M275 spark plug torque range
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2006 W220 S65 AMG
M275 spark plug torque range
Apologies if this has been asked and answered, but a few searches in this section did not reveal much. I'm pulling all 12 plugs on the passenger side this weekend and replacing them with new NGK IFR6Q-G pieces and was wondering about the correct torque range when tightening down? I've heard 15-25 Nm or 11-18 ft. lbs of torque is required. Is that correct?
Additionally, I plan to put a little bit of anti-seize on each plug thread prior to installation unless otherwise told. I don't know if MB calls for clean threads or not, but in my experience, it's always good to add a tiny bit of anti-seize on plugs going into aluminum heads.
One last thing - when rotating the passenger side intercooler out of the way, I think I recall someone stating once to be very careful about a vacuum tube attachment on that side which could snap when moving the intercooler. I can't seem to find that thread now, so anyone who's done this before, grateful if you could share your experience working on the passenger side coil area.
FWIW, this is the MBworld thread I'll be referencing when tackling this job. The OP only mentions driver side while stating the passenger side is similar but slightly different in some aspects.
Many thanks in advance.
Additionally, I plan to put a little bit of anti-seize on each plug thread prior to installation unless otherwise told. I don't know if MB calls for clean threads or not, but in my experience, it's always good to add a tiny bit of anti-seize on plugs going into aluminum heads.
One last thing - when rotating the passenger side intercooler out of the way, I think I recall someone stating once to be very careful about a vacuum tube attachment on that side which could snap when moving the intercooler. I can't seem to find that thread now, so anyone who's done this before, grateful if you could share your experience working on the passenger side coil area.
FWIW, this is the MBworld thread I'll be referencing when tackling this job. The OP only mentions driver side while stating the passenger side is similar but slightly different in some aspects.
Many thanks in advance.
Last edited by amstel78; Feb 8, 2017 at 08:38 AM.
Thread Starter
Senior Member
Joined: Jan 2017
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2006 W220 S65 AMG
WDBNG79J56A477014
Not sure why a VIN is needed for spark plug torque range for an M275 TT but there you go.
Not sure why a VIN is needed for spark plug torque range for an M275 TT but there you go.
Thread Starter
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2006 W220 S65 AMG
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S600
On the plugs I've just snugged them up and given another ~1/2 turn to crush the metal gasket, per NGK recommendation. Use antiseize and don't overtighten.
https://www.ngk.com/learning-center/...orque-settings
"Without a Torque Wrench:
If a torque wrench is unavailable, finger tighten the spark plug, then use a plug wrench to tighten.
NGK -1/2-2/3 turn on plugs with a Gasket. 1/12-1/8 turn on plugs with a tapered seat."
In the pictures you can see the hose extending from the front corner of the passenger side intercooler. It connects to a pressure sensor. I just unbolt the sensor from the bracket, unclip the wire, and leave the rubber hose attached. I broke the nipple off the sensor once but thankfully was able to super glue it back on. Cheers
www.hal600.tumblr.com
https://www.ngk.com/learning-center/...orque-settings
"Without a Torque Wrench:
If a torque wrench is unavailable, finger tighten the spark plug, then use a plug wrench to tighten.
NGK -1/2-2/3 turn on plugs with a Gasket. 1/12-1/8 turn on plugs with a tapered seat."
In the pictures you can see the hose extending from the front corner of the passenger side intercooler. It connects to a pressure sensor. I just unbolt the sensor from the bracket, unclip the wire, and leave the rubber hose attached. I broke the nipple off the sensor once but thankfully was able to super glue it back on. Cheers
www.hal600.tumblr.com
Last edited by Colin Frolick; Feb 10, 2017 at 08:18 PM.
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Thread Starter
Senior Member
Joined: Jan 2017
Posts: 470
Likes: 25
2006 W220 S65 AMG
Thanks Colin.
Managed to get the passenger side coil pack out yesterday along with all 12 plugs. Discovered that the 4 plugs from cylinders 5 and 6 were oil fouled. Not sure what's going on there. Hopefully it's just a case of a bad coil pack and the plugs got fouled after some time. If not, perhaps a bad injector?
Anyway, I have a digital torque wrench and snugged all plugs down to 25 Nm as recommended. Normally I snug and do a half turn to tighten as well, but in this case, felt I should do everything by the book.
Going to reinstall everything tomorrow with a rebuilt coil pack from Clark over at v12icpack.
EDIT: About that vacuum tube and pressure sensor; I saw that the other day when I pulled the coil pack. Rather than unclip the sensor from its bracket, I just removed the two screws holding the bracket down next to the voltage regulator and the whole thing swung up out of the way.
Managed to get the passenger side coil pack out yesterday along with all 12 plugs. Discovered that the 4 plugs from cylinders 5 and 6 were oil fouled. Not sure what's going on there. Hopefully it's just a case of a bad coil pack and the plugs got fouled after some time. If not, perhaps a bad injector?
Anyway, I have a digital torque wrench and snugged all plugs down to 25 Nm as recommended. Normally I snug and do a half turn to tighten as well, but in this case, felt I should do everything by the book.
Going to reinstall everything tomorrow with a rebuilt coil pack from Clark over at v12icpack.
EDIT: About that vacuum tube and pressure sensor; I saw that the other day when I pulled the coil pack. Rather than unclip the sensor from its bracket, I just removed the two screws holding the bracket down next to the voltage regulator and the whole thing swung up out of the way.
Last edited by amstel78; Feb 13, 2017 at 07:19 AM.
