[EN] Glow Plug - Tips and Tricks
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- Опубліковано 9 лют 2025
- Glow Plug removal can be very difficult with a high risk of shearing. This video provides tips and tricks that can be applied to reduce this risk.
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Glow Plug - Tips and Tricks
#sparkplug #glowplug #ignition #engine #ngkntk
Publisher
NGK Spark Plug Europe GmbH
www.ngk.de/en/h...
NGK's advice must be refined:
1. If the plug does not move: pour oil, penetrating oil (brake fluid in extreme cases) etc with a syringe, only to fill the small cavity around the plug.
2. When/if the plug moves: try to move it as much as you can and leave it in an intermediary position, not tight when you tighten it or when you try to release it, so the thread will allow the oil/penetrating oil/etc to run in there and the engine shakes the plug around.
3. Do this for as long as you have to (in my case, 2 months) and, once in a while, try to screw/unscrew the plug as much as you can.
4. Most of the time, it's not the thread blocking the plug (in that case, you are "screwed"). It's the carbon deposit around the plug, in the combustion chamber, probably because your injectors are not working properly. If you manage to unscrew the plug but it is still not coming out, pour penetrating oil around it, let it swim for 1 day and then try again. Force it out with a spanner while rotating the plug with a socket wrench.
Requirements: time, patience, good access plugs, luck.
What kind of oil, penetrating oil do you recommend? Is using brake fluid better then penetrating oil?
@@maxzoom999 I put engine oil (5w40) so it won't evaporate.
@@maxzoom999 A good homemade penetrant is a 50/50 mix of acetone and automatic transmission fluid. But the number one penetrating fluid is seafoam deep creep. Project farm did three videos comparing various products, and WD40 for example was not even that good compared to others. I specifically ordered liquid wrench penetrating fluid (third place, the only product available to me) for this job on my BMW M57.
Thank you for posting this you saved me a 2 hour walk home!
For a silent video it was one of the best, thanks :)
Yep
Absolutely right, I've worked on almost all the tractors in the state of Nevada 😎
That is a real class act tutorial well done guys and thank you.
WOW ! Brilliant demonstration Thanks
Why are people putting on negative comments when NGK are trying to help you get over the problem? Before you jump to conclusions about why the glow plug shears off ask yourself did the car manufacturers put stipulations on the design due to weight of for heat dissipation etc.
They are trying to help you???????
They are trying to cover their ass. Can't blame them if they help you prevent the breaking of a part that shouldn't have been made in the first place.
@@Sandwich420
How is it their fault? The jammed plug can be from any manufacturer. The plug seizes because of oxidation in the shaft.
@@AnttiHarri As an engineer I would make the shaft out of something that didn't oxidise! Or you could remove and re insert the Glo plugs every 5000 Kms like the spark plugs in an old air cooled beetle :)
@@andrewallen9993 That will introduce problems greater than seizing of glow plugs.
How will using metal that doesn't corrode ( oxidise) cause problems? Do please explain :)
amazing video and info - many thanks. Will be following this when i attempt to do mine !!
Nice clear vid, only I wish all glow plugs where as easy to get to as these. but all the same good saftey tips.
I don't understand why this video has so many dislikes. It is very useful.
Thank you very much, Miles!
Could have been narrated. Or at the very least could have music.
Because its 110% bulshit. If glow plug sized, u can do nothing. Oil or any other shit not help you.
I think it's because many people expect technical videos to do their thinking for them. For me, yes this was different and the silence a bit weird at first but then I realised I had to give particular attention and think about it. In reference to my current experience, in the middle of working on a friend's car, and for this the silence was allowing.
It started off as a basic service but then some problems revealed themselves, and requires removal and service of fuel injectors and replacement of glow plugs, plus ancillary items, and this video was helpful for certain concerns. Thank you.
Impressive video, both content and graphics.
