Spark Plug Type ?
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Junior Member
Joined: Jul 2018
Posts: 6
Spark Plug Type ?
I have an '03 Grand Marquis with 59,000 miles. I would like to change the plugs. I'm leaning towards Autolite XP104 Iridium. I would appreciate any advice on that plug vs the original Motorcraft plug. Thanks for any help.
Senior Member
Joined: Feb 2017
Posts: 619
From: Phoenix, AZ., USA
Spark Plugs
The correct spark plug for your '03 Marquis is the BOSCH Double-Iridium -- Bosch part # 9606
DO NOT use any type of anti-seize compound -- lube the plug's threads with synthetic motor oil ONLY !!
Use a torque wrench to install -- at 12 ft/lbs = 145 inch/lbs.
Best price for these plugs is at RockAuto.com.
DO NOT use any type of anti-seize compound -- lube the plug's threads with synthetic motor oil ONLY !!
Use a torque wrench to install -- at 12 ft/lbs = 145 inch/lbs.
Best price for these plugs is at RockAuto.com.
Last edited by 95 MERC; Aug 7, 2018 at 11:41 AM. Reason: Add content
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