The manual for my 2002 XJR lists the NGK PFR5G-11E as the spark plug for my car. Since it lists only that one -- I am assuming that is what they installed at the factory and if they go by the book ...do at the dealer.


When I go out to my favorite sites -- I am getting a lot of other NGK plugs listed as the correct one -- non being the one listed in the manual

When I look for the 11E -- I have trouble finding the "E". I have not spent a lot of time on this -- But ...... anybody know what the "E" stands for?


Over the years I have had issues with installing different plugs -- especially newer more sophisticated plugs into older vehicles -- I stick with the factory plugs!

 

I just edited this and need to ask your forgiveness about this reply. Please ignore. I thought you were discussing the BKR series. The Iridium provides better spark with a more efficient transfer of energy because of conductivity VS platinum.

<<<Mathew>>>

 

Double Platinum ?

BTW -
I have a full set (8 pcs) genuine Jaguar spark plugs NCA 3850HA 2 / NGK PFR6G-13E for sale for 60$ shipped.
I bought this set for my XJ8 NA but as I found out afterwards they are for the SC cars only.
If anyone is interested - I will be in the US from the 9th of April and I can bring them with me and post them over there...

David

 

DavidN: Can u ship the plugs to Sweden? In that case, im interested.

Are they genuine NGK? Brand new?

Kind regards, Kimmo/Sweden.

 

Kimmo,

sure thing!
Sparks are genuine Jaguar parts, made by NGK.
NIB (new in box), will PM you a picture.

David

 

I put in some NGK G-power (platinum) plugs when I did the secondary tensioners. They work great.

 

For whatever reason Jaguar made a plug change in the later V8's.

Same plug for both V8 engines -- they moved to a 5G. Most of the sites list different plugs. But the 5 is a hotter plug than a six -- and the moved to a smaller gap from the 13 to an 11.

I have not been able to find out the significance of the "E" at the end of the plug number.

 

Details about the NGK PFR5G-11E spark plug seem to be a closely guarded secret. A local auto parts dealer talked me into replacing my OEM factory NGK plugs with Bosch iridium plugs. After I installed them, my car ('97 XK8) ran just fine but my radio doesn't like them, as FM reception is now full of static. The parts dealer agreed to take them back and exchange them, but now I am leery of installing any other plug except OEM (the parts place lists 21 possible replacements). I am thinking the "E" on the end of the part number may refer to EMF, or electrical, meaning they are resistor types designed to reduce radio static....but I'm not sure of that either. Still looking online to see if there is some site that gives more details about the plug. The OEM ones are very expensive, $14 and up in the U.S., and much more in Europe and UK.

 

E appears to stand for 'special resistance' according to one website I looked at....

http://ngk-sparkplugs.com/pfr5g11e-p-2898.html

 

I can't recall exact model (I can find though) but I replaced my sparks with NGK iridium and works great.

 

I ordered NGK PRF5G-13E plugs online. The only difference from the PRF5G-11E is a 0.2mm larger spark gap. This is also the plug called for by my NAPA dealer. If they don't seem to work right I will just close the gap to 0.11mm.

Here's a link to the NGK site which decodes the information in the part number:

[NGK-Platinum-PFR5G-11E] - - It's Free! : NGK Spark Plugs Store!, NGK Spark Plugs We Sale, Spark Plug For Racing car, Automobile, Motorcycles, ATVS, Scooters, Marine Engine, Agricultural Equipment