How to access glow plugs
Thread Starter
Newbie
Joined: Nov 2014
Posts: 4
Likes: 0
ML320 2008
How to access glow plugs
Hi all,
I want to replace the glow plugs on my 2008 ml320 w164 how would I get to access the glow plugs ? Are there any charts or diagrams to illustrate this available too ?
Thank you in advance
I want to replace the glow plugs on my 2008 ml320 w164 how would I get to access the glow plugs ? Are there any charts or diagrams to illustrate this available too ?
Thank you in advance
Super Member
Joined: Dec 2007
Posts: 898
Likes: 9
From: Woodstock, IL
His 2019 RAM Cummins Turbo Diesel Laramie; Her's 2007 ML320 CDI P3; Mine BMW R1200R
Warm the engine to operating temp.
Remove the engine cover
Remove the black T shaped air duct that connects between the air filters and the turbo.
Remove the glow plug electrical connectors and unscrew the glow plugs.
DO NOT DROP THE OLD OR NEW GLOW PLUGS. They can hairline fracture very easily.
Remove the engine cover
Remove the black T shaped air duct that connects between the air filters and the turbo.
Remove the glow plug electrical connectors and unscrew the glow plugs.
DO NOT DROP THE OLD OR NEW GLOW PLUGS. They can hairline fracture very easily.
dgiturbo
Senior Member
Joined: Aug 2009
Posts: 427
Likes: 57
13 GL350, 14 SL550
I think there was a maximum torque that you can apply while *removing* the plug. Look on sprinter forums (or any forum that deals with OM642 engines)
It said that if you have to apply more than x ft lbs of torque, you're gonna break the plug. So you set your torque wrench to slightly lower than that amount, and work the plug back and forth till it comes out. There is carbon in the head that jams the glow plug, and you dont' want to break the plug or you can't remove it!
Also as mentioned do this at full operating temperature, NOT COLD otherwise you'll screw up the threads.
It said that if you have to apply more than x ft lbs of torque, you're gonna break the plug. So you set your torque wrench to slightly lower than that amount, and work the plug back and forth till it comes out. There is carbon in the head that jams the glow plug, and you dont' want to break the plug or you can't remove it!
Also as mentioned do this at full operating temperature, NOT COLD otherwise you'll screw up the threads.
