Too many types of spark plugs.............. - JeepForum.com
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post #1 of 18 Old 08-28-2011, 08:06 PM Thread Starter
HMS
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Too many types of spark plugs..............

What is a good middle of the road spark plug for a 258 motor? I see platinum,
irridium, dual tips, quad tips just too many choices. BT I'll be doing a team rush as I get the extra $$$.

Howard

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post #2 of 18 Old 08-28-2011, 08:17 PM
adams1985cj
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I have always run Bosch Platinum in my CJ they have always worked well for me and the price is only around 2 or 3 bucks.

You donít buy it you build it!!
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post #3 of 18 Old 08-28-2011, 08:18 PM
MoC
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Stay away from platinum and Bosch. I like copper Champion Truck Plugs.

Under A Sun Thats See It All Before...
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post #4 of 18 Old 08-28-2011, 08:19 PM
Ken4444
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In the 258, you always want to run a standard, old-fashioned, copper core, resistor-type spark plug. The Autolite 985 is readily available, low-cost, and works great.

"I give you a republic, if you can keep it." - Benjamin Franklin
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post #5 of 18 Old 08-28-2011, 09:19 PM
keith460
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I second the Autolite 985's as well as Champion Truck Plugs. Steer clear of Platinum, Irridium and other plugs meant for high energy coil on plug type ignition systems.

.
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post #6 of 18 Old 08-28-2011, 10:22 PM
Pacfanweb
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Autolites, and you don't want anything but Copper.

I asked a ref if he could give me a technical foul for thinking bad things about him. He said, of course not. I said, well, I think you stink. And he gave me a technical. You can't trust em. -
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post #7 of 18 Old 08-28-2011, 11:27 PM
Rollbar
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Copper, ask me how I know.
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post #8 of 18 Old 08-29-2011, 01:25 AM
Cutlass327
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Copper, basic, Autolites. So you have to change them every 30k, so be it. There are other things that need done about that time anyways - brakes, lube the dizzy pad, etc.. These vehicles were not designed for long maintenance intervals.

Those fancy plugs are just that, a fancy plug. Bosch Platinums have the anode flush with the ceramic, shrouding it to a pinpoint piece of metal. They foul easy, too. The plugs with the multiple ground straps (electrodes) just shroud the center of the plug too. I was always told that you need a high turbulence chamber for those to get the best air/fuel charge into the gap for the spark to get it. The example of the high turbulence they were talking about was turbochargers and superchargers.

Rick

1978 CJ5 5.0HO/T177/D300, '86 D30/D44 WT axles, 'glass body, 31x10.5 BFG A/T, TDK galv'd frame - DD and weekend toy

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post #9 of 18 Old 08-29-2011, 05:01 AM
waterdowg
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Champion Truck Plugs
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post #10 of 18 Old 08-29-2011, 06:07 AM
twoleos617
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Ive tried the irridium, E3's, etc. all are crap in the 258. go copper as suggessted.
the high dollar E3's i use in my other cars and love them. ive had good luck with them in my 3.8 and 5.3 engines.

Torque is the measure of force that gets the cap off your beer.


Mike D.
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post #11 of 18 Old 08-29-2011, 06:11 AM
Matt1981CJ7
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I asked for "Champion Truck Plugs" at Napa and at O'reilly's and was told they don't make them anymore.

Is this true?

Matt
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post #12 of 18 Old 08-29-2011, 06:12 AM
Ken4444
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Quote:
Originally Posted by Cutlass327 View Post
..So you have to change them every 30k, so be it....
For whatever reason, I have always found that changing spark plugs was somewhat theraputic. It gives you a chance to see what's going on inside the engine, it doesn't have to be done that often (assuming you don't drive 60,000 miles a year), it's cheap, doesn't take too long, doesn't require that you get under the vehicle, and on a Jeep (any many trucks and cars), the plugs are really easy to get to.

"I give you a republic, if you can keep it." - Benjamin Franklin
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post #13 of 18 Old 08-29-2011, 09:14 AM
Renegade82
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I wouldn't put Bosch spark plugs in anything. I have 2 friends who both had bosch plugs that broke and created major engine problems $$$. Even after a letter from the mechanic, and some pics, stating that the plugs were the cause; Bosch wouldn't pay a dime of the several hundred dollar repair bills. I refuse to buy any of Bosch's power tools also, or anything with their name on it for that matter.

I use 985's in mine, but have used Champion's in the past.
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post #14 of 18 Old 08-29-2011, 09:24 AM
esearscj7
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Autolite 985. My jeep did not like platinum AT ALL!
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post #15 of 18 Old 08-29-2011, 09:33 AM
waterdowg
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Just ask for Champion Cooper plugs should be plug number RFN14LY
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