OIL CATCH CAN/ PCV VALVE DELETE

2014 CADILLAC XTS

157,000 MILES • 3.6L • V6 • 2WD • AUTOMATIC

JORDANCASTILLO80

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SO I BEEN HAVING A COUPLE OF PEOPLE TELL ME OF AN OIL CATCH CAN FOR MY V6 3.6 VVT DIRECT INJECTION ENGINE.

I UNDERSTAND FOR THE MOST PART THE PURPOSE TO REDUCE THE BLOW BY OF CRANCK CASE AND SLUDGE TO YOUR VALVES TROUGH THE INTAKE VALVE.

NOW AS FAR AS DOING THE ACTUAL SET UP IS THERE ANY SUGGESTIONS ON HOW TO SET UP ONE, FOR EXAMPLE WICH LINES TO DELETE OR WHAT LINES TO RE ROUTE? MAYBE WITH A DIAGRAM ? THANKS IN ADVANCE ?

Sep 21, 2025 at 12:08 PM

STEVE W.

CERTIFIED EXPERT
15,113 POSTS

You don't delete the PCV, you just install the catch can in the PCV line. That way the PCV still operates to control the airflow through the engine. Yes they can help with build up on the valves, however with the mileage you list you might want to get the valves cleaned then see how much actual blowby you have. If they have never been done and the engine isn't using oil, you likely don't need one. Normally you only install them on known oil burners just to keep from building up carbon and to keep the converters alive.
As to how to set one up, you mount it with the top up, then run the in and out lines to go between the valve and intake manifold. In goes toward the PCV valve, out goes to the intake manifold.

Sep 21, 2025 at 11:30 PM