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Old 10-02-2005, 10:14 AM   #1
bc3tech
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Default Change spark plugs?

So I open up the hood of my Ion to put in my new NGK's and I can't for the life of me figure out what I have to do to get the spark plugs out - anybody help me out here? I realize we have a coil-on-plug setup, and have never worked w/ one. Thanks!

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Old 10-02-2005, 01:55 PM   #2
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Default Re: Change spark plugs?

The black piece that says "Ecotec" on it has a few bolts around the edge. Those need to be undone, and the cassette pulls up with the plug boots under it. The plugs are deep in the head of the engine from there.
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Old 10-02-2005, 02:17 PM   #3
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Default Re: Change spark plugs?

Keep in mind that you don't need to change the plugs until 100,000 miles.
Only change the plugs on a COLD engine and torque them in--don't guess.

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Old 10-03-2005, 07:36 AM   #4
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Default Re: Change spark plugs?

Quote:
Originally Posted by OhioVueBoy
The black piece that says "Ecotec" on it has a few bolts around the edge. Those need to be undone, and the cassette pulls up with the plug boots under it. The plugs are deep in the head of the engine from there.
Thanks man!
Quote:
Originally Posted by ssicarman
Keep in mind that you don't need to change the plugs until 100,000 miles.
Only change the plugs on a COLD engine and torque them in--don't guess.
I'm getting some NGK's so I'm replacing them for performance reasons right now - hopefully I'll see at least some improvement. Thanks for the advice about torquing them in - good thing I got myself a torque wrench not too long ago!

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Old 10-03-2005, 09:50 AM   #5
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Default Re: Change spark plugs?

put a little bit of anti seize compound on the threads of the plugs, noy too much or you may over torque when installing, that way they do not seize in the head. When taking them out cold do so slowly so as not to damage the threads. But really stock plugs are great for their service life, no need to change early.

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Old 10-03-2005, 10:45 AM   #6
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Default Re: Change spark plugs?

Quote:
Originally Posted by bc3tech
Thanks man!
I'm getting some NGK's so I'm replacing them for performance reasons right now - hopefully I'll see at least some improvement.
Don't hold your breath. Just like "upgrading" spark plug wires (on other cars), you will notice no difference unless your plugs are severely worn or one is faulty (you'd notice missing/stumbling).

The stock plugs are platinum tipped....good for ~100k miles. I just checked mine @ 32k miles & they were only worn .001"

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Old 10-03-2005, 07:49 PM   #7
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Default Re: Change spark plugs?

Quote:
Originally Posted by vintagegz
put a little bit of anti seize compound on the threads of the plugs, noy too much or you may over torque when installing, that way they do not seize in the head. When taking them out cold do so slowly so as not to damage the threads. But really stock plugs are great for their service life, no need to change early.

No anti sieze on the 2.2 Lt spark plugs. There is a chance that the cylinder head can be damaged.

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Old 10-04-2005, 12:31 AM   #8
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Default Re: Change spark plugs?

Quote:
Originally Posted by ssicarman
No anti sieze on the 2.2 Lt spark plugs. There is a chance that the cylinder head can be damaged.
Cylinder head damage by using anti-seize compound????

How so???? (This doesn't make any sense to me as anti-seize prevents the aluminum head threads from sticking to the spark plug threads.)

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Old 10-04-2005, 09:25 AM   #9
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Default Re: Change spark plugs?

I would also like to know how anti seize would damage the threads.Take a look at a plug that has been in an aluminum head for 4 or 5 years and try to take it out.

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Old 10-04-2005, 09:46 PM   #10
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Default Re: Change spark plugs?

I am basing my info from the L-series 2.2 Lt campaign for replacing the spark plugs for misfire. Below is the appropiate info from the campaign.



Notice: This engine has an aluminum cylinder head. Do not remove the spark plugs from a hot engine. Removing spark plugs from a hot engine may cause cylinder head damage. Before spark plugs are removed, allow the engine to cool to below 49 C (120 F).

Replace spark plugs.
Important: Ensure water and debris are blown out of spark plug holes before removing spark plugs.


Remove old spark plugs using a 5/8 in. spark plug socket.

Spark Plug Gap
1.1 mm (0.45 in.)

Notice: Do NOT coat spark plug threads with anti-seize compound. If anti-seize compound is used and spark plugs are over-torqued, damage to the cylinder head threads may result.



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Old 10-06-2005, 06:29 AM   #11
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Default Re: Change spark plugs?

The important thing to note is that it refers to over torquing the plugs which can damage the aluminum head. This can be done with or without anti seize, you must be careful. Anti seize just allows you to remove the plugs at a higher mileage without taking the aluminum threads out with the plug!

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Old 11-05-2005, 08:22 AM   #12
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Default Re: Change spark plugs?

Jog my memory, Saturn always used NGK's as stock plugs, is this not the case with the ECOTEC?

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Old 11-05-2005, 11:18 PM   #13
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Default Re: Change spark plugs?

the 1.9 motors were a saturn design. the ecotec is a gm global division design. while i'm not sure (Can someone verify?), i'd bet there are ac delco plugs in there.

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Old 11-07-2005, 08:46 AM   #14
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Default Re: Change spark plugs?

most of the GMs come with Denso's now

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Old 11-08-2005, 02:37 AM   #15
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Default Re: Change spark plugs?

Quote:
Originally Posted by Bill Murray
most of the GMs come with Denso's now

are they no longer producing their ac/delco brand of plugs for factory use then?

this has me really interested, it would blow ppl's mind about gm. other gm ppl @ my work have a 04 colorado, 05 cobalt, and a 04 deville. should have then check theirs to see how far this spreads. i really thought the denso usage in gm built gm's was limited to s-series saturn modes.

on a sidenote, what does that honda 3.5 in your vue use? for that matter, what does the opel (?) sourced 3.0L engine have?

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Old 03-04-2006, 05:13 PM   #16
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Default Re: Change spark plugs?

what's the torque spec on the plugs or where can i find it? I'm putting the new NGK iridium's in today. FYI for anybody else that plans on doing this, you need a "deep socket" set to get the plugs in... I have to go buy myself a socket today.

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Old 04-20-2006, 01:24 AM   #17
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Default Re: Change spark plugs?

Quote:
Originally Posted by bc3tech
what's the torque spec on the plugs or where can i find it? I'm putting the new NGK iridium's in today. FYI for anybody else that plans on doing this, you need a "deep socket" set to get the plugs in... I have to go buy myself a socket today.

BC3TECH: have you noticed any diffrence in the performance of your car since you changed your plugs? im loking to do the same and what to know if any real diffrence was made?

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Old 04-20-2006, 09:39 AM   #18
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Default Re: Change spark plugs?

haven't had a go at the track yet this year. i'll let you know when I do.

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Old 04-20-2006, 10:50 AM   #19
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Default Re: Change spark plugs?

the saturn repair manual state that the gap for the plug should be 1.0mm. the plugs should be torqued to 20Nm or 15 lb ft.

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Old 04-20-2006, 07:28 PM   #20
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Default Re: Change spark plugs?

Quote:
Originally Posted by DSLaBuda
are they no longer producing their ac/delco brand of plugs for factory use then?
http://www.mlive.com/business/fljour...810.xml&coll=5

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