacuates and flushes the crankcase for long engine life.

ANY deletion or disabling of this function will result in premature wear and is also grounds for any manufacturer to void a warranty when such an important system is disabled.

A proper catchcan system simply installs inline on the dirty side to trap this oil mist causing all the issues and does not effect the evacuation process......but far to often we see those that do not understand this aspect of the PCV system and only think of the obvious...the crankcase pressure.

So, you do NOT want oil in the intake air charge. You do NOT want to delete or disable the PCV systems evacuation process with a separate clean side source and a dirty side. You NEVER want to mix the clean and dirty sides (this defeats the PCV systems function, and you can stop all, or nearly all intake valve coking with one of the few truly functional cathcans on the market.

And there is so much misinformation and misunderstanding of the PCV systems functions, that you do well to study all I have posted here.

:thumnbsup:


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Old 06-11-2013, 08:56 PM   #22
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Anyone wanting more actual pictures, etc. just ask....and this is a typical letter/email/message we get from those that do install the RX can:

Hey Tracy, Just wanted to thank you, and everyone at RevXtreme. I bought a catch can from you, for my 2005 CTS. Well since installing it i'm not consuming any oil anymore. I've had a close eye on the oil level since i have installed it and it hasn't used a drop. I don't know how or what that catch can has done to prevent the oil consumption. (I've read your tech tips article and understand the concept of how a catch can work.) I guess i am just baffeled that it something so simple like that could work.

Anyway just wanted to thank you. I was at my last wits end with this car and was about to put it back on the market, after the dealer replaced two motors under warrenty.

I'll be purchasing another catch can from you in the future. I have a 2000 Camaro SS that is getting a turbo as we speak, as a fun project street car.

But thanks again. It was definetly worth the wait.

Gabe Moulden


This customer was lucky that the gummed up ringlands were able to free themselves after adding the can and stopping the oil ingestion....something that we see only app 50% of the time.

A proper catchcan will also eliminate the need for a seafoam or upper induction cleaning ever if installed when new.

We see on average 1-3 MPG improvement with a good can as the detonation caused by the oil ingestion is no longer present so the ECU/PCM can keep the ignition timing at the optimum level.

We have many small fleet owners as customers (AC/plumbing, etc.) that have them installed just for the fuel savings, not for extended engine life.

12 years of manufacturing these and over 12,000 in use around the world.
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Old 06-11-2013, 09:14 PM   #23
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Oh, and one last link for info confirming all I have posted for any doubting this from the University of Maine's Engineering department:

http://umaine.edu/met/capstone-proje...arator-team-2/
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Old 06-11-2013, 10:52 PM   #24
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So Tracy in other words you are strongly disagreeing with ASH's assertion that the carbon buildup on the valves is from combustion by products (e.g. carbon soot)???

When I have looked at the pics of other LLT and LFX engines that HAVE NOT had Seafoam or BG 44K treatments, the valves appeared "wet" with oil. That makes me believe the buildup is from the ingested oil, not combustion by products.

But what do I know? I'm an electrical engineer, not a mechanical or chemical engineer.
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Old 06-12-2013, 08:54 AM   #25
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100% sure. This is my field of expertise for over 38 years, and the oil puddles in the intake show it all. Also, the fuel system evap emmissions only draws in fuel vapors...they burn clean.....but read all in detail and the links to back it all up.

Since they are not allowed to attack the turbo and supercharger solutions we develop this seems their next tactic. But it is pretty embarrassing to be that clueless on something so well documented for so many years by so many (such as the University of Maine study and all the TSB's from all auto manufacturers).

I want no fight, no attacks.....just all do what we do best and offer the most accurate and correct info possible with the documentation to back it up.

There is no place for drama on this or any forum IMHO. The market is huge for all.

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