2010 CTS 3.6 engine oil air vapor catch can install
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2008-2013 Cadillac CTS Performance Mods Discussion, 2010 CTS 3.6 engine oil air vapor catch can install in Cadillac CTS Second Generation Forum - 2008-2013; Just purchased a 2010 CTS Sportwagon AWD Premium with 8000 miles from an elderly lady that found the car too ...
  1. #1
    MBambo is offline Cadillac Owners Member
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    2010 CTS 3.6 engine oil air vapor catch can install

    Just purchased a 2010 CTS Sportwagon AWD Premium with 8000 miles from an elderly lady that found the car too confusing. After viewing all the negative comments related to valve coking of direct injection engines, I decided to install an oil vapor catch can to prevent that issue. Trying to research the best catch can placement in the tight engine compartment and where to tap the PCV valve flow was lacking in references. As a result, I decided to offer my instal info here to help others with the same intent. I placed the catch can on a bolt available on the passenger side of the radiator. An alternate location was a cavity to the right rear of the engine. There are several PCV hoses on the 3.6, but the proper one to run the hose from the catch can is a tube FROM the PCV to the intake sleeve that runs under the noise baffle cover above the left side of the engine. It is a rubber shielded plastic tube that will have to be cut in two places to attach the "in" & out" small inside diameter hoses. For the 2010 engine, with my catch can placement, you will need about 7 feet of hose to cover the to and from routing. Several companies offer catch cans of different widths and lengths. Be careful and measure the available mounting space before ordering, as my radiator position choice space is limited. No problem with baffle cover interference or hood closing. Install, once location decision was made, was one hour. Since this website won't accept my attachments, here is a site to refer to pictures of my install: http://s34.photobucket.com/user/GBam...?sort=9&page=1
    Attached Images

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    SC2150's Avatar
    SC2150 is offline Cadillac Owners Connoisseur
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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Plenty of room to fit on the passenger side engine front.

    Lots of junk cans out there, only a few good ones worth using.

    We are weeks plus backlogged, but no can equals the function in stopping it all.


    www.RevXtreme.com
    RX Performance Products/RevXtreme.com 941-721-1826

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Quote Originally Posted by MBambo View Post
    the proper one to run the hose from the catch can is a tube FROM the PCV to the intake sleeve that runs under the noise baffle cover above the left side of the engine.
    You have placed the Catch Can in the "Clean Air Tube". It is my understanding the Catch Can needs to be in the "Dirty Air Tube".

    I agree with you that none of the post have done this MOD justice.

    SC2150, anyone, jump in here and correct me if I'm wrong.


    EDIT: GM has produced thousands of these engines over many years. Has anyone ever stopped to ask why, if this is such a problem, they have never put in a catch can? Or maybe we are just smarter then the GM engine engineers.

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    You are correct.

    Great diagrams and explanation.




    OP, can you take a pic and post of the insides of that can?

    Thx!
    RX Performance Products/RevXtreme.com 941-721-1826

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Quote Originally Posted by SC2150 View Post
    Great diagrams
    Diagrams are from the 2008 CTS Service Manuals, the photo I took from the OP.

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Update on my $4.50 + brass connections, Paint Gun Water Air Separator. Still removing oil. Filter looks to be in good shape. Small, no mounting needed (tie wrap). Guess I will change it after 6 months.


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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    That's an air compressor water separator....add another inline after it and see it fill with oil as well.

    They let more through than they can catch when used on an engine, but work pretty well on an air compressor. Far better than nothing though as you are catching some of the oil.

    RX Performance Products/RevXtreme.com 941-721-1826

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Quote Originally Posted by SC2150 View Post
    That's an air compressor water separator....add another inline after it and see it fill with oil as well.

    They let more through than they can catch when used on an engine, but work pretty well on an air compressor. Far better than nothing though as you are catching some of the oil.
    That would be a cool test but I noticed there is some flow restriction and adding another may limit air flow. Have you tried this same test with yours? What was the result? Maybe you should put one of these behind yours and see what you get. They're cheep.

    EDIT: I'm in no way recommending this as a solution (yet). Just an experiment.

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    OP, were you able to move your catch can to the correct line? Looks like it would be doable without moving the can however there is a ton of room near the passenger side firewall.

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Mistercoffee,
    No, to date I haven't made the change. I am getting conflicting or confusing info from a Cadillac mechanic on which is the "clean" and which is the "dirty" hose line. As soon as I get that clarified, I'll post my finding and possibly have to make a install correction.

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Quote Originally Posted by MBambo View Post
    Mistercoffee,
    No, to date I haven't made the change. I am getting conflicting or confusing info from a Cadillac mechanic on which is the "clean" and which is the "dirty" hose line. As soon as I get that clarified, I'll post my finding and possibly have to make a install correction.
    Cool, I'm sure it won't hurt anything where it is so no rush. When I was looking for info to install one I found little help here.

    Looks like a nice can, who made it?

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Quote Originally Posted by Mistercoffee2 View Post
    Cool, I'm sure it won't hurt anything where it is so no rush. When I was looking for info to install one I found little help here.

    Looks like a nice can, who made it?
    I received a sketch/illustration from the Cadillac technician that confirmed that you were correct and I had made the wrong connection. I had tapped into the "clean" hose instead of the "dirty". His illustration indicated that I should have tapped into the "dirty" line that starts at the top of the aluminum manifold. Illustration:

    http://s34.photobucket.com/user/GBam...tml?sort=9&o=4

    I'll just repair the gap that I made in the clean hose and correctly route the hoses as illustrated. I don't see any reason to change the position of the catch can. the catch can is:



    ADD W1 Universal Aluminum Oil Catch Tank Can Reservoir Tank Polish
    $59.99

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Quote Originally Posted by MBambo View Post
    I received a sketch/illustration from the Cadillac technician that confirmed that you were correct and I had made the wrong connection. I had tapped into the "clean" hose instead of the "dirty". His illustration indicated that I should have tapped into the "dirty" line that starts at the top of the aluminum manifold. Illustration:

    http://s34.photobucket.com/user/GBam...tml?sort=9&o=4

    I'll just repair the gap that I made in the clean hose and correctly route the hoses as illustrated. I don't see any reason to change the position of the catch can. the catch can is:



    ADD W1 Universal Aluminum Oil Catch Tank Can Reservoir Tank Polish
    $59.99
    I would not cut the OEM tube at all. Just remove it and connect your hose in it's place.

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    MBambo is offline Cadillac Owners Member
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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Quote Originally Posted by Mistercoffee2 View Post
    I would not cut the OEM tube at all. Just remove it and connect your hose in it's place.
    I don't know if you have made this modification but trying to remove the tube in the confines at the rear of the engine is a bear. The rear composite shield and body brace are also in the way. I couldn't figure out how to remove the shield without removing the body brace, as I couldn't slip it over or under the brace. My hands wouldn't fit and I couldn't get the tube to budge. Also, I couldn't figure out how to remove the tube from the top of the manifold. I ended up cutting the tube and completed the installation.

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    Re: 2010 CTS 3.6 engine oil air vapor catch can install

    Quote Originally Posted by MBambo View Post
    I don't know if you have made this modification but trying to remove the tube in the confines at the rear of the engine is a bear. The rear composite shield and body brace are also in the way. I couldn't figure out how to remove the shield without removing the body brace, as I couldn't slip it over or under the brace. My hands wouldn't fit and I couldn't get the tube to budge. Also, I couldn't figure out how to remove the tube from the top of the manifold. I ended up cutting the tube and completed the installation.
    Yes I have done it (see post #6 below) and I removed the tube but cutting it works also.

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