What are the best sparkplugs for the E55
02-23-2009, 11:20 PM
#1
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2004 E55
What are the best sparkplugs for the E55
just like the title says. Wondering what the high horsepower cars are using? I ve seen LET selling iridiums but the factory plugs are platinum i think? Any thoughts?
02-23-2009, 11:27 PM
#2
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I don't have a high horsepower car, yet, but I am upgrading my plugs.
I ordered NGK Iridium IX plugs (BKR6EIX-11). I've never had a single problem with NGK plugs so I figured it was a safe bet. And considering that they're cheaper than stock replacement plugs, it was pretty much a no-brainer.
I ordered NGK Iridium IX plugs (BKR6EIX-11). I've never had a single problem with NGK plugs so I figured it was a safe bet. And considering that they're cheaper than stock replacement plugs, it was pretty much a no-brainer.
Last edited by bobgodd; 02-24-2009 at 07:17 PM.
02-24-2009, 03:21 AM
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02-24-2009, 06:48 AM
#5
What's very strange about all of this is that the E55 comes from the factory with NGK ILFR6A's installed, and these are also what are packaged as the factory part number of A0041591303. Yet if you go the the NGK website, it shows the IFR5D-10 as the correct application for use as a replacement plug, even though you can also find the ILFR6A listed on the site for other MB applications.
Anyone know what the difference is between the two plugs (other than heat range), and why the NGK site recommends a hotter temperature range plug than what came in the car?
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02-24-2009, 10:51 AM
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02-24-2009, 12:36 PM
#9
Mystery solved.
The official USA website for NGK is ngksparkplugs.com, not ngk.com (which is actually a company called "sparkplugs.com", an apparent site squatter and where I first looked). Both sites noted above, however, show the IFR5D10 as the "E55" spark plug, but if you look closely at the real NGK site, it lists the engine for the E55 as the "113.980". That, of course, is wrong. Our cars have the 113.990 variant of the engine.
Now if you go to the German website for NGK, http://www.ngkntk.de, you do get the correct spark plug for our cars, the ILFR6A, which is the plug the car had installed by the factory. I've attached the screen shot from the German website showing this. As a final note, according the fake NGK site noted above, the higher the number, the colder the plug's heat range. So the next step colder for the 113.990 engine would be a "7" heat range plug. I have no idea if such a plug is available.
The official USA website for NGK is ngksparkplugs.com, not ngk.com (which is actually a company called "sparkplugs.com", an apparent site squatter and where I first looked). Both sites noted above, however, show the IFR5D10 as the "E55" spark plug, but if you look closely at the real NGK site, it lists the engine for the E55 as the "113.980". That, of course, is wrong. Our cars have the 113.990 variant of the engine.
Now if you go to the German website for NGK, http://www.ngkntk.de, you do get the correct spark plug for our cars, the ILFR6A, which is the plug the car had installed by the factory. I've attached the screen shot from the German website showing this. As a final note, according the fake NGK site noted above, the higher the number, the colder the plug's heat range. So the next step colder for the 113.990 engine would be a "7" heat range plug. I have no idea if such a plug is available.
Last edited by komp55; 02-19-2013 at 04:36 PM.
02-24-2009, 12:36 PM
#10
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See now I'm all confused. I thought our cars came with Bosch plugs as stock hardware. I know that different manufacturer heat ranges don't quite transfer over evenly, so when I went to explore plug options I guess I just assumed that if NGK list a 5 plug as being the correct plug for our application then the stock plug would be the same. I too am curious why they would recommend a hotter plug than stock...
02-24-2009, 12:41 PM
#11
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Mystery solved.
The official USA website for NGK is ngksparkplugs.com, not ngk.com (which is actually a company called "sparkplugs.com", an apparent site squatter and where I first looked). Both sites noted above, however, show the IFR5D10 as the "E55" spark plug, but if you look closely at the real NGK site, it lists the engine for the E55 as the "113.980". That, of course, is wrong. Our cars have the 113.990 variant of the engine.
Now if you go to the German website for NGK, http://www.ngkntk.de, you do get the correct spark plug for our cars, the ILFR6A, which is the plug the car had installed by the factory. I've attached the screen shot from the German website showing this. As a final note, according the fake NGK site noted above, the higher the number, the colder the plug's heat range. So the next step colder for the 113.990 engine would be a "7" heat range plug. I have no idea such a plug is available.
The official USA website for NGK is ngksparkplugs.com, not ngk.com (which is actually a company called "sparkplugs.com", an apparent site squatter and where I first looked). Both sites noted above, however, show the IFR5D10 as the "E55" spark plug, but if you look closely at the real NGK site, it lists the engine for the E55 as the "113.980". That, of course, is wrong. Our cars have the 113.990 variant of the engine.
Now if you go to the German website for NGK, http://www.ngkntk.de, you do get the correct spark plug for our cars, the ILFR6A, which is the plug the car had installed by the factory. I've attached the screen shot from the German website showing this. As a final note, according the fake NGK site noted above, the higher the number, the colder the plug's heat range. So the next step colder for the 113.990 engine would be a "7" heat range plug. I have no idea such a plug is available.
02-24-2009, 12:44 PM
#13
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See now I'm all confused. I thought our cars came with Bosch plugs as stock hardware. I know that different manufacturer heat ranges don't quite transfer over evenly, so when I went to explore plug options I guess I just assumed that if NGK list a 5 plug as being the correct plug for our application then the stock plug would be the same. I too am curious why they would recommend a hotter plug than stock...
02-24-2009, 12:53 PM
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Wow that really sucks. Well I'm glad I didn't bite on their info and I at least got the stock equivalent - by total mistake of course. I would have gone to heat range 7 had I known though!
02-24-2009, 01:14 PM
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02-24-2009, 04:07 PM
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02-24-2009, 07:19 PM
#19
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I edited my original post. The plugs that I originally ordered were incorrect, and now I have another two days of down time on my busted *** car.
02-24-2009, 07:34 PM
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E-ZGO 53hp., 1999 E 430 sport, 2004 E 55, 2008 Tahoe LTZ on 24"s
Cold plug = Good insurance against pre-ignition.
pre-ignition = $XX,XXX.XX
So worth a 2 day wait, don't forget the added benefit of the sticker too.
pre-ignition = $XX,XXX.XX
So worth a 2 day wait, don't forget the added benefit of the sticker too.
02-24-2009, 07:50 PM
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I just hate having to bug my roommates if I want to go anywhere lol.
02-24-2009, 09:53 PM
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E-ZGO 53hp., 1999 E 430 sport, 2004 E 55, 2008 Tahoe LTZ on 24"s
