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Spark Plug Comparison

 
Old 12-15-2011, 04:23 AM
  #26  
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E55
Originally Posted by MrKool View Post
I just ordered the spark plugs (ILFR6A) from amazon. Total was $154.80 delivered to my door. I will be replacing them this weekend. Don't expect it to take more than a couple of hours. I called the stealership just to get an estimate and was quoted below.

Parts: $292.00
Labor: $520.00

Total: $812.00

Not only that, I also ordered the supercharger and the v-belt from primeparts. Cost me total of $88.00 delivered. Dealer quoted $314.00 total.

So if I went with the dealer, the total cost would've been $1126.00. BIG Thanks to mbworld AND the folks that have posted the DIYs, it'll only cost me $242.80 and a few hours on Saturday.
What else other then then the plugs does that cost include? Did you change your plug wires too? Need to do mine as well. Thanks
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Old 12-15-2011, 08:51 AM
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Originally Posted by Max.H View Post
What else other then then the plugs does that cost include? Did you change your plug wires too? Need to do mine as well. Thanks
just the plugs. People have difference of opinion on wires, but I am not changing mine since they should last a lot longer than the plugs themselves (unless handled incorrectly and not using proper tools) and the manual does not call for them to be changed either.
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Old 12-15-2011, 10:05 AM
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G350 Bluetec
Plug wires

Originally Posted by MrKool View Post
just the plugs. People have difference of opinion on wires, but I am not changing mine since they should last a lot longer than the plugs themselves (unless handled incorrectly and not using proper tools) and the manual does not call for them to be changed either.
What we did was unplug the wires from the coil pack and then replug them. This wipes any corrosion buildup on the connection.

No doubt many stealers replace "defective"plug wires rather than performing this venerable procedure.

We used a dab of anti seize on the plug threads and a dab of dielectric grease on the boot wire to plug connection.

Finally, after all this, if you get a misfire try switching spark packs from one cylinder to another. Be careful because the wires and packs have an interchangeability order, they are not all the same. I took a before picture of both banks as well as looking at the diagram on
www.mymercedesparts.com
For a further reference to the M113K engine.
Just some tips. Comment: The spark packs on the m113 and m113k v8 are epoxy sealed and should be quite rugged vs the infamous v12 packs in the turbo environment.
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Old 12-15-2011, 12:14 PM
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Originally Posted by grane View Post
What we did was unplug the wires from the coil pack and then replug them. This wipes any corrosion buildup on the connection.

No doubt many stealers replace "defective"plug wires rather than performing this venerable procedure.

We used a dab of anti seize on the plug threads and a dab of dielectric grease on the boot wire to plug connection.

Finally, after all this, if you get a misfire try switching spark packs from one cylinder to another. Be careful because the wires and packs have an interchangeability order, they are not all the same. I took a before picture of both banks as well as looking at the diagram on
www.mymercedesparts.com
For a further reference to the M113K engine.
Just some tips. Comment: The spark packs on the m113 and m113k v8 are epoxy sealed and should be quite rugged vs the infamous v12 packs in the turbo environment.
Great. Excellent suggestions. Thanks.
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Old 10-28-2012, 01:59 PM
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one car at a time
FYI - The manual (page 481) says the proper gap is 0.031" (0.8mm) for the e55.
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Old 10-28-2012, 03:34 PM
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That's for stock. If your running a lot of mods and more boost you should tighten the gap slightly. I was running .027.
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Old 11-16-2012, 11:48 PM
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e46 m3, w211 e55
Sorry if this is a newb question... but what is the technical advantage of running the colder plugs?

My car is stock w exception of EC tune.

Thanks
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Old 11-17-2012, 10:51 AM
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65 Chevelle Wagon w/ C5 frame, 08 ML63, 04 S600, 04 E55,(sold) 00 ML55,(sold) 98 C43-55K Swap
Originally Posted by gazosnic View Post
Sorry if this is a newb question... but what is the technical advantage of running the colder plugs?

My car is stock w exception of EC tune.

Thanks
Less detonation prone with colder plugs at higher boost levels. I'm sure your fine with stock plugs on a tune only.
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Old 11-17-2012, 10:56 AM
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e46 m3, w211 e55
cool...thanks... I may add SC pulley in the spring (Would like to break into 11's ... that will probably be all i do performance wise.
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Old 11-17-2012, 12:24 PM
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e46 m3, w211 e55
Ok another dumb question... just to confirm are there a total of 8 to buy?
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Old 11-17-2012, 12:28 PM
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E55 w/ goods, Z32 Project underway
Originally Posted by gazosnic View Post
Ok another dumb question... just to confirm are there a total of 8 to buy?
16 total
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Old 11-17-2012, 12:30 PM
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2006 e55, 2005 S55
you need 16 ! 2 per cylinder
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Old 11-19-2012, 10:36 AM
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e46 m3, w211 e55
Here is what mine looks like... I assume a good candidate for replacement.

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Old 11-19-2012, 10:43 AM
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one car at a time
^^ Are you logging your AFRs ? My guess is you are running rich....
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Old 11-19-2012, 10:45 AM
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2005 E55 AMG
Originally Posted by gazosnic View Post
Here is what mine looks like... I assume a good candidate for replacement.

