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Old 02-15-2005, 10:37 AM   #1
dputman
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Replacing 2003 z06 spark plugs

I am about to change the spark plugs in my 2003 z06.
How do you get to them? Enter from the top, bottom, or do you remove a front tire?
dennis
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Old 02-15-2005, 10:48 AM   #2
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I guess it is like the C5! You just have to open the hood, remove the fuel rail covers and you will see some black lines going to the engine ( 8 ).
These are the plug wires, this is were are located the spark plugs. It is an easy job. It's gonna take you not more than an hour.
Good luck! Try the iridium plugs, I heard they are better and have them on my C5!
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Old 02-15-2005, 12:28 PM   #3
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fuel rails

How do you remove the fuel rails? Do they snap in or are they bolted?
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Old 02-15-2005, 12:29 PM   #4
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fuel rail covers

Sorry,
I meant to say, "How do you remove the fuel rail covers?"
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Old 02-15-2005, 12:48 PM   #5
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It is really easy to remove, there isn't any bolt! Just don't apply to much strenght to remove them, it could break one of the pieces which are made to hold the cover on the rails (sorry I don't know the name in English)! I hope you know what I mean!
But don't worry, it is a really easy work!
For the covers, you can almost remove them with one finger! really easy
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-----> < -----
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Old 02-15-2005, 02:39 PM   #6
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thank you

Thank you very much! I didn't want to tear anything up.
dennis
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Old 02-15-2005, 03:16 PM   #7
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No problem, if you need anything we are here to help!
That's the best place you will find!
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Old 02-15-2005, 04:05 PM   #8
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now is this job as easy as just getting The plugs from the store and then removing the Rail covers and then Locating the plugs (the black wire you were just talking about) and then just install the new ones?

or is thre gapping that has to be done or something else.

I have never Done the pluggs on any of my cars except my 1978 Camaro since it was very Easy to do.

The LT1 was like a huge mess everything was So tight in there that i couldnt even tell where the plugs where lol

So is there any place on the net That has exact ways of doing it and whats a good spark plug for a stock ignition set up.
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Old 02-15-2005, 07:01 PM   #9
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I just installed NGK TR55s on the weekend.gapped at .60.Torque to 11 ft lbs.I used a dab of anti sieze compound on the ends,the manual doesn't say to,but i just feel better since the heads are aluminum.My stock plugs were a mess,6 of the 8 didn't even have electrodes.I have 45,500 miles.

My idle seems smoother,haven't scanned the car yet.I think it took me 45 minutes including gapping them.
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Old 02-15-2005, 07:49 PM   #10
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so over all then its a pretty much straight foward kinda job?
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Old 02-15-2005, 08:03 PM   #11
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Quote:
Originally posted by brokentwice
so over all then its a pretty much straight foward kinda job?
I had a trans-am,c3-c4 and c5....the c5 is the easiest car iv'e worked on.Dude the c4 sucks for plugs..
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Old 02-16-2005, 08:20 AM   #12
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plug replacement

Hey guys.. Thanks for the help on the information.
My car had developed a small fish bite plus a little less ump in 4th, 5th and 6th gear so I decided to put in some new spark plugs. I talked to our local GM AC/Delco rep about titanium plugs for my 2003 zo6. He informed me that all GM vehicles from 2000 up came factory with titanium plugs. That's how they are getting the 100,000 mile tune ups (so he states).. He also said the plugs for a 2003 c5 and the z06 were the same number plug. He also said they were iranium/titanium (I may have spelled that wrong). He states this iranium/titanium plug is a special plug designed to work well with our computer systems. I plan to install them shortly. They are like $6.50 each.
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Old 02-16-2005, 12:02 PM   #13
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Re: plug replacement

Quote:
Originally posted by dputman
Hey guys.. Thanks for the help on the information.
My car had developed a small fish bite plus a little less ump in 4th, 5th and 6th gear so I decided to put in some new spark plugs. I talked to our local GM AC/Delco rep about titanium plugs for my 2003 zo6. He informed me that all GM vehicles from 2000 up came factory with titanium plugs. That's how they are getting the 100,000 mile tune ups (so he states).. He also said the plugs for a 2003 c5 and the z06 were the same number plug. He also said they were iranium/titanium (I may have spelled that wrong). He states this iranium/titanium plug is a special plug designed to work well with our computer systems. I plan to install them shortly. They are like $6.50 each.
Can I ask why you're changing them? Especially if you're going with the OEM plugs? Does your '03 have that many miles or ?
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Old 02-17-2005, 01:52 PM   #14
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reason for replacing spark plugs

The reason for replacement of my plugs is I am experiencing very minute fish bite in 4th, 5th, and 6th gear. This is happening while cruising with very little load on the engine then having to give it a little more gas to pass or change lanes. I have 28,000 miles on them and it can use a fresh set.
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Old 02-17-2005, 08:15 PM   #15
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The only problem you will have changing the plugs will be # 7 plug.. It's semi hard to get to.. While your at it, I would get a set of GM Racing wires.. They are better than stock, and my hunch is that you might have one of them breaking down. I had that problem one time. Wire just gave out.

Your only looking at another 4o or 50 bucks.

Now to #7 plug, if you look at the exhaust manifold, Left habd side (drivers) you will see a pipe with 2 I think 10 mm bolts holding it on.. remove this pipe and you can then move the hose that is attached to it out of the way.. This will allow you to get to the plug wire and plug better.. Not a lot of room down there. Also go to the dealer and get a new gasket for the pipe, make darn sure you get it back on right, or it will cause an error code to pop up. I think po410. I used some gasket sealer to hold it in place.

The rest of the plugs are very easy to get to..

Good luck and hope this helps.

Ernie
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