To prevent the glow plug snapping in the first place, I think it is best to use an Impact Wrench and in my opinion only use that, no other tool. The is because the reason, I think, it is more likely that an old glow plug may snap is undue side load. I'll try to explain this; So as well as the rotational torque, if you are not careful you can apply a side bending force that will cause the head of the glow plug to bend side ways a little when you apply force. This is made worst if you use longer extension bar on your wrench as this acts as a lever applying more bending force if you are not careful. I suspect it is this force that cause the glow plug head to snap. If the force can be kept purely rotational (i.e. Impact wrench) then I think the old plug will come out without snapping. What do people think agree/disagree?
GREAT ANIMATION AND VERY GOOD INFO..THANKS NGK!!
clear and understanding. now i know what it is.Thanks
Nice animation
i thought my laptop speakers stoped working after playing your video
NGK su najbolji grejaci i oni su moj prvi izbor
Wow, those glow plugs are easy to reach. You should try it on a Mercedes OM642 engine.
It's time to kick ass and chew bubblegum and i'm all out of gum 😂😂
Om642 is ok mate, changed mine couple of times. Easy to reach Try on 1.4 Hdi French diesel, no bloody chance. They are so hard to reach that by the time you remove all plastic trim off the engine, it'll be dead cold. Snapping guaranteed!
@@almedinbostan9971 it’s time to kick gum and chew ass 😃
Same on a Vauxhall/Nissan/Renault van. Also no graphic of the mechanic ripping their hands apart on various bits of sharp metal. Oh to get a vehicle where working on it isn’t like keyhole surgery!
Why can the manufacturers not come up with a decent idea to PREVENT plugs from shearing in the first place? I've got a 3.0D X5 with 4 broken plugs (out of 6) stuck in the head from the previous owners attempts at removing them.
Have you tried anti-seize? www.google.com/search?q=anti+seize&rlz=1C1CHBD_enUS811US811&oq=anti+sie&aqs=chrome.1.69i57j0l5.6192j1j8&sourceid=chrome&ie=UTF-8
That's what we used in the US Army.
@@snowwhite7677 LOL It's like telling a pregnant woman : Have you try a condom !!!!
They have, 1964 Mercedes Benz 200d Heckflosse. Uses BIG Bosch glowplugs :) that don't shear, just come out like spark plugs.
@@snowwhite7677 I think any ceramic paste would do (ceramic paste is good for up to 1400 Celsius). However, why don't they put some anti seize on them from new? :) cheaper than making this video, right?
@@silviuguseila2552 Well it depends. When do the glow plugs usually need to be replaced on an engine?, and when they need to be replaced, is the engine Out of Warranty?
Cutting corners and making a product designed to fail in a specific time/mile range has become a Science for today's manufacturers. It's all about getting you into a New Loan.😈
Thanks for the tip on the ceramic paste. Thankfully the only diesel I have right now is an M35a2 with an LTD465 Multi-fuel and they don't have glow plugs.😅
Very good
Nice one ngk you tell a customer that I can't change their glow plugs for a week on a car that's hard to start because they won't have none of it from me
awesome video! ty
Hello , what kind of oil before removing plug is better to use in this case?
Hi Davide, it doesn't matter which oil you use. You could use some oil from the dipstick, for example.
Nice information sir
Great video and animation ,thanks !
IS THIS TRUE ? You should soak with oil, leave it a week of normal driving and only then attempt to remove. Also I have a VW Bora 1.9 tdi - I cant seem to find this "reamer" kit, does not seem a very common tool, which you would think it would be if the manufacturer recommends using it. Also, is HOT engine best to remove. And why dont they recommend the grease that you can buy for inserting the new ones. Must they only be inserted dry ? If so, why do companies make glow plug grease.
Hi Ferenc, yes it is.
Oil in combination with temperature, time, and attention to the pull-off torque can help loosen the glow plug.
Oil is also used to loosen stuck screws and corroded metal joints. Oil cannot dissolve the rust but suspends the rust particles.
In the case of a stuck glow plug, this is an option and recommendation that increases the chance of being able to loosen it (as described in the video).
The reamer can be found in the web from expensive to cheap and even in supermarket online stores.