[IMG]http://i193.photobucket.com/albums/z9/nickgazos/4CEFF890-8252-4DEC-907B-39E65D76251B-1669-000000EF0D4CEF0A.jpg[/IMG
it doesn't look horrible -pretty normal for the mileage, but yes, replace them

here's a good pictorial of what happens to plugs
http://www.ngksparkplugs.com/tech_su...qs/faqread.asp
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Old 11-19-2012, 12:21 PM
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e46 m3, w211 e55
Originally Posted by cij911 View Post
^^ Are you logging your AFRs ? My guess is you are running rich....
Im not logging them. I have EC tune... does that make it run more rich? Any recommendations on how to log AFRs?
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Old 11-19-2012, 02:00 PM
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one car at a time
Originally Posted by gazosnic View Post
Im not logging them. I have EC tune... does that make it run more rich? Any recommendations on how to log AFRs?
You should get a wideband installed (Zeitronix and Innovate are the leaders) or find someone with a portable wideband and drive around and log....I am sure you'll see the box tune is very conservative (rich). Although the plugs don't look bad, they do look like you are running a tad rich (I have seen much worse).
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Old 09-29-2017, 06:58 PM
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2006 CLS55
Originally Posted by 06E55 View Post
Can anyone verify the correct spark plug gap? or does it vary by spark plug brand?
Originally Posted by 06E55 View Post
Does the gap vary by the type of plug used? If you go to NGK's website, it says the gap is 0.039 for a 2006 E55... I always thought it was 0.032????
Originally Posted by tcoleman View Post
I have my manual in front of me (2003 E55) and it calls for .039 gap. Hope this helps.
Originally Posted by cij911 View Post
FYI - The manual (page 481) says the proper gap is 0.031" (0.8mm) for the e55.
2006 cls55 manual says .031" or 0.8mm

2006 cls500 manual says .039"

hope this helps clarify
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Old 10-21-2018, 12:29 PM
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2005 E55
Regarding gaps, my 2005 E55 manual says 0.031" or 0.8 mm.

Based on my small sample of NGKs, I recommend checking the gaps on new plugs rather than assuming they are all accurately set at a predetermined gap. I just bought and gapped 18 of the NGK LFR6AIX-11 plugs. Yes, it's a small sample, but the gaps were definitely not consistent across the batch. Three of the 18 were at the gap I was setting (I used 0.032), and the rest were closer to 0.040.
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Old 05-25-2019, 04:31 PM
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Old 05-26-2019, 01:46 AM
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My car is currently stock. Is there a difference in the smooth idle with a one stage colder plug? If so I'll go stock plugs until I modify.
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Old 05-26-2019, 06:31 AM
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CLS55
Stay on stock plugs until you mod going one step colder will be more trouble than worth imo
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Old 05-26-2019, 11:08 AM
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Originally Posted by PieRat View Post
Stay on stock plugs until you mod going one step colder will be more trouble than worth imo
How so??? Going 1 step colder really shouldnt make much of a difference in all reality. Should idle the same cruise the same an run hard just it keeps detonation more at bay. They dont stay as clean as the stock but its cus their not burning off the deposits as fast as the hotter plug. But i change my plugs every 4 monthes anyway just because its nice to have a fresh set in there and in reality their not that expensive ... its like doing an oil change and takes bout an hr.

But maybe some of our cars dont like the colder plugs mine loves em and it drives, idles, and cruises exactly like it did with the stockers heck even my mileage is same.
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Old 05-26-2019, 07:16 PM
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CLS55
My daily commute is like 1.5 miles (5min in traffick) from home to work and back. I don't really get all the way up to op temp and I think this contributes to my plugs fouling a little. The idle for me really smooths up when I've been beating on it, until then its a bit rough. It could be my injectors though? I am putting a new set of 1 step colders in. I have one bank done last night the other bank today and I'll let you guys know if its smoother from the change. Everything else, MAP, IAT, o2, coil packs and wires are all replaced within the last couple of years. My thought is if you are on stock you will have problems with plugs fouling up and slightly rougher idle. NGK recommend going to one sop colder when increasing power by 75-150 hp if I remember correctly.

You must be fast to get all 16 plugs done in an hour! I spent a good hour getting one side done, but I didn't copper grease the plugs last time so I have to turn it like 7 times before it starts loosening up and turning easily :P. Also I don't have a good extension length and have to work around with too short and too long .
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Old 05-26-2019, 07:48 PM
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CLS55
I find my idle is more temperamental with the colder plugs I think it is because my daily commute to work is like 2.5km and car barely reaches OP temp. I do my best to smash the pedal on longer drives but I think the plugs foul up quicker, figure since hes stock no point changing to get potential headaches for no real benefit ngk said every 75-150hp go one step colder if I remember.


Maybe my idle is the injectors we will see I have new plugs going in now did one bank last night do the other bank tonight.

You must be fast to get them done in an hour, I have to struggle against the plug for like 7 full rotations before it starts easing up on me. Probably should put some copper Q1qQQwzQqqqqqwww²grea222w3w33a2qq in grease on. I also am a bit short on appropriate extensions and either have too short or long so am working around that lol
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