How to change Ignition Coil ?
#21
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BigBossRadio (04-04-2014)
#23
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Just replaced my Crapions with NGK iridium's, night and day differeance between the two. Do NOT buy into "our" cars only run right with Champions....says who???? I'm running NGK iridium in my TR-6, Son's Firebird, wife's Z4 and my XJS and as of two days ago my XJ6L. The difference between the NGK's and the Champions was more of a change then the Andy's Bracket I put on. My Champions were put in 15K ago by the P.O's mechanic. In another thread I tell how I used to convince British bike owners to get the "modern" version of Champions out of their bikes by putting NEW Champions in my warmed up Bonneville and taking 3 kicks to start it and watching it have a lopey idle, then I'd shut it down and put in standard NGK B6ES's and it'd start first kick and idle smoothly. Champions of the past 10 years are nothing like Champions of the past...they are IMHO glorified fishing weights. If you want to run them and are convincied it's the only thing that runs well in "our" cars then have a blast running them just don't tell "my" car because it's convinced it runs WAY better on the NGK's. ![Wink](https://www.jaguarforums.com/forum/images/smilies/wink.gif)
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I read your piece about NKG's V Champions, So which NKG's did you use for your XJ6L?
BigBoss in Dallas
#24
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Funny you mention the Champion thing. I called a parts warehouse for plugs and they wanted the application. 96 XJ6, no problem. I asked for Champions and they wondered out loud, "why?", 'Cause it's the only plug that runs right in those cars. Turns out they don't carry Champions. Too bad for them........
So which Champion Plugs do you recommend? I currently have RC12YCC installed and need to change them out soon?
Thanks for any feedback
BigBoss in Dallas,TX
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#25
#26
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Of course, we're not comparing apples-to-apples (i'm not touting Champion plugs by any means, but do use them).
///////// From the Champion site:
4.0
Stock: Champion 71 RC12YC Nickel Spark Plug
Upgrade: Champion 9201 RC12WYPB4 Iridium/Platinum
AJ16:
Stock: Champion 344 RC9YC Nickel;
Upgrade: Champion 9001 RC10WYPB4 Iridium/Platinum
///////// According to the Engine Service Manual:
Champion RC9YCC (except North America, normally aspirated engines)
Champion RC12YCC (North America, for normally aspirated engines only)
... the 12 being a slightly hotter plug.
So the RC12YCC is a "Double Copper" plug.
/////////////////////
At the NGK site, they state this part # for non-N.A. and N.A.:
NGK BKR6EIX ... is a "Fine Wire Iridium Tipped CE" plug.
Heat range is a "6", which contrasts the Champion "12" (NGK states a "5" equates to a Champion 11,12). A "6" would equate to a Champion 9,10 heat range ... why does NGK specify the same part #? That deviates from what the *manufacturer* states.
Anyway, "Double-Copper" ≠ "Iridium"
Also, if Jag calls for a 12 heat range Champion, why wouldn't one choose a 5 for NGK?
Or how about this ... has anyone tried the Champion Iridium?
///////// From the Champion site:
4.0
Stock: Champion 71 RC12YC Nickel Spark Plug
Upgrade: Champion 9201 RC12WYPB4 Iridium/Platinum
AJ16:
Stock: Champion 344 RC9YC Nickel;
Upgrade: Champion 9001 RC10WYPB4 Iridium/Platinum
///////// According to the Engine Service Manual:
Champion RC9YCC (except North America, normally aspirated engines)
Champion RC12YCC (North America, for normally aspirated engines only)
... the 12 being a slightly hotter plug.
So the RC12YCC is a "Double Copper" plug.
/////////////////////
At the NGK site, they state this part # for non-N.A. and N.A.:
NGK BKR6EIX ... is a "Fine Wire Iridium Tipped CE" plug.
Heat range is a "6", which contrasts the Champion "12" (NGK states a "5" equates to a Champion 11,12). A "6" would equate to a Champion 9,10 heat range ... why does NGK specify the same part #? That deviates from what the *manufacturer* states.
Anyway, "Double-Copper" ≠ "Iridium"
Also, if Jag calls for a 12 heat range Champion, why wouldn't one choose a 5 for NGK?
Or how about this ... has anyone tried the Champion Iridium?
#27
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Hi Caldercay
Thanks for the Spark Plug info... I think I will stick with the Champion RC12YCC if I can source some. I'm not sure where to get them. Any ideas?
I''m also getting ready to replace the Cam Cover gasket and well seals today to deal with the oil problem in the wells. I'm attaching some pics here of the spark plug wells and the IG coil.
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BigBossRadio in Dallas, TX
Thanks for the Spark Plug info... I think I will stick with the Champion RC12YCC if I can source some. I'm not sure where to get them. Any ideas?
I''m also getting ready to replace the Cam Cover gasket and well seals today to deal with the oil problem in the wells. I'm attaching some pics here of the spark plug wells and the IG coil.
![Icon Slap2](https://www.jaguarforums.com/forum/images/smilies/icon_slap2.gif)
BigBossRadio in Dallas, TX
#28
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Could be worth a call to S N G Barratt but if they can't supply, here's an Amazon listing:
I think you can safely ignore the shipping charge shown in the listing. That would be for shipping them from US to the UK!
Graham
Last edited by GGG; 04-05-2014 at 07:55 AM.
#29
Join Date: Mar 2008
Location: Pacific Northwest USA
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I'd think any of your neighborhood parts stores should be able to get them in a day.
I will say, though, that I've been flummoxed a few times when buying spark plugs. All the big name manufacturers are positively in love with 'replace and supercede'. Original types and designations are discontinued and replaced with a alternate type. Sometimes the new designations get confusing. Well, for me, at least.
