Just done the exact thing on an old cls Merc i bought,problem i had was the tap i used on the head must have been slightly worn,insert had a little side to side play while screwing it into head,but i 'think' it's holding a gas tight seal,i put a little cold steel putty on the insert threads. I had same problems you had,lip of the insert didn't suit the shape of the head,and the insert 'inserting tool' snagged off the head,but i just ground the edges off the tool so it went down further clearing the glow plug head recess. Fun little job though! Some tips for folk removing glowplugs,steep round the glowplug in brake fluid overnight!Works brilliant,it seeps right down whole length of glowplug!i didn't even need to have the engine hot! Next tip is if you drill out the threads that keep the glowplug in the head,then can't pull out the glowplug body after you've tapped threads in the glowplug body,don't panic!! Again drip in some brake fluid again overnight and leave it,you'll see in morning all brake fluid has disappeared!! So then place a piece of thick wood over the glowplug hole and turn over the engine,the glowplug body 'should' shoot right out!!! Next tip slacken glowplugs very carefilly and patiently,it's 'not' like unscrewing a sparkplug!!Just apply slight tension on yoyr socket and ratchet,don't force it!!Just even pressure and you'll suddenly hear a little crack,then very carefully tighten again,then slacken again,then tighten again,then it should slacken all the way! Don't apply sideways pressure on the glowplug while slackening,make sure your socket and extension bar are totally vertical/inline with the glowplug!!
If you make it with a crushable washer (a)it costs a penny more (cant have that !) (b)i think it would carbon up all the way up and seize in even more But i do think they should make them accessible like spark plugs and change them every two years or so. I always grease the threads with copper slip and they come out like a dream next time
I was thinking more if the thread was in the combustion end of the cylinder head like a spark plug, rather than being threaded at the outer part of the cylinder head and there fore no carbon build up. It's always a bonus when they have been anti seized, you are right, they won't put extra cost onto an engine just to help mechanics
I had thought about doing that, then figured out that the other way will do the same job and save the tool. Incase the tool will work ok on another car. Cheers Matt
Just done the exact thing on an old cls Merc i bought,problem i had was the tap i used on the head must have been slightly worn,insert had a little side to side play while screwing it into head,but i 'think' it's holding a gas tight seal,i put a little cold steel putty on the insert threads.
I had same problems you had,lip of the insert didn't suit the shape of the head,and the insert 'inserting tool' snagged off the head,but i just ground the edges off the tool so it went down further clearing the glow plug head recess.
Fun little job though!
Some tips for folk removing glowplugs,steep round the glowplug in brake fluid overnight!Works brilliant,it seeps right down whole length of glowplug!i didn't even need to have the engine hot!
Next tip is if you drill out the threads that keep the glowplug in the head,then can't pull out the glowplug body after you've tapped threads in the glowplug body,don't panic!!
Again drip in some brake fluid again overnight and leave it,you'll see in morning all brake fluid has disappeared!!
So then place a piece of thick wood over the glowplug hole and turn over the engine,the glowplug body 'should' shoot right out!!!
Next tip slacken glowplugs very carefilly and patiently,it's 'not' like unscrewing a sparkplug!!Just apply slight tension on yoyr socket and ratchet,don't force it!!Just even pressure and you'll suddenly hear a little crack,then very carefully tighten again,then slacken again,then tighten again,then it should slacken all the way!
Don't apply sideways pressure on the glowplug while slackening,make sure your socket and extension bar are totally vertical/inline with the glowplug!!
@@bobbaxter952 that's excellent, thanks 👍
hi matt good to see you putting out videos,But i would like you to show how it done when your doin the job. Very good video all the same
Ingenuity wins again! Like the greased tap to catch the chips too.
Had the same problem when installing an insert. Solved it by mashining down the OD of the instalation tool.
Clever work around Matt. Sorted…all that matters. I like the swarf catch idea. 🍻👍
Thanks, I got this glow plug repair kit a while ago, just incase I need it one day. Finally got to use it today. Cheers Matt
great idea to hit the threads
Thanks for watching
If you make it with a crushable washer (a)it costs a penny more (cant have that !) (b)i think it would carbon up all the way up and seize in even more But i do think they should make them accessible like spark plugs and change them every two years or so. I always grease the threads with copper slip and they come out like a dream next time
I was thinking more if the thread was in the combustion end of the cylinder head like a spark plug, rather than being threaded at the outer part of the cylinder head and there fore no carbon build up.
It's always a bonus when they have been anti seized, you are right, they won't put extra cost onto an engine just to help mechanics
Why not grind the tool to fit down?
I had thought about doing that, then figured out that the other way will do the same job and save the tool. Incase the tool will work ok on another car. Cheers Matt