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How-To: Remove and Replace the Coil Pack and Spark Plugs.

4687 Views 4 Replies 3 Participants Last post by  Blasirl
This is really my first attempt at a How-To video. If I have botched something, messed up the text etc., let me know and I will try and fix it. I have to apologize ahead of time for the sudden jolt of music. I had the radio playing in the background and apparently that is a copyright offense.

So because I am having issues with the ignition system, I figured I would change out the coil and plugs to see if that would take care of the issue. Unfortunately it did not, but I will try and document that elsewhere.

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· COTM Winner
2012 Cruze LTZ 1989 StarQuest 2004 TrialBlazer EXT
897 Posts
Nice one I especially appreciate the bit about the plug socket running off with your 10mm
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· Administrator
2014 LT program car, Pull Me Over Red, 1.4T Auto
14,185 Posts
Discussion Starter · #4 ·

Tips to ensure no misfires occur:

Remove the coil pack. If the boots are stuck on, use a small screwdriver or pick with some dielectric grease on it to go around the outside of the boot and then possibly the inside of the boot to help aid in removal.

Remember to (p)re-gap your plugs to .028, (0.24 if tuned)

Set gap with the black portion of this tool.

To increase the gap size bend the ground strap up to the desired height. DO NOT LET THE GAPPING TOOL TOUCH THE IRIDIUM CENTER ELECTRODE OR PORCELAIN.

Measure the gap with feeler gauges.

Throw this away.

Torque to 18 ft-lbs with no anti-seize on the threads of a stock type plug.

Ensure the boots have no rips/tears or holes in them, lightly coat them with dielectric/silicone grease and make sure the resister springs are clean and not caught up in the boots when you install them.

If the plugs look bad, consider these:

-BKR8EIX-2668 (iridium plugs), ~$25, expect ~10-15k regaps on these, ~40-50k overall life.
-BKR7E-4644 (nickel/copper plugs), ~$8, expect 15-25K out of these plugs, with a regap or two required at 5-8k intervals on stock tune.

Read Hesitation Gone! for more info on the plugs.

A good replacement coil is the MSD Blaster OEM Replacement Coilpack 8236

How-To: Remove and Replace the Coil Pack and Spark Plugs.

While you are in there, if you have a cheap endoscope, look at the pistons. This can also tell you many things.
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