92 LT1: Spark Plugs
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
92 LT1: Spark Plugs
I am about to change the 17 year old spark plugs in my 92!
I'm posting because I'm procrastinating. It doesn't look like fun
I picked up the NGK TR55 platinum plugs for replacement. Seems like everyone likes the regular old copper TR55 the most - but I don't ever want to change these for another 17 years.
I'm posting because I'm procrastinating. It doesn't look like fun
I picked up the NGK TR55 platinum plugs for replacement. Seems like everyone likes the regular old copper TR55 the most - but I don't ever want to change these for another 17 years.
Le Mans Master
Joined: Aug 2004
Posts: 5,141
Likes: 7
From: Metairie Louisiana
I bought one of these cut down sockets off of ebay. You could probably make your own much cheaper. The one I bought also came with a GMGoodWrench tool with one open end and one wratching end. I picked up as many 5/8 sockets of different lengths as I could find. Plugs are very easy now. I can remove all 8 in about 20 minutes. Reinstallation takes a little bit longer. I do have headers which may also makes it easier. I change plugs at least once a year some times more.
http://cgi.ebay.com/ebaymotors/LS1-L...05126009r38224
http://cgi.ebay.com/ebaymotors/LS1-L...05126009r38224
Instructor
Joined: Feb 2001
Posts: 117
Likes: 1
From: Acworth Ga
Why? You only got 85K on them. Seriously though, it is a pain but worth it. It did mine at 100K (daily driver) but not the wires. Big mistake. Do them both at the same time. Got 130K on her now and she's going strong. When you start to do it be sure you blow out the area around each plug real good and I put some spark plug antisieze on the threads when I installed the new ones. I used the same antisieze compound used on aircraft spark plugs. I'm in the business so it was easy for me to get. You might find it at the auto parts store, I'm not sure. Using it makes it easier to install and torque. Take your time with this project. Good luck.
Racer
Joined: Oct 2008
Posts: 423
Likes: 48
From: winchester Virginia
not as bad as you imagine
Did mine (92 lt1) about a month ago, took off the driver side air pipe and all 4 brackets that hold the plug wire looms. After that not to difficult at all; just have lots of different length extensions and bandaids available.
good luck, efish
good luck, efish
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
Why? You only got 85K on them. Seriously though, it is a pain but worth it. It did mine at 100K (daily driver) but not the wires. Big mistake. Do them both at the same time. Got 130K on her now and she's going strong. When you start to do it be sure you blow out the area around each plug real good and I put some spark plug antisieze on the threads when I installed the new ones. I used the same antisieze compound used on aircraft spark plugs. I'm in the business so it was easy for me to get. You might find it at the auto parts store, I'm not sure. Using it makes it easier to install and torque. Take your time with this project. Good luck.
The plug wires are newish - about a year old - Taylors.
Got the anti seize.
Still stalling
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
You remind me of ................. me !!!!
Here's what you do........do the hardest plug first, the #8. Once you have that tackled, it is all downhill. On the driver side, just remove the 2 bolts that hold the ASF to the wheel well, move it out of the way. Don't mess with taking off any airpipes as they will more than likely bend.....Your '92 LT1 does have ASR, right ?
You know what.....you still have Sunday...you can procrastenate one more day !!!!!
Moderator Emeritus
Joined: Jun 2002
Posts: 46,133
Likes: 111
From: Maryville Tn
CI 5 thru 12 Veteran
St. Jude Donor '09 thru '23
NCM Sinkhole Donor
Don't be intimidated by the spark plug change on the LT1. Unbolt the ASR on the drivers side (3 bolts) and lift it up to do the drivers side. The passenger side isn't that bad at all (except for the plug at the back of the engine). The swivel head socket is your friend. You can do it!
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
Likes: 4
From: Tracy CA
I'M DONE!
The passenger side was the most difficult. The driver side - I pulled the wheel and the fender housing. That made the driver side the easier side.
result: 2 plugs were missing platinum pucks, one wire was loose. The car is much smoother now.
Thanks for the thoughts!
Mitch
The passenger side was the most difficult. The driver side - I pulled the wheel and the fender housing. That made the driver side the easier side.
result: 2 plugs were missing platinum pucks, one wire was loose. The car is much smoother now.
Thanks for the thoughts!
Mitch
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I actually have to take mine out to get the passenger header off 
Safety Car
Joined: May 2002
Posts: 4,659
Likes: 82
From: Toronto ontario
I change my plugs ever week or so just cause it takes 15 minutes and its fun to see how the cyls are running 
Thread Starter
Drifting
Joined: Dec 2002
Posts: 1,474
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From: Tracy CA
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Instructor
Joined: Jan 2009
Posts: 151
Likes: 0
Boy I can see there is a smart a** here I have a 88 & on the pass side I found a little plate to take out to get to the front one & a lot of bandaids & to put that plug back in I used a piece of hose on the plug to get it back in !!!! unless you have a hand that's smaller than a half dollar ????? & yes I do have the tools !!!!
