Drivetrain spark plugs
#1
spark plugs
Out of curiosity I pulled one of the spark plugs on the Mini this morning. They look like they should be changed to me. What do you guys think? The car has 159 K on it. I don't know the maintenance that has been performed or the last time the plugs have been changed. The plugs say NGK and BMW on them with R 5 in small letters.
#2
I cannot tell from the blurry pics but look like a little carbon build up? If they have not been changed in a long time or you don't know when they were done, I would change them. I can see a little white of the insulator, but its hard to tell the milage just by looking at them.
The NGK R5 that state BMW are the factory plugs. part #
12120037608 BKR6EQUP Shared on the Cooper and Cooper S (without the JCW tuning kit)
https://www.ecstuning.com/Mini-2003-Cooper-R50-Base-Coupe-L4_1.6L_W10B16A/Engine/Ignition/
The NGK R5 that state BMW are the factory plugs. part #
12120037608 BKR6EQUP Shared on the Cooper and Cooper S (without the JCW tuning kit)
https://www.ecstuning.com/Mini-2003-Cooper-R50-Base-Coupe-L4_1.6L_W10B16A/Engine/Ignition/
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#3
#5
My R53 developed a stumble, or misfire on full throttle, high RPM pulls. Went to change the plugs, wires and coil; did the plugs first, and that cured the problem.
I use single electrode NGK iridiums. The bad ones had burned and had over a .050 gap when I took them out. They weren't even that old.
Yours look a bit worn on the end of the electrodes (burned, rounded off) , but don't know if you will notice any change in performance if you replace them....
I use single electrode NGK iridiums. The bad ones had burned and had over a .050 gap when I took them out. They weren't even that old.
Yours look a bit worn on the end of the electrodes (burned, rounded off) , but don't know if you will notice any change in performance if you replace them....
Last edited by RogueMini; 03-23-2017 at 07:00 AM.