spark plug change-out

[Ryan]

Does anybody have pictures or links to a site that shows how to change out
the spark plugs on a 97 legacy. It appears to be a major job, is this so??

cheers

Ryan

 

[David Spektor]

I am changing spark plugs on 97 Legacy without even removing Windshield
washer fluid tank or air intake box. All you need is swivel adaptor and
extension bar for spark plug socket.
Changing spark plugs on WRX - that a challenge! Took me almost 4 hours to
upgrade stock plugs to irridium.

 

[Kelvin]

David,
Can you give me a rough idea of what is involved to change the plugs on the
WRX (mine is a 2002) ?
Does the engine need to be lifted ?
Thanks,
Kelvin

 

[EugeneT]

I changed the plugs on my 97 Legacy some time ago. It's much easier if
you put your car up on ramps and go at it from the bottom. That way
you don't have to remove any cables/washer fluid etc..
It's not that hard. For me, the worst part was trying to get the
boots off the plugs. Once you do that, get a socket wrench with a 5
inch adapter and it's all about getting the angle right to catch the
plug and unscrew it. You'll have a few inches of clearance between
the engine block and the other accessories wich is just enough.. you
might need to insert the extension into the plug hole first and then
attach it to the socket wrench. It took me about an hour to do the
first plug and after i go the hang of it, i did the other 3 in 45
mins.

Good luck.

 

[David Spektor]

On WRX you must remove air intake and filter box (passenger side) and washer
fluid tank (on the driver side). Be careful not to brake plastic latches on
connectors (Air mass sensor and two washer pumps) - plastic looses all
flexibility when its cold.
Now you have to remove spark plug coils held by 40mm M8x1.25 shoulder bolt
with 12 mm hex head. I dropped one and could not find. Luckily had good
assortment of metric hardware to find substitution. Later found replacement
in "Help" section of autostore. Suggest to have couple of those handy or
this 99 c piece may cost you a lot of aggravation.
Space to work is very tight. Ratcheting 12 mm box wrench or Screwinder
Ratchet will make it much easier.
To remove plugs you will need 5" extension bar added to plug socket and use
ratchet straight up - no room for swivel adaptor. Stock plugs did require
some force at the beginning. Do not forget anti-seize compound to avoid this
in the future!
New plugs went in relatively smooth, but coils were not very negotiable. I
did not disconnect coil connectors(less risk to brake a retaining tab) and
because of the long spark plug collar (sleeve) it took some wiggling to get
coil on the right spot. And infamous 40 mm M8x1.25 shoulder bolt resisted to
catch on a thread for a while.
After that just put back all removed parts in reverse order and you good to
go!
Happy motoring!!!!!

 

[Ken Gilbert]

did not disconnect coil connectors(less risk to brake a retaining tab) and
because of the long spark plug collar (sleeve) it took some wiggling to get
coil on the right spot. And infamous 40 mm M8x1.25 shoulder bolt resisted to

this is a very good tip... some folks reporting the tab breaking off.
if you can do it without disconnecting, don't disconnect.

jm2c
ken