sneakyneon

Trying to solve a spark plug issue, If someone has a head off could you check and see what plug was in it, and how far in the hole it sits. a few pics would be great.

suicidal4life

There might be some pics in one of these threads. I don't feel like digging thru them right now.

https://mbworld.org/forums/w211-amg/...stock-awe.html

https://mbworld.org/forums/w211-amg/...s-project.html

https://mbworld.org/forums/w211-amg/...s-project.html

TVT_DESIGN

The ones we have pulled are Densos. What are you trying to figure out?

komp55

Here's the correct plug. I posted these in your other thread, too:

TexasSteele

We want to see how deep the OEM plug reaches into the cylinder...

So a pic of a head with a plug screwed in would be choice.

TVT_DESIGN

Gotcha, I've got a few sets of heads sitting around at the shop. If I have time I'll throw a plug in and snap a pic.

TexasSteele

Awesome.

Whats a spare set of heads bring? Any available for sale? I'll probably just look for another complete parts car as low as prices are getting

sneakyneon

That is amazing, Thank you, this will really solve a scooby doo mystery. So the factory uses a 1 inch reach plug, every major manufacture says 3/4 reach. So either the plug sticks a 1/4 inch to far in the head or a 1/4 inch in the hole. we will see tomorrow.

TexasSteele

https://mbworld.org/forums/attachmen...pgrade-441.jpg

Tough to see, but visible...looks like we need a 7/8" reach..

komp55

Why all the drama over the extension of the plug into the cylinder head? Just use the correct plug (pictured above) and all is as the engineers at MB specified. There's no mystery here to be solved.

sick430

same question here, what would a set of 55N/A complete heads run me??? thanks

TexasSteele

My replacement dealer spec plugs were about 1/4" shorter...sneakyneon pointed out that threads can create hotspots, etc...and I'd like to make sure I'm running the right setup.

prodigymb

lol i dunno man. i posted in his other thread the same info you posted in this thread .....it doesn't get any easier then that, there is no mystery.

sneakyneon

Um drama? If you don't want to contribute to the thread why waste your energy and out time? 4 major spark plug companys show 3/4 reach plugs as a replacment,wile MB says 1.06. whats it going to hurt to see a pic of a plug in head? I have a 3/4 reach plug in the car now and it runs fine, if it was recessed 1/4 into the sparkplug hole the car would misfire and run poorly, If a 1.06 plug sticks into the combustion chamber it will cause detonation and carbon build up on the threads.

komp55

Who gives a flip about a picture of the tip of a spark plug portruding into a head's combustion chamber? I've already contributed more useful information to this thread than should have been necessary.

If you look at the correct technical information at the various spark plug manufacturers' websites, they all give the same results and show the proper thread length at approximately 25.6 mm, or just over an inch.

I and others have tried to help you by providing you with the correct part number information (and even some pictures of the factory plug, too) since you apparently went to the parts store without knowing what to purchase.

Let's recap the most frequently used correct plug choices:

Factory installed: MB part no. 004 159 13 03 (NGK ILFR6A [Stock #3588])

Bosch: FR6MPP332

Denso: IKH20 [Stock #5344]

Beru and Champion also show applications, but I'd stick with one of the choices above, and probably in the order listed.

sneakyneon

Do you have a head off an w211 E55? NO? then dont respond, I found a member that does.Yes I get it, that deep seated need to respond to every post to have the only right answear. To many members on this forum need to bash the next guy. Give it a rest.