3.0d e53 glow plug change

[Clavurion]

Originally Posted by wpoll

Thanks for the extra info. Clavurion.

Interesting to note that Beru suggest applying power to the glow plug to heat it up, as an alternative to warming the engine.

Which raises another note (for the sake of the thread...) - the M57 uses 12v glow plugs but the LCI cars with the M57TU uses 5v glow plugs. Beru note only applying power to the older 12v plugs. They may state this simply because a high current 5v power source is not a common option for most mechanics but it generally means that those of us with the M57TU will be warming the engine before disassembly.

Applying voltage will work if the glow plug been removed id not totally dead.

Newer alternate supply voltage plugs are basically 5 V glows (for longer after glowing) but can withstand short period of 12 V supply like on the pre-heating before engine start.

[andrewwynn]

I use my torque adapter (think digital torque wrench) to monitor breakable things when removing sounds like this is one of those cases.

Heating the engine block will make the hole the plug is in bigger. Heating the glow plug will make it bigger which sounds counter intuitive until you realize that it's thinner than long Soo you will be reducing the tension on the threads. Both combined might work well. Also, like tapping threads, back and forth can get the carbon out and if you get any motion and it binds, more liquid wrench, it will capillary through the entire threads