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Replacing spark plugs on LQ1


Kalgorn

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Is it really necessary to remove the upper intake manifold to replace the rear plugs? I recently discovered that my cousin put in Bosch Platinums (:shock:) not too long before I bought the car... I definately need to replace them. I'd rather not have to remove the upper intake manifold.

 

What else can I do to replace them?

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Bet if you did a search, there was a topic about this no less than 30 days ago :wink:

 

ANYWAYS, pull off the top weatherstripping and cut 3 slices into the metal. That should give you plenty of clearance for the 20 extensions you will need to get the plugs out.

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Nope, no need to pull the plenum. I thought so too, but it's NOT NECESSARY! Get yourself a six-inch extension, attached to a u-joint, attached to a two-inch extension, attached to your spark plug socket. Pull the weatherstripping off and you're good to go.

 

I had to bend up a wire coat hanger to get the plugs out of their holes, though. Snag a flashlight and it'll make life easier.

 

It was easy as hell...well, you have to pretty much crawl on top of the engine to get the last plug, but it's easier than pulling the plenum.

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lucky pre-96's :)

Pulling the plenum off 96-97 LQ1's is EASY!!!!! I'd much rather pull plugs on a 96,97 LQ1 then a 91-95 LQ1. I could get the UIM off my cutlass in 2 minutes. seriously....

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But... even pulling the 91-95 style UIM is cake work, I think the last time I did it, it only took about 20 minutes, and that was fighting with some stupid hoses that were tighter than hell.

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96,97 intakes have a seperate throttlebody "arm" to the plenum. vs the 91-95's have an integrated TB. The seperate "arm" makes it really easy to pull the UIM out of the way, because you don't have to deal with throttle cables, coolant lines, wiring.

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its a cake job, i know i can do all 6 of mine in about 20 minutes, just disconnect the dogbone, pull up the weatherstripping and get some odd sized extentions and go to town, it helps greatly if your spark plug socket has a little rubber thing inside it that grips the plug it makes it far easier to get the plugs in and out of the holes.

 

and if you can, get someone to pull the engine foreward, that makes it go quicker.

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