M264 spark plugs on 2020 looking for spec and or guide
05-22-2024, 12:11 PM
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2020 GLC 300
M264 spark plugs on 2020 looking for spec and or guide
I am not seeing any guides for replacing 2020 (M264 only) and newer GLC 300 spark plugs. Does anyone have a guide with torque specs and which type torque wrench to use? Also is there any specific grease needed to be applied on the white insulator or threads?
Thanks
Thanks
05-22-2024, 06:50 PM
#2
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Originally Posted by BA796
I am not seeing any guides for replacing 2020 (M264 only) and newer GLC 300 spark plugs. Does anyone have a guide with torque specs and which type torque wrench to use? Also is there any specific grease needed to be applied on the white insulator or threads?
Thanks
Thanks
Torque is 23 Nm on plugs and 8 Nm on coil bolts.
Yes, use grease A 002 989 80 51
I used dielectric from amazon.
Nothing on threads, as it can impact torque value.
Nothing about indexing in WIS but you can find a lot of discussion on MB indexing.
05-22-2024, 08:02 PM
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2020 GLC 300
I have WIS AP15.10-P-1580CWF from 07.02.2020 for 274 engine, i can provide if you like.
Torque is 23 Nm on plugs and 8 Nm on coil bolts.
Yes, use grease A 002 989 80 51
I used dielectric from amazon.
Nothing on threads, as it can impact torque value.
Nothing about indexing in WIS but you can find a lot of discussion on MB indexing.
Torque is 23 Nm on plugs and 8 Nm on coil bolts.
Yes, use grease A 002 989 80 51
I used dielectric from amazon.
Nothing on threads, as it can impact torque value.
Nothing about indexing in WIS but you can find a lot of discussion on MB indexing.
07-01-2024, 05:02 PM
#4
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Can someone please confirm the spark plug torque is 23 NM for the 2020 GLC300? What's been listed is for the M274 engine.
07-02-2024, 10:20 PM
#5
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Duh! It was written on the side of the Bosch spark plug box. 23 Nm. I replaced all 4 easily in under a hour. Dielectric grease on the boot only. Make sure you blow out the hole BEFORE removing the old plug.
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chassis (07-05-2024)
07-04-2024, 12:29 PM
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former- 10&14 ML BlueTecs, 20 GLE450 E-ABC, 15 Cayenne D, 17 Macan
Do you use antisieze? I would, although it changes torque values.
07-05-2024, 06:29 AM
#7
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There was a lot of tiny debris in the spark plug pocket that blew back at me when I shot the 100 psi from a blowoff air nozzle.
I have never used anti seize on plug threads. Never had a problem. I've had 5 MBs and at least half a dozen of other makes. Usually change plugs between 50K to 90K miles. The spark plug replacement on the M264 engine is about as easy as it gets. There's nothing to remove other than the big cover on top to access the ignition coils. The coils can stay electrically connected. Plenty of room to pull the tube off each plug. 23Nm is not a lot of torque. I used my smaller torque wrench. I discourage using the one commonly for tires.
I have never used anti seize on plug threads. Never had a problem. I've had 5 MBs and at least half a dozen of other makes. Usually change plugs between 50K to 90K miles. The spark plug replacement on the M264 engine is about as easy as it gets. There's nothing to remove other than the big cover on top to access the ignition coils. The coils can stay electrically connected. Plenty of room to pull the tube off each plug. 23Nm is not a lot of torque. I used my smaller torque wrench. I discourage using the one commonly for tires.
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Bdevil82 (07-13-2024)
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07-17-2024, 10:23 AM
#8
There was a lot of tiny debris in the spark plug pocket that blew back at me when I shot the 100 psi from a blowoff air nozzle.
I have never used anti seize on plug threads. Never had a problem. I've had 5 MBs and at least half a dozen of other makes. Usually change plugs between 50K to 90K miles. The spark plug replacement on the M264 engine is about as easy as it gets. There's nothing to remove other than the big cover on top to access the ignition coils. The coils can stay electrically connected. Plenty of room to pull the tube off each plug. 23Nm is not a lot of torque. I used my smaller torque wrench. I discourage using the one commonly for tires.
I have never used anti seize on plug threads. Never had a problem. I've had 5 MBs and at least half a dozen of other makes. Usually change plugs between 50K to 90K miles. The spark plug replacement on the M264 engine is about as easy as it gets. There's nothing to remove other than the big cover on top to access the ignition coils. The coils can stay electrically connected. Plenty of room to pull the tube off each plug. 23Nm is not a lot of torque. I used my smaller torque wrench. I discourage using the one commonly for tires.
07-17-2024, 07:14 PM
#9
MBWorld Fanatic!
Originally Posted by speedlaw
Related, I just did plugs on my C43, which while a different engine with unrelevant foibles for the GLC, the hard part is getting the coil boot off the plug, definitely use some dielectric on the reinstall. The 23nm is so the plugs exactly line up (index) in the cylinder, which is also why I went with OEM parts. Same torques for plug and coil boot.
I did OEM plugs too and they were allover, WIS dons't call any indexing procedures. But its all on 274 engine.
