Up Pipe O2 sensor? - Subaru WRX Forum
 
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post #1 of 5 Old 12-01-2011, 05:13 PM Thread Starter
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Up Pipe O2 sensor?

First of all Hi to everyone!!!

I picked up a high mileage bugeye last week that has issues. I pulled the engine to swap the clutch which the previous owner was nice enough to throw in. Grip clutch + lightened flywheel.

Taking off the exhaust was a bear as all the bolts below the engine had frozen and stripped, so I pretty much chopped the shielding off to get at the bolts. Turbo cover was more of the same.

I happen to have a v4 sti exhaust / up-pipe that I wand to use in place of the wrx one. I can do the 2.2K resistor mod for the egt sensor, but do I have to put the O2 sensor back in the up pipe (weld in a bung), or can it get relocated / modded?

this motor was the first one that I've seen where the timing belt tensioner was shot. I don't know how I got the car home without skipping teeth, I could move the belt about 3/4 inch with my fingers! I swapped out the belt and tensioner and now the timing is back to dead on, but I have to figure out the up-pipe situation.

Lol and the cat-back exhaust is a piece of 3" stainless running all the way back, sure sounds pretty

Thanks for listening and let me know if you have any suggestions!

Dex
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post #2 of 5 Old 12-01-2011, 07:08 PM
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O2 should be in the manifold and the downpipe right before the cats. Are you talking about the EGT probe?

Resident Grumpy Old Man(Keith)
03 SRP 2.34L
08' LGT Gears...
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post #3 of 5 Old 12-01-2011, 07:26 PM Thread Starter
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nope, the O2 sensor in the manifold, sorry I said it wrong, looks like I'll have to make a mount for the o2 sensor because the v4 sti has the first o2 sensor in the down pipe. I might just use the sti up pipe with the wrx manifold...
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post #4 of 5 Old 01-09-2012, 08:35 AM Thread Starter
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I ended up using a v4 Uppipe with the rest of the WRX manifold. I did the 2.2K resistor in the EGT plugin and it worked fine.

Got the engine back in with new clutch and it started up great.

But now I have a turbo coolant leak!!! I hope its just a bad hose clamp under the turbo, but I'm going to have to get a closer look to see exactly where the leak is.
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post #5 of 5 Old 01-09-2012, 03:40 PM
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Mine seem to always be the crush washers. I never can seem to get them at just the right tightness... Glad to hear this worked out for you though. What type of EM are you running?

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03 SRP 2.34L
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