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CL-Class (W215) 2000-2006: CL 500, CL 600

SeaFoam carbon cleanup

 
Old 03-12-2018, 02:35 PM
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820HP kleemann & homecooked CL V12 Bi-Turbo
Exclamation SeaFoam carbon cleanup

Basically, I am not a miracle product believer
but today I tried out SeaFoam
the engine runs like hell after using this, cleaning most carbon and also cleaning your spark plugs
it seems that carbon deposit in the cylinders also makes your ignition worse

so it is easy to do
this is a 12 cylinder, so 4x bigger as a 4 cyl,
get 2 cans of SeaFoam
engine HOT
1500-2000 rpm
connect your seafoam here


just hold the hose close enough to suck up the seafoam and that then engine doesn't stop
around 75% of the bottle, the exhaust while smoke a lot, some smoke in the engine too, don't worry
more smoke, better is
Stop the engine quickly, wait 15-20 minutes
run the engine until nearly no smoke anymore
repeat this 3 times
then drive your car hard up to 5000-6000 rpm
you don't need to drive fast, use the manual gear selection

you will be surprised how your engine runs like new

this might also solve some low ignition faults


to clean injectors, drop a can of seafoam in your gastank
see manual for how much
(I prefer manual cleaning)

They say you can use this in oil too but that scares me on a bi-turbo V12


product is just amazing
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Old 03-14-2018, 06:45 AM
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820HP kleemann & homecooked CL V12 Bi-Turbo
very interesting discovery

This morning I started up and didn't wait for engine warmup
drove quite fast, not crazy

engine light went on

and wow, for the first time I had a Xentry Das message targeting the spark plugs
allways had missfire messages only

conclusion, now that the cylinders are cleaned up, Xentry Das can identify the problem more accurately
So, after all these long testings with repaired, professionally repaired and now new coil packs, if you have misfire problem

before you replace your coil pack as even if you replaced your sparkplugs first, drive only a 500 miles with ignition problems, can mess up your spark plugs

do this first:

1) clean up your injectors. seafoam or other product in gas
2) seafoam your cylinders x3 (2 cans) as above
3) replace your spark plugs
4) verify the the red isolators are dirty or bad / replace them



then connect Xentry Das and look
this way you might avoid paying for new coilpacks

remember, if the whole left or the whole right if bad, then you might have a Ignition voltage transformer problem.

you can check this easily by opening the device
mostly, nothing burned inside, no dark silicone, device is good

here the Xentry message I got before replacing spark plugs 11 A and B


hope this helps some of you
don't forget the thx button
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Old 03-14-2018, 02:58 PM
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Mercedes
have you now changed the insulators and plugs and confirmed the misfires are gone ?

Btw the plug gap should be 0.8 and not 0.7 as previously thought.

Last edited by tusabes; 03-14-2018 at 03:04 PM.
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Old 03-14-2018, 03:08 PM
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820HP kleemann & homecooked CL V12 Bi-Turbo
Originally Posted by tusabes View Post
have you now changed the insulators and plugs and confirmed the misfires are gone ?

Btw the plug gap should be 0.8 and not 0.7 as previously thought.
nopeI ordered spark plugs on amazon
they should be here in 24h
I'll replace and confirm here same day don't worry
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Old 03-14-2018, 03:34 PM
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Originally Posted by tusabes View Post

Btw the plug gap should be 0.8 and not 0.7 as previously thought.
really ? where does that info come from
I didn't check in EPC but found that probably same place
I have all sparks set to 0.7
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Old 03-14-2018, 06:30 PM
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Mercedes
See post 12 here linking the updated Mercedes spec
https://mbworld.org/forums/s-class-w220/637435-s600-left-coil-dead-limp-mode.html
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Old 03-14-2018, 07:44 PM
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Thumbs up

Originally Posted by tusabes View Post
See post 12 here linking the updated Mercedes spec
https://mbworld.org/forums/s-class-w...limp-mode.html
thanks, great info

at least I have a -0.1 gap
larger is more problematic

but I will set all to 0.8
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Old 03-14-2018, 10:21 PM
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couple of Benzos
you should never use 2 cans of seafoam on a car and def never ever do it 3 times
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Old 03-14-2018, 11:31 PM
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Originally Posted by AndreNY View Post
you should never use 2 cans of seafoam on a car and def never ever do it 3 times
why ?
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Old 03-15-2018, 05:31 AM
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Originally Posted by AndreNY View Post
you should never use 2 cans of seafoam on a car and def never ever do it 3 times
I wonder on what base you say this

