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#1: 02-23-2013, 10:05 AM
5th Gen LGT - Performance Mods
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The purpose of this thread is to consolidate all technical posts related to the 5th Gen LGT - Performance Modifications.

Please help us maintain the stated purpose of this thread.

To start off, I wanted to post a topic of recent interest within the 5th Gen community.

Crawford Air/Oil Separator (Installation Reference)

Since a model specific AOS kit was not available from Crawford, for the 5th Gen LGT back in April 2012 when I did this install, I am offering up this information as an example of how I installed the Crawford AOS on my LGT. Hope you find it a useful reference. Duplicate at your own risk.

First off:
Is this something you will be doing yourself?
Where do you plan to mount the AOS?
If you haven't already studied up on the installation instructions from the Crawford site, it would be good to check out some of the various model instructions, to become familiar with how they are installed. This will help you understand some of the photo's of my 5th Gen LGT installation.

If you are going to try to replicate my install, I wouldn't recommend the Universal Kit, (even though Crawford may suggest that to you) I didn't like the mounts ... very generic looking. Of course, your choice though.

I used the AOS model: Air / Oil Separator V2 - 05-09 LGT OEM Turbo Location Kit, and also ordered the extension adapter mounting plate directly from Crawford. The only things I used out of the kit were the AOS and the "Y" adapter fitting for the crankcase vent & drain connections. Although some of the pre-cut hoses in the kit may fit the 5th Gen install, I decided to source all the hose, clamps and everything else needed to complete my installation.

The following photo's are not necessarily in the actual installation order, since at the time, I hadn't thought of posting up a installation thread.

Nevertheless, I hope it will be helpful to those going down a similar path.

REVISION: 04/05/13

I have decided to modify the water jacket source supply/return lines on my AOS installation. After reviewing the fitment of the new charge pipe being developed by RacerX, and the actual function of the water jacket thru the AOS, I decided to make the change.

Added benefits:
(1) Maintain normal (OEM) water jacket coolant flow path thru the turbocharger.
(2) Free up additional space for charge pipe replacement.
(3) Provide adequate heated circulating flow thru AOS from a less critical water jacket path.
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Last edited by BigBopper; 04-18-2013 at 12:03 PM..
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