Catch Can For NA C7
Safety Car
Joined: Feb 2013
Posts: 4,875
Likes: 1,174
I checked my Z51 last night and I was bone dry too with the dry sump. I have driven the car pretty hard and it has been fine so far. As you note, don't overfill the dry sump and you are probably fine.
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
Instructor
Joined: Apr 2009
Posts: 169
Likes: 9
From: Interior B.C.
nice C6 you have there. catch cans work on the ls motors for sure......the C7 does not have an LS motor. things change. the pcv system is night and day different now.
Thank you, I stand corrected with respect to the oil vapor threat on a C7.
Thank you, I stand corrected with respect to the oil vapor threat on a C7.
Intermediate
Joined: Dec 2013
Posts: 37
Likes: 0
Probably fine on clean side oil separation that is. As noted above, the jury's still out on the need for a catch can which doesn't have anything to do with dry sump oil puking but rather addresses dirty side PCV emissions into the intake.
Burning Brakes
Joined: May 2008
Posts: 1,146
Likes: 28
From: Aledo, TX
I think this is more of a direct injection issue, leading to coking on the valves. BMW's almost all need to run catch can's or are needing to have their intake manifolds removed to clean them eventually.
The Catch can helps with this more than anything, Almost every modern DI car can benefit for this reason alone.
The Catch can helps with this more than anything, Almost every modern DI car can benefit for this reason alone.
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
I think this is more of a direct injection issue, leading to coking on the valves. BMW's almost all need to run catch can's or are needing to have their intake manifolds removed to clean them eventually.
The Catch can helps with this more than anything, Almost every modern DI car can benefit for this reason alone.
The Catch can helps with this more than anything, Almost every modern DI car can benefit for this reason alone.
outside of the dry sump puke issue, has anyone had oil in their intake manifold due to the pcv system itself (the u tube).
Burning Brakes
Joined: May 2008
Posts: 1,146
Likes: 28
From: Aledo, TX
I installed Catch cans in all my DI cars, Audi, BMW they all have the same problems. I can't imagine it will be any different for GM. It can't hurt, the proof is in what you pull out of them every oil change.
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
Let's be honest, a catch can is not expensive or permanent. If it makes you feel good, put one in!
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Burning Brakes
Joined: Jan 2004
Posts: 1,158
Likes: 6
From: Winter Springs Fla
Catch cans are not really for brand new cars .
A new well built STOCK motor will have such minimal blow by , a catch can is not needed .
If you are going to drive your new corvette on the weekend , put 10k miles on it then sell it , you don't need a catch can , Ever .
If you are going to mod your new vette and start making bigger hp
numbers you are going to have more blowby and your not going to want that oil diluting you octane levels , Period
A new well built STOCK motor will have such minimal blow by , a catch can is not needed .
If you are going to drive your new corvette on the weekend , put 10k miles on it then sell it , you don't need a catch can , Ever .
If you are going to mod your new vette and start making bigger hp
numbers you are going to have more blowby and your not going to want that oil diluting you octane levels , Period
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
Catch cans are not really for brand new cars .
A new well built STOCK motor will have such minimal blow by , a catch can is not needed .
If you are going to drive your new corvette on the weekend , put 10k miles on it then sell it , you don't need a catch can , Ever .
If you are going to mod your new vette and start making bigger hp
numbers you are going to have more blowby and your not going to want that oil diluting you octane levels , Period
A new well built STOCK motor will have such minimal blow by , a catch can is not needed .
If you are going to drive your new corvette on the weekend , put 10k miles on it then sell it , you don't need a catch can , Ever .
If you are going to mod your new vette and start making bigger hp
numbers you are going to have more blowby and your not going to want that oil diluting you octane levels , Period
Burning Brakes
Joined: May 2008
Posts: 1,146
Likes: 28
From: Aledo, TX
Well I plan on modifying my car just like every car I have owned. Maybe that is the problem with the approach to this thread. We have a lot of Corvette owners who think a performance modification is adding All Season Tires.
I have a CAI, Headers and a tune going on my car right after break in, and plan on using at the track all summer long.