You can use this as many times as you want, also, it does not harm sensors
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Old 03-15-2018, 05:39 AM
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Originally Posted by AndreNY View Post
you should never use 2 cans of seafoam on a car and def never ever do it 3 times
I see you have a great experience in engines, when reading your posts, lol
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Old 03-15-2018, 05:47 AM
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820HP kleemann & homecooked CL V12 Bi-Turbo
confirmation from SeaFoam:
Maintenance Tips: • Treatment method can be repeated as often as needed • Apply this cleaning method at least 1 or 2 times per year
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Old 03-15-2018, 12:13 PM
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2001 CL500 AMG Sport
I should probably do this as well. At 167k miles on my CL500 im sure there is alot of carbon buildup. Good post!
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Old 03-17-2018, 08:09 AM
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so here we go

CYL 11 spark plugs melted

so they can melt really quick with a bad mixture, coil-pack or hard tune, always check them first before making conclusions

replaced them, now test driving but it is raining again



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Old 03-17-2018, 08:11 AM
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as you can see here, insulators where still perfect

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Old 03-17-2018, 08:13 AM
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here coilpack numbering again
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Old 03-17-2018, 12:42 PM
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I confirm
problem is gone
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Old 03-17-2018, 12:53 PM
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also, bosch website, the OEM provider, gives FR 7 KI 332 S spark plugs as OEM iridium
the gap for the CL600 biturbo 500HP version= 0.7 not 0.8 !
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Old 03-17-2018, 12:56 PM
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same FR 7 KI 332 S with 0.7 gap for the CL65 biturbo
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Old 03-17-2018, 01:53 PM
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removing all these NKG spark plugs
got 24 pack OEM Bosch FR 7 KI 332 S on ebay for only 159 euro (195 USD)
picture is incorrect as they are iridium

https://www.ebay.com/itm/24x-BOSCH-Z...72.m2749.l2649
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Old 03-17-2018, 03:43 PM
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Old 03-18-2018, 02:27 PM
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Hi pmercury

I have asked you for the purchase information of coil packs in another thread over here as my 2008 W221 S600 has a slight misfire sometimes (not all the time).

Now the only thing i realise is that my misfire is related to the outside temperature. The colder it is, the rougher the misfire.

It usually misfires for the first few minutes and then corrects itself. Runs pretty good after that.

However, on one particular occasion, when it was really cold and i had not started the car for 3 days it misifred quite badly. So much so that it caused the CEL to come on, something that had not happened over the previous 4 misfiriing occasions. I had it read on a SnapOn machine and that gave fault codes that said misfires from Cylinders 1 through to 6.

As mine is a temperature related fault - should i still try SeaFoam or should i just replace the coil pack?

My fear is that i could replace the coil pack only for it to be the Ignition Voltage Transformer, as the fault codes are for 6 cylinders, not just 1.

Any ideas?

Thanks
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Old 03-18-2018, 04:27 PM
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Originally Posted by w4sim View Post
Hi pmercury

I have asked you for the purchase information of coil packs in another thread over here as my 2008 W221 S600 has a slight misfire sometimes (not all the time).

Now the only thing i realise is that my misfire is related to the outside temperature. The colder it is, the rougher the misfire.

It usually misfires for the first few minutes and then corrects itself. Runs pretty good after that.

However, on one particular occasion, when it was really cold and i had not started the car for 3 days it misifred quite badly. So much so that it caused the CEL to come on, something that had not happened over the previous 4 misfiriing occasions. I had it read on a SnapOn machine and that gave fault codes that said misfires from Cylinders 1 through to 6.

As mine is a temperature related fault - should i still try SeaFoam or should i just replace the coil pack?

My fear is that i could replace the coil pack only for it to be the Ignition Voltage Transformer, as the fault codes are for 6 cylinders, not just 1.

Any ideas?

Thanks
before even seafoaming, did you check the red insulators and spark plugs on the coil pack passenger side ? check those first sea foam doesn't repair spark plugs, but helps cleaning only
then, you could open the voltage transformer, look inside, the components are covered with transparent silicone stuff. that should all be clear, if any burning or dark on one side, that could be damaged

if it's the whole side, you probably have the coil pack ending his life, or the half transformer

try and find someone with Xentry Das, or get one from aliexpress, you will have more accurate codes
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