Cheers
DD
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BigBossRadio (04-05-2014)
#30
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I had read in other threads that forum sponsor S N G Barratt stock Champion RC12YCC but I can't find them listed in their catalogue.
Could be worth a call to S N G Barratt but if they can't supply, here's an Amazon listing:
Amazon.com: Champion RC12YCC Spark Plug: Industrial & Scientific
I think you can safely ignore the shipping charge shown in the listing. That would be for shipping them from US to the UK!
Graham
Could be worth a call to S N G Barratt but if they can't supply, here's an Amazon listing:
Amazon.com: Champion RC12YCC Spark Plug: Industrial & Scientific
I think you can safely ignore the shipping charge shown in the listing. That would be for shipping them from US to the UK!
Graham
They do not have the YCC plugs and haven't had them for years! I asked them to change their listing but obviously they can't be bothered or are doing it on purpose? Caveat Emptor!!
#31
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Location: Pacific Northwest USA
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#32
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DON"T buy those plugs from Amazon. I tried that supplier and they will send you RC12YC plugs at twice the price (+ shipping!!) I can buy them locally and then tell you that there is no difference between YC and YCC plugs
They do not have the YCC plugs and haven't had them for years! I asked them to change their listing but obviously they can't be bothered or are doing it on purpose? Caveat Emptor!!
They do not have the YCC plugs and haven't had them for years! I asked them to change their listing but obviously they can't be bothered or are doing it on purpose? Caveat Emptor!!
So could I use RC12YC plugs instead of RC12YCC ? I can get the RC12YC locally at the Home Depot, they have them in stock?
Thanks again
BigBoss in Dallas, TX
#33
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As far as who doesn't like Champions and who does. My experience at the dealer led me to my conclusions. I saw some cars come in with ignition problems and the first thing we checked was the plugs. This doesn't mean that all other plugs are inferior. It simply means that some cars that came back to the dealer for service did have misfires caused by non stock plugs. As a dealer, our first part of fixing a problem is removing the variables. The cars we never saw back at the dealer could have run fine with other plugs in them. I don't know.
#34
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The nickel alloy center and ground electrode provide good wear characteristics and the extrusion of copper into the center electrode allows for an increase in conductivity and heat control.
Last edited by Suede; 04-05-2014 at 06:54 PM.
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BigBossRadio (04-06-2014)
#35
#37
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BigBossRadio (04-07-2014)
#38
#39
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FWIW ...
(X300) L6-4.0L (AJ16) (1996)
Spark Plug: Technical Service Bulletins
Spark Plugs - Change to Hotter Plugs 05.1-07 Sedan Range
DATE 2/95
Amended 12/98
MODEL 1995-97 MY
Sedan (4.0L) Range VIN 720001-812255 Spark Plugs - AJ16 Engine -
Change in Specification ISSUE:
* The spark plug specification is updated on all AJ16 (4.0L) Sedan Range vehicles to include supercharged engines. Hotter spark plugs (part number EBC 8143) were installed on supercharged engines in production from 1997 MY.
* ACTION: Use the following spark plugs as service replacements in all AJ16 engines: ENGINE PART NUMBER PLUG GAP TORQUE AJ16 (4.0L) EBC 8143 0.9 mm (0.035 in) 22-28 Nm (17-20 lb ft)
MotorcarsLtd has 'em:
Jaguar Xj6 1996 Engine Electrical Spark Plug
SKU EBC8143 (RC12YCC)
Weight 0.50 lbs
Market price: $7.25
Our price: $3.44
SKU FR7DCX (Bosch)
Weight 0.50 lbs
Market price: $2.47
Our price: $1.91
SKU RC12PYP (Champion)
Weight 0.50 lbs
Our price: $6.76
(X300) L6-4.0L (AJ16) (1996)
Spark Plug: Technical Service Bulletins
Spark Plugs - Change to Hotter Plugs 05.1-07 Sedan Range
DATE 2/95
Amended 12/98
MODEL 1995-97 MY
Sedan (4.0L) Range VIN 720001-812255 Spark Plugs - AJ16 Engine -
Change in Specification ISSUE:
* The spark plug specification is updated on all AJ16 (4.0L) Sedan Range vehicles to include supercharged engines. Hotter spark plugs (part number EBC 8143) were installed on supercharged engines in production from 1997 MY.
* ACTION: Use the following spark plugs as service replacements in all AJ16 engines: ENGINE PART NUMBER PLUG GAP TORQUE AJ16 (4.0L) EBC 8143 0.9 mm (0.035 in) 22-28 Nm (17-20 lb ft)
MotorcarsLtd has 'em:
Jaguar Xj6 1996 Engine Electrical Spark Plug
SKU EBC8143 (RC12YCC)
Weight 0.50 lbs
Market price: $7.25
Our price: $3.44
SKU FR7DCX (Bosch)
Weight 0.50 lbs
Market price: $2.47
Our price: $1.91
SKU RC12PYP (Champion)
Weight 0.50 lbs
Our price: $6.76
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BigBossRadio (04-08-2014)
#40
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You guys are running around grabbing "lawn mower" plugs for your X300's??? That's priceless!!!! Sorry not trying to make fun but seriously?? As they say you can lead a horse to water.....but, well you know the rest. My NGK's have performed S-W-E-E-T all week, no more stumbles or stalls and pick up is well improved over the Champions...in all seriousness I hope you guy's find happiness, If I was independently wealthy I'd send you a new set of NGK iridium's to you just to put in for a week behind the new Champs so you could "feel" the difference. Cheers!
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