| 2004-2007 Cadillac CTS-V General Discussion Discuss everything about the first generation Cadillac CTS-V that does NOT fall into either the Performance or Appearance Modification category. | Cadillac Forums: 5 hour spark plug change 
04-05-09, 04:52 PM
| | Cadillac Owners Fanatic Cadillac(s): 2005 CTS-V | | Join Date: Oct 2008 Location: The City | | | 5 hour spark plug change About six months ago, I'd purchased some new spark plugs and wires with the intention of changing them within a week or so. After searching this forum and finding posts regarding installation, I'd decided to wait for warmer weather.
Well, warmer weather has arrived, and I finally got around to it this weekend and spent a good portion of Saturday afternoon changing everything. The job wasn't bad, with the exception of the removal of the old wires. There clearly isn't a lot of room on the passenger side. The difficulty of the job was compounded by the fact that the plugs on the passenger side are pointing towards the rear. The dipstick tube at the number 4 cylinder didn't help either.
In all, it me about 5 hours to get the job done, which may be a record time for a spark plug and wire change. Some parts of the job required that I take my mechanics gloves off (in some of the really tight spots) but in all, I have no scratches or cuts, which is pretty amazing to me since I have large hands.
The overall result is that the car runs smoother and it has noticeably quicker throttle response. The car appeared to have the original plugs and wires from when it was new. There was evidence that at least two of the OEM wires had voltage leakage, so it was time that they got replaced.
In all it was an interesting experience, and I wouldn't hesitate to do it again if need be. Hopefully a little quicker next time.
-Cory | 
04-05-09, 04:57 PM
|  | Cadillac Owners Member Cadillac(s): 05 maggied CTS-V, 03 maggied Z06 | | | | | Re: 5 hour spark plug change Removing the battery makes the passenger side a lot easier to work on.
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04-05-09, 05:17 PM
| | BLING IS AMERICAN RICE Cadillac(s): '04 CTS-V | | Join Date: Jun 2004 Location: Just North of Titletown... | | | Re: 5 hour spark plug change My SHO used to eat plugs since I was getting moisture in the plug wells. I replaced the plugs maybe 6-7 times until I got the moisture problem fixed. But I got it to where I could change the plugs in 20 minutes. That was a feat considering it was a transversely mounted engine with a huge intake manifold and had a strut tower brace blocking the way.
I did mine on the V while the headers were being changed. With B&B headers, the plugs and wires can now be done in 45 minutes or so...
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04-05-09, 05:21 PM
| | Cadillac Owners Connoisseur Cadillac(s): Maggied 2004 CTS V Black Raven cause its faster | | | | | Re: 5 hour spark plug change I had mine done when the Maggie went on (and went colder too) but since I was running SUPER rich after my PCM debacle I should at least pull one and check them but I really dont feel like spending 5 hours doing this. | 
04-05-09, 05:27 PM
| | Cadillac Owners Fanatic Cadillac(s): 2005 CTS-V | | Join Date: Oct 2008 Location: The City | | | Re: 5 hour spark plug change Quote:
Originally Posted by heavymetals Removing the battery makes the passenger side a lot easier to work on. | Thanks heavy. I'd read that in a few posts, but I decided that I didn't want to go that route. I ended up removing the coils for both sides and that gave me the access that I needed. It also helped with getting the old wires off and the new wires on. I will say that it was the passenger side that took 80% of the total job time. Quote:
Originally Posted by thebigjimsho My SHO used to eat plugs since I was getting moisture in the plug wells. I replaced the plugs maybe 6-7 times until I got the moisture problem fixed. But I got it to where I could change the plugs in 20 minutes. That was a feat considering it was a transversely mounted engine with a huge intake manifold and had a strut tower brace blocking the way.
I did mine on the V while the headers were being changed. With B&B headers, the plugs and wires can now be done in 45 minutes or so... | 45 minutes?! I guess that's a mod in my future. I have a B&B catback with resonator in the car now, and I've been contemplating a set of B&B headers. | 
04-05-09, 05:31 PM
| | BLING IS AMERICAN RICE Cadillac(s): '04 CTS-V | | Join Date: Jun 2004 Location: Just North of Titletown... | | | Re: 5 hour spark plug change Quote:
Originally Posted by SFBayV Thanks heavy. I'd read that in a few posts, but I decided that I didn't want to go that route. I ended up removing the coils for both sides and that gave me the access that I needed. It also helped with getting the old wires off and the new wires on. I will say that it was the passenger side that took 80% of the total job time.
45 minutes?! I guess that's a mod in my future. I have a B&B catback with resonator in the car now, and I've been contemplating a set of B&B headers. | Tons more room with the B&Bs. And you also know what you need to move now... | 
04-05-09, 05:33 PM
|  | 1,000,000,000 posts Cadillac(s): 2004 CTS-V | | | | | Re: 5 hour spark plug change Quote:
Originally Posted by SFBayV About six months ago, I'd purchased some new spark plugs and wires with the intention of changing them within a week or so. After searching this forum and finding posts regarding installation, I'd decided to wait for warmer weather.
