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Old 05-06-2014, 08:15 PM   #1
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Spark Plug Boot - 00 GT

About to change out spark plugs. I also bought some new coil boots. Do I really need to change the boots out or should I just do the plugs?
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Old 05-06-2014, 08:35 PM   #2
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Mileage? If you are near, at, or over 100k miles you should do the boots AND the springs in the COPs. Or just replace the COPs but that is a $350 purchase vs just $30 fro the boots/springs.
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Old 05-06-2014, 08:40 PM   #3
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Ok yeah I'm at 142k
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Old 05-07-2014, 05:56 PM   #4
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I have always suggested to people to run oem cops is that correct Scotty?
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Old 05-07-2014, 07:21 PM   #5
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Yes OEM only.
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Old 05-07-2014, 08:04 PM   #6
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Yes OEM only.
could you explain ? why do you say oem only just wondering..
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Old 05-08-2014, 06:57 AM   #7
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Because they last far longer than any aftermarket brand and all the aftermarket advertising about how their coils "burn hotter" or "produce more spark" is complete snake oil.

As I said, you can just rebuild your COPs with a $30 kit.
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Old 05-08-2014, 03:20 PM   #8
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I agree with you scotty
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Old 05-08-2014, 04:20 PM   #9
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I run own coils also but I did buy a cheap jegs coil for 15 bucks to keep in the trunk for emergencies. Remember to use proper torque setting. Don't want a blowout. Why ford thought that 4 threads would hold anything is beyond comprehension
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Old 05-08-2014, 09:41 PM   #10
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Because they last far longer than any aftermarket brand and all the aftermarket advertising about how their coils "burn hotter" or "produce more spark" is complete snake oil.

As I said, you can just rebuild your COPs with a $30 kit.
thanks , so if you rebuild them with the kit they are as good as buying a new one ?
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Old 05-09-2014, 09:38 AM   #11
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A coil is a coil.. It works or it doesnt. The OEM coils have a better track record of reliability, but they cost the most. The cheap ebay coils will work just as good....if they work. The generic coils have less quality control so the chances of getting one DOA or having one fail quickly is a very good possibility.

You can get a set of 8 generic coils on ebay for $50. at that price you could buy up to 56 generic coils for the same price of 8 oem... this is a calculated risk. You will definitly have failures with generic coils.

Replacing boots and springs wont bring a dead coil back to life. If the coil is dead it has to be replaced.
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Old 05-09-2014, 10:37 AM   #12
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thanks , so if you rebuild them with the kit they are as good as buying a new one ?
If there is nothing wrong with your COPs as they sit right now, rebuilding them is a great preventative measure and very easy to do while they are off anyway for the spark plugs. The springs/boots will not bring back one where the actual electronic component is kaput though.

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A coil is a coil.. It works or it doesnt. The OEM coils have a better track record of reliability, but they cost the most. The cheap ebay coils will work just as good....if they work. The generic coils have less quality control so the chances of getting one DOA or having one fail quickly is a very good possibility.

You can get a set of 8 generic coils on ebay for $50. at that price you could buy up to 56 generic coils for the same price of 8 oem... this is a calculated risk. You will definitly have failures with generic coils.

Replacing boots and springs wont bring a dead coil back to life. If the coil is dead it has to be replaced.
I'll pay the extra $$$ to not be chasing bad cops or have a random failure that requires a tow. Can just see it now. REALLY have to be somewhere important and the car starts stuttering and crapping out because I was too cheap to buy OEM. I'm not saying this can't happen with OEM either but the failure rate of the OEM ones is miniscule compared to the generics.
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Old 05-09-2014, 11:51 AM   #13
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I agree... You buy OEM for its reliable track record.

Generic cops will have a higher failure rate... Its a calculated risk that is up to the buyer to decide what suits his needs the best.

OEM are the best, however there are legitimate cost/value options to consider

Example: a higher mileage car has a cop that is malfunctioning due to the harsh environment it operates in. the other 7 cops have operated in roughly the same environment for just as long. Chances are, another failure may be right around the corner.

Option 1:
You can buy 1 oem for the cost of 8 generics, and you might have to buy 1 or 2 more oem coils in the next year or two as the remaining stock units might start to malfunction, bring you total up to $150 or more.....Hypothetically.

Option 2:
You can buy 8 generic cops for the price of 1 oem unit. Chances are that one or two of them are sub par, netting you ~6 functioning cops for the price of one oem. You can replace the faulty stock unit and still have 5 spares if another stock unit begins to fail. You have fixed the problem and you are prepared for several more failures all for $50.

Of course option 1 is the most trouble free option, but at a hefty price tag.
Option 2 contains more variables and possible swaps, but is budget friendly.

It is a calculated risk to be decided by the owner. If u plan on keeping the car for another 100k miles than obviously option 1 might be best, but if u may be getting rid of it in under 50k miles or so, than option 2 looks to be the financial winner.

Choices, choices.
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Old 05-09-2014, 07:56 PM   #14
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Option 3 is to replace them all at once to the tune of $330 or so. You only really have to do it every 100k so its really not expensive.

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Old 05-10-2014, 08:19 AM   #15
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Yep that's what I did went with Motorcraft Platinum plugs and Autolite Boots. Runs great
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Old 05-10-2014, 09:18 AM   #16
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Option 3 is to replace them all at once to the tune of $330 or so. You only really have to do it every 100k so its really not expensive.
Agree. That is really the most complete answer for anyone who doesn't mind dropping the coin.
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Old 05-10-2014, 03:06 PM   #17
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So I was reading all these posts and I agree on every aspect. The one thing that really stuck out...BLOWOUTS...I have had 3 different plugs blowout 2 on the driver side and the other on the passenger. I have had them all fixed or rethreaded. So when you do your plugs...ABSOLUTELY torque your plugs and go with OEM COPS. It is not a comforting feeling when you got to call a tow truck when a plug blows...very frustrating. Now I am in the crossroads of either getting the others rethreaded, or just buy a new set of PI heads at the same cost of just fixing the others. Actually leaning towards new heads to be honest. Can anyone shine a little light on these blowouts other than the previously mentioned poor design by Ford?? Just curious on what you guys think

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Old 05-10-2014, 03:35 PM   #18
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The blowouts happen from most PI heads having 4 spark plug threads and people trying to tighten them without a torque wrench.

I still hear the old "I tighten them and then 1/4 turn" or "I have a calibrated elbow". This is what torque looks like on a spark plug. As you can see you require a torque wrench to get it right. Set to 12ft lbs or 145 inch lbs and go. 15 is max torque. People doing 1/4 turn are dumbasses.
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Old 05-10-2014, 04:32 PM   #19
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I did just that...torqued everything and still had blowouts. But this last time, the fuel regulator went out replaced ot as well along with the heli coil and new cop. And when the three plugs blew, it all happened on intial start of the car. What are other possibilities that could cause the plugs to blow out like they did?

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Old 05-10-2014, 05:36 PM   #20
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At some point someone overtorqued or you had a bad torque wrench.

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