Friday, July 17, 2009

DIY: How to Replace Subaru Forester Spark Plugs

It has been 30K [km] and almost a year since my last spark plug change (That was first for me). So, today i bought four NGK Spark Plugs from one of (Official Service) Subaru Dealers in Ankara and replaced them.

For now this post is copied as is from Wikimechanist.
The upcoming posts that can be named as "mechanic" will be posted only to Wikimechanist.

1 - Remove air filter elements going to the air filter to get free space:

2 - Remove Spark plug cables:

3 - Remove Spark plugs with suitable socket. That is 16 mm.
Also you'll need torque wrench to tighten with proper torque. If you have not one. Turn spark plugs 1/2 to 1/4 turn after contact occurs.

The previous change was 30K [km] before. You can see the old and the new spark plugs. The clean one is new of course. It must have 1 - 1.1 mm gap. If not adjust it.

For the driver side plugs, you need to remove window washer water container.
But not fully removal is needed. You may fix it with some elastic holders after turning it a little. You may have enough space to handle replacement of spark plugs.

Update (02.01.2010) some pictures for driver side plug removal:

Good luck.
It is pretty easy. Just half an hour for me.

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At 6:31 PM , Blogger Pete said...

This comment has been removed by a blog administrator.

At 10:31 PM , Blogger Wikimechanist said...

washer pumps (2 small electric motors) are connected to the washer container so it is hard to fully remove since motor cables are very short. However, if you remove two screws of washer, that can clearly seen at the last picture of the procedure, you should rotate the washer towards the front side of the car. If you fix washer at that position you should have some space to reach spark plugs. As far as i remember i have a low resolution picture that i took with my cell phone for that. I will try to find it and post here.
Good luck.

At 5:48 AM , Blogger Pete said...

No problem Fatih, I was able to remove the washer bolts as you suggested, move the unit to the side and replace the two spark plugs. Now my "Check Engine" light will go off I hope!

I just noticed you do C code also. I may ask you for help on that too.

At 10:10 PM , Blogger Wikimechanist said...

My pleasure and thanks Pete.
I have examined my forester's CEL code last year. It was bad knock sensor.
Hope yours is gone.

At 4:44 AM , Blogger Unknown said...

Pull the wheels and go from the bottom so much easier

At 5:23 AM , Blogger Kieri Ogden said...

Torque specs

At 9:50 AM , Blogger Wikimechanist said...

Ezy way: turn by hand, feel the crush washer collapse and turn extra 1/8 turn.


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