Spark plug question

[rangrbob]

I have an 89 with a 2.5l and air. Do I have to remove the airconditioning pump and upper radiator hose to get out the front spark plug, or is there a trick to it?

[Eagle]

Dynamite works.

 

That's one of the dumbest setups I've ever seen. Yeah, AFAIK you have to remove the a/c compressor. If you find a trick to avoid that, let me know.

[rangrbob]

That's what I was afraid of. Thanks

[carnuck]

I found a long wobbly extension to do mine.

[tjbliley]

I just saw what I think is the solution to this(I have a 2.5 as well).

 

Harbor freight has a set of spark plug sockets with a built in wobble. They are a cheap and easy fix for this. And they just went on sale. I know HF is cheap stuff, but if it is for a single purpose like this I think it is OK.

[mjeff87]

Not sure if the compressor dimensions changed or not, but I just did plugs/cap/rotor/wires on my 01 TJ 2.5 last weekend. It took me about 20 minutes of rooting around in my toolbox, but I finally found the right size 5/8" plug socket, a 3/8" universal joint, and a small 3/8" extension and got on the plug. Had to snake the socket down over/behind the compressor and blindly guide it over top of the plug, get it seated, then fish the UJ down onto it.

 

What a lovely pain in the azz that was, lemme tell ya. I'm having second thoughts now on adding a factory A/C compressor to my MJ for OBA after going through all that!

 

Jeff

[dragonrider477]

whats the big deal?how often do you need to change plugs on a modern fuel injected engine that burns unleaded fuel?throw a set of double platnium or iridium in it,slam the hood and don't touch them again till the motor blows.the plugs will out last the engine most likely.now wires are a different story.i change the ones on my vehicles every couple of years if there bad or not.old wires develop high resistance and can smoke coils and ignition modules due to the higher amprege required to switch the coil off and on with the old wires.just don't use bargain wires. you get what you pay for. i have always used belden premium and as long as you keep your receipt you'll never have to pay for the wires again.when you are ready for a new set,bring them in to napa and they will swap you a new set for free.(lifetime warranty).

[mjeff87]

being able to "read" a plug tip's condition goes a long way toward preventive maintenence. Plus, I've yet to find a better running plug in any XJ/MJ engine than the plain-Jane Champion :)

[feerocknok]

Spark plugs. The $8 answer to almost all of your vehicles running issues.

I have brands I like, and brands I dislike, but I change my spark plugs way too often. My Audi gets em every other oil change, and my Jeep blew its new motor on the first set. The plugs helped show me why.

[Eagle]

I don't trust platinum plugs. I've heard too many stories of the tip breaking off and taking the top out of a piston.

 

I use nothing but plain-Jane NGKs.

[HOrnbrod]

I don't trust platinum plugs. I've heard too many stories of the tip breaking off and taking the top out of a piston.

 

I use nothing but plain-Jane NGKs.

 

Got a number on these Eagle? Far as I know, NGK does not make a copper plug like Champions, correct?

[feerocknok]

I don't trust platinum plugs. I've heard too many stories of the tip breaking off and taking the top out of a piston.

 

I use nothing but plain-Jane NGKs.

 

Got a number on these Eagle? Far as I know, NGK does not make a copper plug like Champions, correct?

FR5, or shelf number 7373.

It's a copper core with the 'v' notched into the tip.

[HOrnbrod]

Got it - Thanks. I'll give them a shot in my stroker.

[carnuck]

I think the NGKs I put in are 2288s (double ground cold heat range to stop ping)