Spark Plug???

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Jun 19, 2010 | 11:02 AM

cobra29

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Three Wheeling

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Spark Plug???

I am changing my spark plugs and I trying to figure out what's the gapping. My spark plug is Bosch Platinum Plus. Any help is greatly appreciated.

Jun 19, 2010 | 11:15 AM

Disco Mike

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From: Denver, Colorado

Look on the sticker inside your engine compartment. What year is your truck? Have you already replaced the wires?

Jun 19, 2010 | 11:30 AM

cobra29

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Three Wheeling

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It's a 98 Discovery. I am replacing the plugs and wires. Right now they are gapped at .040. Rave manual stated 084-096 for Champion, I don't know if it's the same gapping for Bosch.

Jun 19, 2010 | 11:51 AM

cobra29

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Three Wheeling

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Quote:

Originally Posted by Disco Mike

Look on the sticker inside your engine compartment. What year is your truck? Have you already replaced the wires?

Dude you are smart...LOL I found the sticker and it stated 033-038 and the plugs look like they are pre-gap. Thanks for you help.

Ravi

Jun 19, 2010 | 11:00 PM

jeffrudy

Mudding

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From: somewhere in Iraq

never gap platinum plugs!!!!???

Jun 20, 2010 | 04:07 AM

antichrist

Baja

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From: Georgia, USA

Quote:

Originally Posted by cobra29

Dude you are smart...LOL I found the sticker and it stated 033-038 and the plugs look like they are pre-gap. Thanks for you help.

Ravi

I never use platinum plugs so I don't know if it applies, but if the spec is .033-.038 then .040 is too wide. It's good to be on the high end (for a hotter longer arc), but you still want to be within spec. If you get too wide though, you can get a weak spark and/or misfires.