Well, warmer weather has arrived, and I finally got around to it this weekend and spent a good portion of Saturday afternoon changing everything. The job wasn't bad, with the exception of the removal of the old wires. There clearly isn't a lot of room on the passenger side. The difficulty of the job was compounded by the fact that the plugs on the passenger side are pointing towards the rear. The dipstick tube at the number 4 cylinder didn't help either.
In all, it me about 5 hours to get the job done, which may be a record time for a spark plug and wire change. Some parts of the job required that I take my mechanics gloves off (in some of the really tight spots) but in all, I have no scratches or cuts, which is pretty amazing to me since I have large hands.
The overall result is that the car runs smoother and it has noticeably quicker throttle response. The car appeared to have the original plugs and wires from when it was new. There was evidence that at least two of the OEM wires had voltage leakage, so it was time that they got replaced.
In all it was an interesting experience, and I wouldn't hesitate to do it again if need be. Hopefully a little quicker next time.
-Cory | did you take any pics?
what was your main reason for changing them and what is your mileage? | 
04-05-09, 05:47 PM
| | Cadillac Owners Fanatic Cadillac(s): 2005 CTS-V | | Join Date: Oct 2008 Location: The City | | | Re: 5 hour spark plug change Quote:
Originally Posted by CadzillaTN did you take any pics?
what was your main reason for changing them and what is your mileage? | Nah, no photos. The mileage on the car was 52,111. The main reason for the swap was that I didn't know the history of the car since I bought it used, so I didn't know if anything had ever been replaced. And I just thought that it was time. | 
04-05-09, 05:50 PM
| | Cadillac Owners Fanatic Cadillac(s): 2005 CTS-V | | Join Date: Oct 2008 Location: The City | | | Re: 5 hour spark plug change Quote:
Originally Posted by MauiV I had mine done when the Maggie went on (and went colder too) but since I was running SUPER rich after my PCM debacle I should at least pull one and check them but I really dont feel like spending 5 hours doing this. | Mine took 5 hours because I hadn't changed the plugs and wires on a V before. Now that I have a procedure to follow, and since the boots aren't stuck on the plugs, it should only take a fraction of that if I need to do it again. | 
04-05-09, 05:54 PM
| | Cadillac Owners Fanatic Cadillac(s): 2005 CTS-V | | Join Date: Oct 2008 Location: The City | | | Re: 5 hour spark plug change Quote:
Originally Posted by thebigjimsho Tons more room with the B&Bs. And you also know what you need to move now... | Aye, tis a bit on the noisy side, but sweet! Headers will sound much better, but I can't imagine driving the car and making that much noise at 6:20 am when I leave everyday! | 
04-05-09, 11:18 PM
| | BLING IS AMERICAN RICE Cadillac(s): '04 CTS-V | | Join Date: Jun 2004 Location: Just North of Titletown... | | | Re: 5 hour spark plug change Quote:
Originally Posted by SFBayV Aye, tis a bit on the noisy side, but sweet! Headers will sound much better, but I can't imagine driving the car and making that much noise at 6:20 am when I leave everyday! | Wake those greeney bastards up! Even better when you go sans cats... | 
04-05-09, 11:45 PM
|  | It's a V thing. Cadillac(s): 05 LS6 Stealth Grey | | Join Date: Dec 2004 Location: Tailgating at Giants Stadium Age: 29 | | | Re: 5 hour spark plug change There is a guy that frives a Ford 350 diesel with 4 inch stacks by my house every day at 1 am. I live in a quiet neighbor hood. I hate the bastard. When he was coming down the hill in the snow and missed the turn, broke his axel in front of my house, I cheered from the front window. Go for it. | 
04-05-09, 11:49 PM
|  | It's a V thing. Cadillac(s): 05 LS6 Stealth Grey | | Join Date: Dec 2004 Location: Tailgating at Giants Stadium Age: 29 | | | Re: 5 hour spark plug change Do you charge by the hour? Seriously. | 
04-05-09, 11:56 PM
| | BLING IS AMERICAN RICE Cadillac(s): '04 CTS-V | | Join Date: Jun 2004 Location: Just North of Titletown... | | | Re: 5 hour spark plug change Quote:
Originally Posted by ahahnu Do you charge by the hour? Seriously. | Do you have aftermarket headers? That's huge... | 
04-06-09, 12:03 AM
|  | It's a V thing. Cadillac(s): 05 LS6 Stealth Grey | | Join Date: Dec 2004 Location: Tailgating at Giants Stadium Age: 29 | | | Re: 5 hour spark plug change No.... not currently. I've been bitten by the bug. But it's not gonna happen yet. Talk more at V day. | | Cadillac Discussion Tools | | |
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