So many threads have gotten started asking how to change the #3 plug because the intermediate shaft is in the way. "Typically" people say to wedge the socket on, use a wobble, this that an the other thing. They end up fighting with something they don't have to.

So I've decided to show the "EASIEST" way to change the #3 spark plug, (It is by no means the only way). My how-to can be done in about 5 minutes.

Tools needed.
11mm socket
Socket Wrench
2 or 3 Extensions
Flathead screw driver (or prybar if rusty)


Step 1: Turn your wheels straight and leave the ignition key forward enough to keep the steering wheel unlocked.

Step 2: Open the rag joint cover at the base of the intermediate steering shaft.

Step 3: Remove the 11mm bolt at the base of the intermeiate

Here in the picture we see the plastic rag joint cover. The red arrow points to the circled 11mm bolt that has to be removed.

http://www.pghconsulting.net/teal/spark/spark1.jpg

Here is a pic of the bolt removed

http://www.pghconsulting.net/teal/spark/spark2.jpg

Step 4: Use a large flat head screw driver at the base and pry outwards. The steering shaft will start telescoping in on itself. (If your intermediate shaft is a bit rusty, simply spray the shaft with wd40 or similar and use a prybar instead of the screwdriver. Don't worry about prying to hard, the shaft can take a lot. )

http://www.pghconsulting.net/teal/spark/spark3.jpg

Step 5: Lift Steering shaft out of the way (don't worry, the top is fairly mobile)

http://www.pghconsulting.net/teal/spark/spark4.jpg

Do not worry about how you put the shaft back on. The shaft and the splines on the steering box are keyed. (Meaning it only goes on one way) Avoid spinning your steering wheel all the way around though. You don't want to bust the clock spring in the steering wheel.

http://www.pghconsulting.net/teal/spark/spark5.jpg

Here we now see the # 3 plug fully accesable. Simply use a couple of extensions and a spark plug socket to remove.

http://www.pghconsulting.net/teal/spark/spark6.jpg

When putting in new spark plugs, even if you are told they are pre-gapped, take no chances. Check your gap with a gap tool. It's a .25 cent tool, get one! Also you can spread anti-seize on the threads of the sparkplug so you don't have difficulty later. Also use dialectric grease inside the plug boots. This way you won't have a prob when you need to pull them off later and it will create a better contact between the wire and the plug.

Here is a shot of the AC-Delco Rapidfires that I installed. Note the gold tone, that is the anti-seize.

http://www.pghconsulting.net/teal/spark/spark7.jpg

Total time to change all 6 plugs was 20 minutes. This includes collapsing and reinstalling the intermediate shaft. This way you don't have to worry about trying to work other tools in there.

Good post, wish I would have had it a couple of months ago when I did my wire/cap/rotor/plug change!!!

Heh, will keep this in mind for next time though!

=)

Another great thread. Now that people can see how to do it, maybe they'll believe us when we tell them it's easier than fumbling with multiple swivels and extensions.

Hey the pic worked the first time this time lol.

Great post!

Pretty awesome!

Thanks again rlith, first it was the door hinge bushing post and now this!!! you are a life saver

Great info. I wish I had that last fall when it took me 2 hours to change all my plugs. LOL.

Glad its not this difficult on an 89 model . But a body lift helps with clearance . Another good job . Rob

I might actually need this for v8 because from plug 3 on back its a no go lol.

Thats awesome, just another idea as well...snap-on makes an offset sparkplug socket that works great too

I guess my question would be....would this effectthe air bag system in any way?? Just dont want to set off my airbag over a spark plug...lol

I guess my question would be....would this effectthe air bag system in any way?? Just dont want to set off my airbag over a spark plug...lol

No, it won't affect the airbag system. Your airbag sensors are actually under the core support, so unless you bang those with a hammer you've got nothing to worry about

good advice, dude master, i also found on my 2001 jimmy, the flap behind the front wheels/tires, if lifted up, gives good acess to the other 5 plugs, and nothing above has to be removed. i got off easy last time i changed #3, as i used a wobble socket extention and ground a few mm's off both ends of the spark plug socket. it was still hard, but went better that witha regular socket. p.s. are the ac/delco's you put in working well, i put in a set of bosch platnum +2's and i don't think it was worth the money. thanks for the info/helpand graphics are always good!!!
excheezhead.

