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      06-17-2020, 01:40 AM   #1
Sophisticated Redneck
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Drives: 2012 BMW X5 50i
Join Date: Jul 2018
Location: CA

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Installing Catch Cans on N63 & S63 Engines

Below is a write-up on installing catch-cans & eliminating most of the CCV tubing that is prone to failure. There are several advantages to this setup as it not only will capture much of the oil that bypasses the stock air/oil separators greatly reducing carbon buildup on the intake valves and ports, but also increases the crankcase vacuum under idle and part-throttle conditions, helping with piston oil ring control and reducing oil leaking past the valve guides. I have over 30,000 miles on this setup so far and it is incredible how much oil it captures that otherwise would have been injected back into the intake stream to become carbon deposits (plus oil in the intake decreases octane)

Please note you will not be able to use the stock engine cover anymore (you shouldn't have that piece of heat trapping crap on anyway) and you need to bend the stock metal frame that attaches the air filters as you can see in the pictures below to make room for the connections so do not proceed unless you are ok with this.

The parts list is as follow for setting up with -AN connections and braided line, it can also be done much cheaper with just regular fuel line and hose clamps.

Vacuum control valves are used in this setup that serves two purposes: Controlling the amount of crankcase vacuum (they are adjustable) and serving as a one-way check valve for boost pressure. This allows complete elimination of the original cheap stock plastic CCV tubing check valves are prone to failure.

(2) Catch Cans: https://www.amazon.com/gp/product/B07F12W7BX

(2) Vacuum control valves: https://www.amazon.com/gp/product/B0081TJQ52

(1) 8AN braided line kit: https://www.amazon.com/gp/product/B077GSGDC5

(1) 6AN braided line kit: https://www.amazon.com/gp/product/B07CZWDLLN

(8) 8AN to 3/8"NPT adapters: https://www.amazon.com/gp/product/B07DQQJQ38

(2) 6AN to 1/8"NPT adapters: https://www.amazon.com/gp/product/B06XRZD92P
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Last edited by Sophisticated Redneck; 06-17-2020 at 03:23 AM..
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