I have a CAI, Headers and a tune going on my car right after break in, and plan on using at the track all summer long.
Burning Brakes
Joined: Jan 2004
Posts: 1,158
Likes: 6
From: Winter Springs Fla
Not until you have 30-50k or so miles on the rings and notice blowby or add a cam or a forged bottom end or FI , then you will need a catch can .
Burning Brakes
Joined: Mar 2013
Posts: 896
Likes: 38
From: Camarillo California
Gentlemen,
Forgive me for reviving an aging thread, but I am hoping to be educated on a catch can issue. I am one of those that has discovered considerable oil in the rubber and plastic structures leading from the air filter box to the throttle body. To wit:
I had hoped to address the issue with a catch can, but as I look at where the can is situated, it really doesn't look like it serves this purpose. Looking at the pictures of KenHorse's install (thanks, by the way), it looks like the can simply intercepts vapors going from the crankcase back into the intake manifold:
If that's the case, I don't think a catch can would help my problem. Do you agree?
Forgive me for reviving an aging thread, but I am hoping to be educated on a catch can issue. I am one of those that has discovered considerable oil in the rubber and plastic structures leading from the air filter box to the throttle body. To wit:
I had hoped to address the issue with a catch can, but as I look at where the can is situated, it really doesn't look like it serves this purpose. Looking at the pictures of KenHorse's install (thanks, by the way), it looks like the can simply intercepts vapors going from the crankcase back into the intake manifold:
If that's the case, I don't think a catch can would help my problem. Do you agree?
Burning Brakes
Joined: Jan 2004
Posts: 1,158
Likes: 6
From: Winter Springs Fla
Gentlemen,
Forgive me for reviving an aging thread, but I am hoping to be educated on a catch can issue. I am one of those that has discovered considerable oil in the rubber and plastic structures leading from the air filter box to the throttle body. To wit:
If that's the case, I don't think a catch can would help my problem. Do you agree?
Forgive me for reviving an aging thread, but I am hoping to be educated on a catch can issue. I am one of those that has discovered considerable oil in the rubber and plastic structures leading from the air filter box to the throttle body. To wit:
If that's the case, I don't think a catch can would help my problem. Do you agree?
Those 2 lines will always spu oil into the filter/intake tract .
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
Except that they don't on this car. Ludi is correct that the oil in his intake is not from the PCV system but the line coming off the dry sump tank. A catch can will not prevent this, only proper oil level will.
Burning Brakes
Joined: Mar 2013
Posts: 896
Likes: 38
From: Camarillo California
Concerning proper oil level, I really hope that's all it was. But the jury is still out. I checked my oil level not long after break in and it looked fine. I didn't discover the oil in the intake system until several thousand miles later. While it's possible that it was overfilled at the factory and was done puking by the time I checked it, I'm also concerned as to the role that "aggressive driving" may have played, as described in this GM alert (Thanks Theta):
One curious thing about this document is that it talks about aggressive driving "pushing oil through the PCV system" and all the way into the air box. I'm at a loss as to what path this would take, but one would assume GM knows its engine. (I suppose that even the line from the dry sump tank to the air intake is still designed to control pollution and may be regarded as part of the "PCV system".)
Last edited by Magister Ludi; May 1, 2014 at 02:31 PM.
Supporting Vendor
Joined: Aug 2003
Posts: 3,641
Likes: 7
From: Beautiful CO
St. jude Donor '14
Heel & Toe
Joined: Feb 2014
Posts: 19
Likes: 0
From: Littleton Colorado
There is an oil problem
My dry sump system was dumping oil out of the ProCharger blow off valve after we supercharged it. I have a feeling after looking at the way things are done that all this oil was previously going into the intake. The BOV just gave us a low point for the oil to leak.
I would like to know if STOCK dry sump owners are seeing oil at the intake. The hose runs from the canister to the intake. Please take a look if you are so inclined and let us know if this is a design problem.
My opinion is that this is a design flaw.
-Jim
I would like to know if STOCK dry sump owners are seeing oil at the intake. The hose runs from the canister to the intake. Please take a look if you are so inclined and let us know if this is a design problem.
My opinion is that this is a design flaw.
-Jim