coil packs

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Dec 9, 2009 | 09:29 PM

bcompton35603

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coil packs

My 4.6L Windsor has a coil pack on each side of Engine, so what are the the COP (coil on plug) everyone is talking about? are these just on 5.4 and bigger engines?

Dec 9, 2009 | 09:36 PM

kerim1

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i have a 4.6 expy and it has cop's (coil on plug) that i recently replaced

Dec 9, 2009 | 10:45 PM

97ExpGuy

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From: Southern Illinois

Coil Over Plug (COP) means one coil per spark plug/per cylinder

Coil Pack will look like this:

Dec 9, 2009 | 11:29 PM

alloro

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From: 0,0,1

Quote:

Originally Posted by bcompton35603

are these just on 5.4 and bigger engines?

This used to be the case, but in the early 2000s the 4.6 was changed over to have COPs as well.

Dec 10, 2009 | 05:40 AM

bcompton35603

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ok, I got it...I changed out both coil packs in March along with plugs and wires. Any idea why water is getting in first plugwell on each cylinder bank? have noticed it both times I went to change plugs

Dec 10, 2009 | 12:18 PM

97ExpGuy

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From: Southern Illinois

Quote:

Originally Posted by bcompton35603

More than likely because you did not seal off the plug boot with dielectric grease. When the rubber boot slips down in the plug well, there should be a lip toward the top of the boot that sits on the cylinder head. (You can see this in the picture I posted). Use a good amount of grease under that lip and that will help seal the well. Other users have also put a ring/bead of grease on the outside of the boot as well to ensure moisture or water does not reach the plug and cause problems.

About the issue of both front wells filling with water boggles my mind at the moment. I do know that on the driver's side, the thermostat housing sits above plug 5 (first plug on driver's side) and if it leaks, coolant runs right to that plug.

I'd try sealing those areas off again and see of you have any more problems.

Dec 10, 2009 | 01:01 PM

bcompton35603

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didn't see a photo on the spark plug boots

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Dec 10, 2009 | 02:31 PM

97ExpGuy

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From: Southern Illinois

Quote:

Originally Posted by bcompton35603

didn't see a photo on the spark plug boots

I meant in the first post I did here in your thread. In the mean time, here's a better photo:

Look at where the boot just starts to bend to the left. That 'lip' on the boot that's wider than than the boot itself is where you put the dielectric grease. This lip is what sits on the cylinder head.

Now, I do want you to note this boot is from a 5.4L, but the point I want to make is that there is a lip on the boot, whether 4.6 or 5.4 that comes into contact with the cylinder head. If this point is not sealed off, or the boot dries out, moisture can get under it and short out the plug.