I changed mine on my 2008 Audi A6 1st 3 came out fine but no 4'was a nightmare. Lots of w40 and days of trying it came out eventually while the engine was running
Please tell me the name of the 3d program thn y are the best
please tell me how to distinguish an original candle from a fake?
Hi, please have a look at our quick guide on how to distinguish between original and fake products: www.ngkntk.com/newsroom/social-news/emea/fake-products-how-to-avoid-them/?fb=emea
Why do engine manufacturers NOT apply a high temp anti-seize to the plug during engine manufacture? The only reason can be is they want the plugs to break on removal to support their dealerships.
Hi Terry. Anti-seize, grease, or oil reduces the friction between the spark plug and the cylinder head to an extent that cannot be estimated but the correct tightening torque is defined under clean and dry conditions. That means it is extremely likely to over torque the spark plug during installation. Possible consequences can be: damage of the spark plug metal shell and spark plug structure, overheating and electrodes can melt, engine damage, and damage of the thread in the cylinder head.
Good job !!thanks
good job, really helpful
Glow plug replacement is tight on the Lbz Duramax
which silicone free grease would you recommend
Hi Edward. We recommend to use oil. Penetrating oil is best to use. If it's not available, you can use oil from the dipstick.
what this torque wrench brand? it looks cool
I think it might be just computer simulation...
Very nice animation.
Amazing video guide. Thanks
Really useful video thanks
Awesome video of the trade
Should add oil or w40?
Hi Salah, penetrating oil is the best to use.
Graphite grease would help next time
Why using threads that sieze up over time and then are very hard to get out. Why not use a circlip system to secure them in place?
Blow off due to compression
Great video.
Guaranteed to work procedure below:
1) break plugs
2) remove cyl head
3) drill
4) clean
5) install new plugs
6) reinstall cylinder head, timing belt and all that stuff and waste two days of your life dealing with that crap
Alternative method:
1) avoid diesel engines
😁
They will always be more reliable and more efficient then gasoline. That’s like saying don’t buy a gasoline motor bc you might strip a spark plug
Nice 🤩
Awesome video
4 years of a mechanic school in 4 min :)
Is it okay to put the anti seize on the thread of the plug?
from watching about 5 vids - no
use either ceramic or graphite grease
Using anti size will throw off the torque specifications, with that said just don't torque it to the max.
Some anti seize compounds such as "silver goop" contain 20%-30% pure silver. "Silver Goop" is suitable for up to 1500°F. ( )
However, "Silver Goop" is Not recommended for use on aluminium.
As we all learned in school, SILVER is only second to GOLD when it comes to conducting electrons. (Copper is much less than silver or gold when it comes to free electrons in the outer atomic layer....ie ELECTRONIC CONDUCTIVITY)
In any case - the glowplugs have 2 (two) surfaces where they contact the head.
1)Threads
2)taper-seat (between the threads and the heater)
Most folks only apply antiseaze to the threads so the taper-seat is still "dry". Personally, I apply to BOTH the therads and the taper-seat.
Even if somone was to use some kind of non-conductive paste on BOTH the threads and taper-seat... it would be almost impossible to eliminate the electrical-contact with the head.
Bottom-line: Dont worry about what kind of antiseaze compound you use... as long as it is rated for use on aluminum.
Before you call me an idiot let it be known I am a dealership master tech and have 23 years of experience .
Nice idea thanks 😊👍
In some cars I can't even touch the glow plug. What about torque wrench use.
Calibrate your hand. All experienced mechanics have one
What do u mean with time? Grt
give the oil some time to penetrate the threads. 😁✌
a thin coat of high heat copper coat would help for next time.
icelineman No, never use copper on aluminium
What is the true than? In many other videos it is recomended to use copper grease by mounting back.
Attila Majoros i think some people use ceramic grease
@@attilamajoros3231 Use ceramic or graphite grease..never copper. It is kinda OK-ish until moisture gets there and it will. Then thanks to galvanic action it will corode shit out off it.
Super video
Has any body tried Kroil for this instead for WD40?
