Last post on Jan 24, 2010 at 6:46 PM
You are in the Subaru Legacy & Outback
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Subaru Legacy, Subaru Outback, Engine, Wagon
#1 of 11 Subaru outback llbean 3.0 engine=spark plug replacement
Jan 07, 2009 (4:32 pm)
how do you replace the spark plugs on the 3.0 engine with limited fire wall clearance. Special tool?, sawsall?, jack engine?, lower drive train?. Another $400dealer service issue?Help please.
#2 of 11 Re: Subaru outback llbean 3.0 engine=spark plug replacement [cdk15]
Jan 09, 2009 (11:27 am)
Have you tried yet? It really should not be that hard.
IIRC the 3.0l H6's stroke is actually shorter than the 2.5l's H4 stroke. So there may actually be more room.
Plus - I was able to change the plus myself on a 2.5l Forester. That means I had enough room with a wider engine in a more narrow engine bay.
Your spark plugs should be a *lot* easier than that, and I managed.
A low-profile ratchet might help, and I used two 2" ratchet extensions. You may not even need that many tools.
#3 of 11 Re: Subaru outback llbean 3.0 engine=spark plug replacement [ateixeira]
Jan 09, 2009 (5:02 pm)
To do the plugs on my Outback's 2.5L, I would attach the following in this order: plug socket, u-joint, short (2 or 3"?) extension, long (6") extension, ratchet. I also removed the air cleaner on the passenger side and the battery/washer fluid on the driver side. It was not too difficult, but getting them (plugs) back in was a pain.
#4 of 11 Re: Subaru outback llbean 3.0 engine=spark plug replacement [xwesx]
Jan 09, 2009 (6:21 pm)
sorry not the same
#5 of 11 Re: Subaru outback llbean 3.0 engine=spark plug replacement [cdk15]
Jan 09, 2009 (6:57 pm)
Yeah, I know, but I figured I would throw out the info as I am not sure how drastically the 3.0 differs in terms of clearance, etc. All I know is that it adds two extra cylinders and has the same frame with which to contend.....
#6 of 11 Re: Subaru outback llbean 3.0 engine=spark plug replacement [xwesx]
Jan 12, 2009 (10:56 am)
My wife's previous car, a 2002 Legacy L, was exactly the same.
I did the plugs twice, and it was no big deal.
It was harder on the 98 Forester, with a more narrow engine bay, but I still managed to do that myself, also twice.
#7 of 11 2004 Legacy spark plugs
Jan 21, 2010 (12:13 pm)
I tried to replace all 4 plugs one Sunday afternoon. After unhooking the entire air intake system and pulling on the boots- like the plugs were attached with expoxy, I finally gotthe right side in. I looked at the left- and gave up until I had more time. What is the secret on the drivers side? There is no room! Do I need to remove both the washer reservoir and the battery to get at the front? Then what do I do about the back? I just hope this side the wires are not "glued" on!
Any help is greatly appreciated!
#8 of 11 Re: 2004 Legacy spark plugs [bjonell]
Jan 21, 2010 (1:49 pm)
If you have ramps or jack stands try accessing them from underneath.
#9 of 11 Re: 2004 Legacy spark plugs [bjonell]
Jan 21, 2010 (2:16 pm)
I am not sure how that generation is arranged as compared to the prior one, but that is exactly what I did - remove the battery and reservoir.
The first time I replaced them, the boots were a royal PITA. I ended up tearing one before it finally let loose. After that, I just planned on replacing the wires along with the plugs, though they were easier to remove on subsequent tries.
#10 of 11 Re: 2004 Legacy spark plugs [xwesx]
Jan 21, 2010 (2:25 pm)
Apply some di-electric grease before you reinstall them.