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96 Legacy Outback 2.5
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47 Posts
Discussion Starter · #1 ·
I am aware that this will be another loaded question, but I have a 96 outback 2.5 auto and i have no idea when the plugs were last changed as i just purchased the vehicle, its got about 174000 miles on it and if they havent been changed it is past time to do it
 

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01 Outback H6 VDC, 97 GT wgn w/ ej22, 98 OBW w/ej22
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1,401 Posts
you want NGK plugs. i don't know the specific number off hand but they cost about $8 at the parts store.

the $2 plugs will work just fine but the $8 plugs last a lot longer.
they can be challenging to remove, especially #4.

do you have an owners manual.?
 

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2014 OBW 3.6R Limited, 1997 OBW 2.5L Auto (sold, but not forgotten), and 1991 Ford F150
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1,525 Posts
Yeah ... what they said - NGK.

I ran the $2-3 plugs in mine for awhile, then switched to the $10 ones ... did not notice any difference in performance, but they are just enough of a PITA to change out that I think the $10 ones are worth it. 60k miles vs 30k miles.
 

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96 Legacy Outback 2.5
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47 Posts
Discussion Starter · #6 ·
and surprisingly enough the owners manuals were in the glove box when i bought the car
 

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2006 Outback Wagon 2.5i 5spd MT Atlantic Blue Pearl
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261 Posts
NGK Platinum is OEM, but I paid the extra dollar per plug for the Iridiums. I don't remember the number off the top of my head...you can find it at Napa, Pep Boys, Rock Auto, etc.

RobLog is spot on: changing the spark plugs are a pain. Took me a few hours the first time, but I could probably do it in about 45 minutes now. It's still one of those things that if you're going to do it, go all out....you're not going to want to do this very often lol. On my 06 2.5i, I found it helpful to remove the battery and the giant hose going out from the air filter housing (which I also removed). The front two plugs weren't too bad (tight, but doable), but the back ones sucked. I later figured out that I had to drop the socket down, follow it up with a wobble joint, then I could follow it up with my socket driver. If you need new wires, a new battery, or a new air filter, this is the time to do it. I was in need of new wires/air filter/battery, and I had to put them all back in anyways...figured it was best to put new ones back in.
 

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96 Legacy Outback 2.5
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47 Posts
Discussion Starter · #8 ·
i have access to a lift and when i was under the car the last time i had clear access to all four plugs from below so i think thats the way i am gonna do it, fyi the iridium number is bkr5eix-11 or 5464 depending on how your part store stock their stuff
 

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08 Outback Touring Blue/Grey w:Alpine stereo,corrosion management,front/rear swaybars/endlinks(Whiteline), King Springs, KYB struts,LWT crank pulley,K&N air filter
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294 Posts
Plus one for NGK iridium plugs. They seem to last longer.
 

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2006 Outback Wagon 2.5i 5spd MT Atlantic Blue Pearl
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261 Posts
So you're going to cheat but putting on a lift. Lol jk...I've heard it's much easier that way. Glad you have access to a lift.

Yup...sounds like the part number. Have fun!
 

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(formerly) 03 H6 OBW , (presently) 06 WRX Sportwagon & 2021 Honda CR-V
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18,595 Posts
if you decide to check the gaps on your new plugs, do so EXTREMELY carefully. I've read it is easy to knock off the tiny bit of plat. or iridium. Supposedly the NGKs are factory set and ready to install. If you 'experiment' with different heat ranges or a different brand - dunno what the gap might be.
 

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2006 Outback Wagon 2.5i 5spd MT Atlantic Blue Pearl
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261 Posts
Different brand? There's something other than NGK? ;-)
 

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96 Legacy Outback 2.5
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47 Posts
Discussion Starter · #13 ·
i would never even think of checking the gap on a platinum or iridium plug, and as far as i know all platinum and iridium plugs are factory set(they are actually within range, not exact)
 

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(formerly) 03 H6 OBW , (presently) 06 WRX Sportwagon & 2021 Honda CR-V
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18,595 Posts
i would never even think of checking the gap on a platinum or iridium plug, and as far as i know all platinum and iridium plugs are factory set(they are actually within range, not exact)
eh..... some of us old timers recall when you always had to check/set the gap. I even used to pull used plugs and file the electrodes flat again, reform and reset the gap and reinstall them.
 

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96 Legacy Outback 2.5
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47 Posts
Discussion Starter · #15 ·
this is possibly one of the first cars that i own that does not require setting gap and such
 

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2009 Outback Wagon, 2.5L, Special Edition, 4EAT
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187 Posts
I plan on changing the plugs in my '09 OB. The local Autozone has the Iridium for $5.90 each. I also read somewhere that it makes it easier if after pulling the plug boot, insert the spark plug socket, a 6" extension followed by a 3" extension, and then the ratchet handle.

The Iridium plugs are factory set but I always double-check; gap should be 0.044 in.

Does anyone know the torque setting? I thought I read 12lb-ft but I can't find the reference again.
 

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00 OB 07 OBXT
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5,536 Posts
$3 NGK V or G power plugs for me, change them every 30k and, they always look like they can go another 30k when I pull them.

This isn't really relevant but, I was trying to look up the ridiculously expensive plugs that were spec'd when I put a supercharger on my truck 70k ago, I ran across a Kenne Bell article that showed in their extensive testing, the standard NGK copper plugs faired better in long term testing than the double platinums that cost 4x as much ... they now recommend standard plugs for the applications. Like I said, not super relevant but, though the "super plug" manufacturers love to sell exotic metal plugs, the real world testing doesn't always reflect their claims. It's "unobtainium" it must be better ;]

BTW, make sure you put anti seize on the threads of those plugs you're going to leave in there for 100k .
 
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