Thanks for the easy steps, even on my 2001 blazer it was almost exactly as you wrote. Im a complete car novice (can hardly change my own oil if i had to) And i got this granted it was a biatch my engine cavity had about 10x the wires as shown in your pictures but with a little TLC you can make it happen!

Excellent tip. I used it today. It greatly shortened the time it took to change the plugs.

Thanks again.

Rick

Nice post! Although I found it easier to just remove the wheel and that flap (just tore it off). Then went straight in , also i popped out the rubber stopper in the plug socket. Don't worry i replaced the flaps.

Has anyone else thought to lift the engine up about an inch after that it is a shot above that steering rod.

I have a '99 Blazer and this came in very helpful. I had to pull the air filter unit off first as that was above the steering shaft.

The other thing that is helpful is a spark plug boot puller. I used one my neighbor had and I am going to order one of my own. It was the OTC-7078. It is currently available on americanhomeoutlet.com for $4.95 each. Search for otc7078.

Thanks Rlith for the excellent tip! As a side note, I found a "pickle fork" makes a perfect pry bar for the steering shaft. Also, a few squirts of Dupont Silicone Spray applied to the rubber in the spark plug socket makes for easier socket removal AFTER installing new plugs.

I just used a breaker bar witch had enough clearence to loosen the plug until I could just finish removeing it by hand and to put the plugs back in I've always used a 6-8in piece of vacum hose to help fight cross threading.

This is the most helpful peice of info. Thanks a bunch. I changed my plugs about 6 months ago and couldn't get to the # 3 spark plug :banghead: Now with the help of you I can.

Has anyone else thought to lift the engine up about an inch after that it is a shot above that steering rod.

Problem with that is that you stress the motor mounts

well i'm new here ..... someone mentioned lifting the flap inside the wheel well to get at the #3 spark plug -- that is the way i've seen most gm techs do it and is also how i do it - i just use a 5/8 spark plug socket followed by a swivel ( or knuckle ) then a couple of 3 inch extentions on a 3/8 ratchet - its really crampped in there for big hands but it does work - and might as well do number 5 plug while you are there .

Thank you for this write up, after an hour of finageling and cursing I came in to do some research. After finding this thread, everything was back to normal in 20min. You are a life saver. kudos!

good thread

The way i change the #3 plug is I use a snap on spark plug socket with a 18mm stubby wrench this allows you to get right in there behind the steering shaft and take the plug right out. sometimes it is also easier if you cut the rubber over the shaft. Then to put the plug in i use a little piece of 3/8'' rubber hose on the end of the spark plug to help me start the plug in the hole GOOD LUCK

I didn't have a problem using a wobble and an extension from the fenderwell. I believe I have a plastic cover over the area you show the bolt at, I'm not exactly sure. It was easier getting the plug out than it was getting the wire off :)

It was easier getting the plug out than it was getting the wire off :)
true. the second easiest way to get this plug is to put the plug socet over that plug and use a wrench from up top.

Many Thanks to TOM B and RLITH and everyone. The link to RILTH was absolutely amazing advice. I may have given up on getting the Number 3 Plug out but the pictures along with the advice regarding the disconnection of the intermediate steering shaft from the steering box for access was right on the money and nothing short of pure brilliance!

So then, did the "tune-up" get rid of the misfire? Unfortunately the answer is no. But because at the very least I have 6 new plugs/wires, the misfire no longer stalls me and I could get to work.

Right now I still have two error codes. The P0300 (Random Misfire) and the specific P0305 (Number 5 Cylinder Misfire).

Have poured in to the fuel SEA FOAM and have driven the Blazer 120 miles without success. My biggest obstacle is being totally down and missing work which of course isn't good.

I don't know if I have the talent to pull-off an injector replacement in a short period of time. I know the injector is about $90-100.

Any idea on labor or how labor intensive this kind of a job is?

Thanks again to all. I know that at some point I will get to the bottom of it. Soon I hope.

Paul T

Now this works great.. Saved a lot of time the second time around.. didn't even bust a nuckle..