Glow Plug Safe Removal Torque?

Discussion in 'VW Mk4 Jetta, Golf, New Beetle, Passat TDI forum' started by Ghostbuster83, Feb 20, 2017.

  1. Ghostbuster83

    Ghostbuster83 New Member

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    I am going to change the glow plugs on my 1,9TDI Mk4 Golf TDI and I am terrified that they will snap and render the car useless. I got the idea of using my torque wrench for the removal to stay safe. If they won't come out I just have to skip the job and hope for mild winters :) Can anybody confirm a safe removal torque? I tried googling but I didn't get any luck.
     
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  2. mu2bdriver

    mu2bdriver Active Member

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    Do you know that they're overtorqued? I think the spec is 10ft/lb so it should be pretty gentle to remove and I've never seen a reverse-style torque wrench. If they're really locked in there, buy a bottle of AeroKroil penetrating agent and use that to penetrate and loosen up.
     
  3. Ghostbuster83

    Ghostbuster83 New Member

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    Hi again, and thanks for the response. Well I think that it is safe to assume that the loosening torque will be a great deal higher than what was used to tightening them due to rust, time and corrosion no matter how much oil I use. I want to avoid them snapping on me for all cost. So I got the idea that maybe someone had an opinion on what to set my torque wrench on? And by the way my torque wrench definitively goes both ways.

    I like the idea about the torque wrench because i don't have a very good feeling with these things I will probably end up using too much force if I use normal tools.
     
  4. Tom MacDonald

    Tom MacDonald Member

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    Make sure you have the engine at top temperature before you take them out, that will make things easier.
     
  5. YMZ

    YMZ Super Moderator

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    According to Beru, the 10mm glow plugs will break at 35 nM (~25 Ft*Lbs)... So... stay well below that... warm engine helps...
     
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  6. Keithuk

    Keithuk Super Moderator

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  7. YMZ

    YMZ Super Moderator

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    Those torque figures are for tightening... the question was about loosening after the glow plugs have been sitting in the cylinder head for years... they're known to break... heat and loosening/release fluid are needed... (as well as proper technique - applying only rotational force along the axis...)

    Yuri
     
  8. xeno555

    xeno555 Well-Known Member

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    The torque to remove, depends on how stuck they are. I would spray with PB(penetration oil not wd40) cold then drive, then spray again hot. Do that a couple times to loosen.
     
  9. Keithuk

    Keithuk Super Moderator

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    No one will give you a torque setting for loosening something, you use common sense and heat.
     
  10. chittychittybangbang

    chittychittybangbang Administrator

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    Don't forget to try some PB blaster or other penetrating lube. Not WD-40, that's just regular lube.
     
  11. Ol'Rattler

    Ol'Rattler Well-Known Member

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    VG question. Use as little torque as possible and work them back and forth many times until they gently screw out. What happens is carbon deposits on the tips and they can seize up and break with not much more than installation torque.
     
  12. Oldaccord

    Oldaccord Active Member

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    Never use a torque wrench in reverse as you will screw the internal spring that is used for torque tension, once used reverse the torque wrench may no longer be accurate!
     
  13. Oldaccord

    Oldaccord Active Member

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    As mentioned! Start engine, bring to optimal running temp, shut engine off, Spray some pb, liquid wrench, or nutbuster spray on the glowplugs, ensure your socket and extension are straight and remove away! If you have a mechanical aptitude youll know what's tight and break the glow plugs tights!
     
  14. T5 AllTerrain

    T5 AllTerrain New Member

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    I just used the extender and a special glow plug pipe. It was only hand tight. :) And mine were OLD! (400000km)
     
    Last edited by a moderator: Mar 6, 2017
  15. BOWZ

    BOWZ Member

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    Just pulled mine again after 100K and 3 years, PB blaster PB blaster PB blaster is all I can say. One of mine was insane to get out, creaked the whole time turning it, and when installed the first time I used hi-temp anti seiz. Let us know what you come up with.

    Bowz
     

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