Virtually all penetrating lubricants are better than WD40. Kroil has a good reputation.
Check out this channel Project Farm. He tests about 20 different penetrating oils including WD40, diesel, ATF & plain water.
Episode 1: ua-cam.com/video/xUEob2oAKVs/v-deo.html
Episode 2: ua-cam.com/video/st8dkGzJWtg/v-deo.html
Episode 3: ua-cam.com/video/nWfBjTJa-A4/v-deo.html
Thank you. Very useful video.
May I know what is a glow spark plug is???
Diesel engines use glow plugs instead of spark plugs in a gasoline engine. Diesels are high heat/ high compression engines, and diesel fuel is not ignited using a spark. The glow plug heats up the cylinder and allows the diesel fuel to combust properly.
Glow plugs are used when starting the diesel engine in the cold as cold air is difficult to ignite , hence they warm up the air before being compressed
Yeh try this on an N47D2001
Thank you.
Will WD40 help to lubricate the plugs over a few days before removing them or is a drop of engine oil better ?
The WD40 is just an old crappc crap and mostly Useless compared to a modern rust dissolvers ot synthetic or other lubricants .
Check out this channel Project Farm. He tests about 20 different penetrating oils including WD40, diesel, ATF & plain water.
Episode 1: ua-cam.com/video/xUEob2oAKVs/v-deo.html
Episode 2: ua-cam.com/video/st8dkGzJWtg/v-deo.html
Episode 3: ua-cam.com/video/nWfBjTJa-A4/v-deo.html
If Alcon Coppersolid Copper Mounting Paste is used in the assembly of spark plugs, this is not troublesome.
Bujilerin montajında Alcon Coppersolid Bakırlı Montaj Pastası kullanılır ise bu zahmet yaşanmaz
Copper in an aluminium head.....great advice
What the f..... How about put some heat resistant grease on new glow plug threads?? most important thing. But advise how to remove old plug is really helpful, just some wd-40, time and patience.
Yeah ... " Glühkerzenfett " - grease with ceramic microparticles ev. graphite !
Come into the real world and try it. Not so easy when the carbon is really seized on!!
And glow plugs are made to brake lower noton the treads
Do you know a better way to do it? If cant suggest anything better, dont criticise.
@@xdygmnyrdf There's always a better way to do it, and when you did it the better way there is still a better way to do it. Is called evolution. For example they could have designed an easier way to acces those glow plugs. I treat spark plugs like this. Every year i take them out, so they never reach to that point of wich the thread will break, doing this i also know if a spark plug is too worn, and i have to replace it(i personally replace all of them when one is compromised). You don't need no special tools, or thread cleaner or anything if you simply remove them from time to time the threads will clean itself. But newer cars everything is so compact and tights even an operation like thise require to strip things off the engine. Wich is why glow plugs are left to rot till is too late, because it requires a shop and special tools and knowlage. Most people don't know what is what when take the cover off the engine. Everything is designed to eat more money. First they could have started by making an easy acces to those glowplugs, then make a larger diameter hole and thread, beefing it. But these engines are designed to last as much as the warranty, every car maker should state this clear to new buyers.
Any advice for removal of broken glow plug in Duramax engine?
Is there a preburn chamber?
If so, you can likely remove the injector, push the tip through and catch it with a magnet. Blow/vacuum debris out of cylinder, then reassemble.
If the stem broke below the threads, drill and tap it, thread a long bolt into it with a stack of washers and a nut on it, and pull (press) the stem out like an old bearing.
nice video
Good video sir
Use brake oil instead trust me
Very very nice video I like it this my best job
Nice
Fac unii niste videoclipuri de ti-e si frica sa mai pui mana pe cheie 😄😄
I concur.
Boa noite mais qual óleo usar
320d wont start and diesel dont go to diesel rail from high pressure pump to injectors
"put some oil"... what type of oil? engine oil? mineral? synthetic?
Hi, it doesn't matter which oil you use. You can use some of the oil from the dipstick for example.
