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 Post subject: DIY - Blow Off Valve replacement
PostPosted: Mon Nov 27, 2017 3:04 pm 
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Vehicle: MY09 XT Premium

Posts: 111
Location: Shoalhaven NSW
So you want to replace the OEM blow off valve (BOV) to get more ptshhh or just because you want to mod your car for poops and giggles.
This guide on swapping out your BOV will show you how it's done. Should only take 10 mins to complete and any mechanical skill level can proficiently do it.

What you'll need
  • 10mm 1/4inch drive long socket
  • Flat-head Screwdriver
  • Pliers
  • Blow Off Valve (this guide is for a SH9 Forester XT using a T9001 GFB Respons)

What you need to do
Step 1
Remove Engine Cover by popping out the plug clips using the Flat-head Screwdriver.

Step 2
Locate the BOV

Step 3
Remove vacuum hose and the plumback hose by squeezing the clamp tabs and wiggle the hose off the BOV (a flathead screw clamp was on this car).
Using the 10mm Socket and driver, undo the 2 bolts holding in the OEM BOV to the intercooler.

Step 4
This step may not be needed depending on your selected BOV.
The GFB Respons is an adjustable BOV, allowing you to adjust the amount of air is recirculated (plumb back) and how much is vented to atmosphere.
- note: venting to atmosphere can throw the AFM ratios out a little and cause mild backfire, oh and may also be illegal in your state/territory.
Picture shows the slight opening that was selected for this install.

Step 5
Install new BOV to intercooler by bolting it back in (keep the BOV trumpet off until after bolting BOV in) and re-attaching the hoses.

Step 6
Clip back in engine cover and look at the BOV hidden from view.

There you go, a 10 minute mod and easy enough for anyone to follow.
Hope this helps someone, even if it is a basic, straight forward thing to do.

 Post subject: Re: DIY - Blow Off Valve replacement
PostPosted: Mon Nov 27, 2017 5:23 pm 
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Vehicle: MY08 XT (SH)

Posts: 1477
Location: Brisbane
Good write-up.

No such thing as a "job too simple" DIY write-up in my opinion. We all have to start somewhere with DIY car modding.

My build thread: viewtopic.php?f=12&t=54775

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