Spark Plugs?
#1
Spark Plugs?
It's almost time for a new set of spark plugs. Anyone change theirs yet? With what? I suppose I'll go with what the manual says (don't have it with me). Any thoughts that indexing may help MPG? I indexed my plugs on my V12, and it actually was noticable.
Just wondering how easy/hard it was on the HCH I. Wires too?
Thanks for any input.
Just wondering how easy/hard it was on the HCH I. Wires too?
Thanks for any input.
#2
Re: Spark Plugs?
I've heard the plugs are numbered according to how the hole in the head was threaded...to allow the gap to face a certain direction.
If this is true remember you can't put the plug from Cyl 2 into Cyl 4 etc. (Unless those two cylinders had the same number stamped onto them)
If this is true remember you can't put the plug from Cyl 2 into Cyl 4 etc. (Unless those two cylinders had the same number stamped onto them)
#4
Re: Spark Plugs?
'94 Jaguar XJ12, 6.0 L V12. Gets considerably less MPG than the HCH ; )
I checked prices on the OEM spark plugs (NKG IFR5G-11K, and Denso SK16PR-L11).
They are VERY pricey! I wasn't expecting to pay ~$13 per plug!!! Wow.
I checked prices on the OEM spark plugs (NKG IFR5G-11K, and Denso SK16PR-L11).
They are VERY pricey! I wasn't expecting to pay ~$13 per plug!!! Wow.
#5
Re: Spark Plugs?
I replaced my plugs not long ago. 2003 HCH that I got used. Didn’t do anything special, just replaced them. Got AC Delco equivalent to the recommended plugs from NAPA. They were a little pricy (about $8 each) but not $13! They looked the same (tapered center electrode, etc.) Didn’t loose any performance . . . may even have gained some FE, but I don’t know how old the other plugs were (I assume they were pretty old, car had close to 100,000 at the time) and how much that affected things.
kernk
kernk
#7
Re: Spark Plugs?
Originally Posted by cbxtc6
No one mentioned there's EIGHT spark plugs on this engine (dual-plug heads).
Anyone know how to remove the 'snorkel' thingie that covers the front 4 plugs?
Anyone know how to remove the 'snorkel' thingie that covers the front 4 plugs?
You will need a very long extension for your socket wrench (I put two extensions together to make a long enough one), because the plugs are WAY down in there! If you don’t have a rubber gripper in your plug socket you will never get the things out . . .
#10
Re: Spark Plugs?
Originally Posted by cbxtc6
Not the coil 'thingies', but the air intake thingie.
I hope I am being of some help . . .