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2005-2006 LGT colored vacuum routing diagram


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http://legacygt.com/forums/attachment.php?attachmentid=88538&stc=1&d=1281363875

 

Feel free to speak up if I didn't color something right. Original credit goes to Subaru.

 

This is for the fuel and emissions systems. The boost control, crankcase breathers, and air bypass valve (BOV) are not covered in this diagram. Subaru doesn't seem to have supplied a "complete" vacuum routing diagram like a lot of other manufacturers do. You should see a 1993 Rx-7 vacuum routing diagram... 76 hoses.

 

Here is a colored diagram to show turbo system routing:

 

http://legacygt.com/forums/attachment.php?attachmentid=88558&stc=1&d=1281402455

 

Finally, here is a diagram of the crankcase ventilation. The diagram was left uncolored so as not to obscure the arrows which show how the air flows.

 

http://legacygt.com/forums/attachment.php?attachmentid=88559&stc=1&d=1281402455

 

Also, for an ECU pinout for 2005-2006 see this thread: http://legacygt.com/forums/showthread.php/click-here-2005-legacy-gt-ecu-pinout-126185.html?t=126185

05LGT_routing_3.thumb.jpg.78e9ffc7dd9d8727f162688660d57bcb.jpg

05LGT_turbo_routing.png.1b5b081e82e73494c6b76f6eca5b3d85.png

05LGT_PCV_routing.png.6a0863e69d485ae3249b57370e6cf3d5.png

Edited by Boostin
On the search for a new DD...
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good to have these pics at hand; just one caveat leaps out at me: there's only pressurized fuel in quite a few of the lines in pic 1, the thread title might mislead a greenhorn otherwise -- never can be too careful dealing with that stuff ;)
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This absolutely pales in comparison to the vacuum diagram for my 1983 Mazda Rx-7. I stripped the carb and engine of all emissions controls and it stall has more vacuum lines than our Legacies. Thank god for modern cars!
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This absolutely pales in comparison to the vacuum diagram for my 1983 Mazda Rx-7. I stripped the carb and engine of all emissions controls and it stall has more vacuum lines than our Legacies. Thank god for modern cars!

 

Ha! You've never worked on a 3rd gen have you.

 

http://legacygt.com/forums/attachment.php?attachmentid=88679&stc=1&d=1281664981

 

3000GT Vr-4 (twin turbo) are also nightmares, especially with the twin intercoolers and associated piping:

 

http://legacygt.com/forums/attachment.php?attachmentid=88680&stc=1&d=1281665245

 

 

I agree that an LGT is a walk in the park compared to some vehicles though. The drive-by-wire helps simplify the idle controls.

vacuum_hose_diagram2.thumb.jpg.010eb800c96bbe7cac9c1c85424e647e.jpg

VR4_vacuum_routing.thumb.jpg.5eeabbd49bec8708c358793eccac57e4.jpg

On the search for a new DD...
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  • 2 weeks later...
  • 3 weeks later...
The T fitting that the 05's have in the vaccum lines. I hear its one of the most important things to in the vaccum lines.

 

I think I was just looking at that the other day when the car was apart for a clutch. Maybe it's colored green in the first diagram? The 3-way joint near the purge valve?

Edited by Boostin
On the search for a new DD...
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  • 3 years later...
  • 5 months later...
Is there one of these diagrams for the 2007 version anywhere? I know the 07 cars don't have the blue tee, so my real question is where does the vacuum line go to?

2013 S4 - Glacier White - DSG - B&O - Tech Package - Sports Diff - Napa - RS4 Grille - Stasis Exhaust - APR Intake - KW Variant 1 - Stern Control Arms - CR-15 - Stasis RSB - Moog Endlinks - PC Hyper Black Peelers - Deval Front Lip - ECS Rear Diffuser - Carbon Imports Ducktail - ECS Mirror Caps - Relak Paddle Extensions - Autostyle Floor Mats - LED Interior - V1 - Blackvue DR900s -

 

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Thanks MC! I'd actually figured it out anyways. One vacuum leak fixed. Not sure if my stalling issue is vacuum related or not. Car's going to Infamous today to get checked out...

2013 S4 - Glacier White - DSG - B&O - Tech Package - Sports Diff - Napa - RS4 Grille - Stasis Exhaust - APR Intake - KW Variant 1 - Stern Control Arms - CR-15 - Stasis RSB - Moog Endlinks - PC Hyper Black Peelers - Deval Front Lip - ECS Rear Diffuser - Carbon Imports Ducktail - ECS Mirror Caps - Relak Paddle Extensions - Autostyle Floor Mats - LED Interior - V1 - Blackvue DR900s -

 

[sIGPIC][/sIGPIC]

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  • 7 months later...

Turbo inlet, or throttle body inlet?

Throttle body inlet is easy, yank the intercooler off and it's right there.

Turbo inlet has a lot more plumbing attached to it, and is easy to rip, and takes removing quite a bit more....

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Turbo inlet, or throttle body inlet?

Throttle body inlet is easy, yank the intercooler off and it's right there.

Turbo inlet has a lot more plumbing attached to it, and is easy to rip, and takes removing quite a bit more....

 

The intake manifold - big black one - number 3 in the diagram...

 

http://legacygt.com/forums/attachment.php?attachmentid=88538&stc=1&d=1281363875

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  • 2 months later...
  • 1 year later...
which one is wrapped in a gray foam? where does it go?

I donated to LegacyGT.com which allows me to have this nifty signature. :p

 

 

If anything SCASEYS posts ever becomes a sticky i'm gonna light this whole place on fire :lol:
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  • 2 weeks later...

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