Reddit Reddit reviews Champion RC12LYC (412) Copper Plus Replacement Spark Plug, (Pack of 1)

We found 1 Reddit comments about Champion RC12LYC (412) Copper Plus Replacement Spark Plug, (Pack of 1). Here are the top ones, ranked by their Reddit score.

Automotive
Replacement Parts
Automotive Replacement Ignition Parts
Automotive Replacement Spark Plugs & Wires
Automotive Replacement Spark Plugs
Champion RC12LYC (412) Copper Plus Replacement Spark Plug, (Pack of 1)
Copper Core Center Electrode: Allows for accurate control of heat range for longer lifeMaximum Corrosion Resistance: Thanks to a Patented Ultraseal coated shellDependable and Durable: Built to ISO and SAE standards for proven performanceMaximum EMI & RFI Suppression: Patented SAC-9 semi-conductor resistor for ultimate suppressionCompatible with the Following Applications: Automotive, Small Engine, Marine
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1 Reddit comment about Champion RC12LYC (412) Copper Plus Replacement Spark Plug, (Pack of 1):

u/Timbo1986 ยท 3 pointsr/GrandCherokee

Clean looking ZJ! Congrats!

Do you know any of the maintenance history? If not, I would suggest changing all fluids and doing a tune up before doing any upgrades/mods.


Fluids

  • The 4.0 seems to love Shell Rotella 10W30 - either T (Conventional) or T6 (synthetic) its up to you and use a quality filter - Wix, NAPA Gold, Mopar, or Motorcraft FL-1A
  • Drop transmission pan and change fluid and filter - ATF +4 only No additives or anything else. Adjust the bands and TV cable (link below for TV adj.)
  • Drain and fill the transfer case - Selec-Trac transfer case (NP242) and Command-Trac (NP231) get ATF +4 also. Quardra-drive (NP249) gets a special Mopar fluid
  • Drain and fill both differentials - if you tow 75W140 full synthetic in rear 75W90 in front, otherwise 75W90 in both
  • Drain and fill coolant. Zerex-G05 is now the OEM coolant, but you'll be fine with the old school green fluid. Also a good time to look over the condition of the rest of your cooling system. If you're running below 210 you're going to want to put a 195 thermostat in - running to cold causes tons of problems
  • Siphon out your power steering fluid - either through the high pressure hose, or with a turkey baister. Use only Chrysler approved fluid not ATF. You'll need to burp the system after by turning your wheels lock to lock several times and topping of the fluid
  • Bleed your brakes! These brake lines are prone to rust already, and brake fluid absorbs water from the atmosphere over time and they will rust from the inside out. spray the bleeder screws with PB Blaster a couple times a day for a few days before you get started to free them up - Check your pads, shoes, drums, and rotors too!


    Tune Up - This is what I'm currently running in my 4.0

  • Champion copper spark plugs


  • Denso wires


  • Accel distributor cap with brass contacts


  • Accel Brass rotor


  • Accel Ignition coil


  • Bosch air filter any paper filter is fine though


  • gates belt


  • Clean the throttle body and IAC


  • Adjust the Transmission Throttle Valve Makes a big differnce in shifting


  • Clean the Grounds - #1 in the "Dirty Dozen" list below



    If you do all that, and you have any issues with stalling or hesitation from the engine, This should be your bible - The Dirt Dozen

    Your ZJ will be running like a top, and ready to lift, modify and most importantly be reliable when you get out there to wheel!