@@NiterraEMEA I think it really matters : heat resistand deeply penetrating shyntetic solvents - as known burnt carbonised oil is really difficult to slack
Can you use different length glow plugs then stock ones ? I bought NGK plugs for my car but they appear longer than the stock glow plugs. Not sure if they'll end up smashed by the piston?
Hi! May we know where you got the glow plug from and where you get the glow plug's specifications from (catalogues, retailer etc.)? It's always crucial to theck the engine's specifications and check which model fits. If you like us to check please send us an email with your car specifications and we will give you the right glow plug number to purchase: www.ngkntk.com/contact/?fb=emea. We wouldn't recommend using the new one you purchased if it appears to you that it's not the right glow plug, it could cause a lot of damage.
I have a broken tip stuck in my head and I was think to flood it with EGR cleaner and turning the engine on. Do you think that piston could blow it out without causing more damage ??
***** once the piston starts to create negative pressure the intake valve opens. Then the piston goes up creating high pressure that should push tip out.
I am sure that it won't suck itp in and just more concern about the power it would blow it out
Ngk d power
is someone out there proven these trick and it works?...
Nice and glow
Which grease is used for cleaning?
@@NiterraEMEAIs carb cleaner can do the trick?
Lithium grease should be ok
hello! what kind of oil should I use for lubrication before removal? WD40 or similar? is there a specific oil? thanks
Damp rug with kerosine put around the plug for the night does the same thing
Check out this channel Project Farm. He tests about 20 different penetrating oils including WD40, diesel, ATF & plain water.
Episode 1: ua-cam.com/video/xUEob2oAKVs/v-deo.html
Episode 2: ua-cam.com/video/st8dkGzJWtg/v-deo.html
Episode 3: ua-cam.com/video/nWfBjTJa-A4/v-deo.html
Thank you, is that measured in inch pounds or foot pounds. I think inch pounds, but I'm afraid of shearing one off on my F- 250 7.3. The truck is a 1993 and has been sitting for 15 years. Very afraid. Thank you in advance for any tips in addition to the one your company has already provided. Getting the glow plug out nearest to the firewall of the engine on the driver's side is going to be scary.
It's in Nm. 40Nm converted to lbft is about 29.5.
Did you succeed?
pls tell me the name of 3d program
ps
Well thats time waisting , why just not make or remake a stronger version plugs ???
@@NiterraEMEA sounds like an issue u may have with the suppliers you supply. ur response was highly UNPROFESSIONAL.
@@michael-dm2bv i agree, NGK are meant to be one of the top companies to make these and spark plugs yet* so many people snap them with little to no force applied. It's such a disaster to have these break and costs a small fortune to have them removed.
This reminds me of those Ford engines that use the thin spark plugs that snap off in the engine. It's mainly the engine manufacturer. The part supplier is also at fault for making parts that are doomed from the beginning.
@@Sandwich420 - suppliers chase money while engineers slowly make things more difficult to service. a responsible company would deny a companies request for a 10 mm glowplug. a glowplug with larger threads could fit very easily and would be that much stronger but in a world that chases disposable tin can cars and manufacturers that gladly make and supply them it is what it is. by rights aluminum threads on an engine should be illegal. especially regarding critical applications. a cast in steel insert is more than easy to accomplish in this day and age. i can tell you an old story, never touch an engineers shoulder if he tries to walk away from you because he is too all mighty to argue a non engineers better perspective. they will snap. in my life, i've only looked into the eyes of a few people that would have torn my eyeballs out if they could have. an engineer was one of them. when push comes to shove they just act like they are illiterate and try to leave the room as if reading was a curse. its the mentality that drives every auto manufacturers engineering department. its why their is ZERO STANDARDIZATION in the industry and why every engine bay is becoming exponentially more like an abortion every year. engineers wouldn't be caught dead swinging wrenches. neither would the white collars of any major car maker. only grunts do that. lets feed them shit. its like that scene from fight club when they catch that guy in the bathroom. where's the rubber band!
ngk ntk. in. spanish how to change. spark plug 2008 Toyota yaris 4 cily 1.5. do you have a. more video. thank. you.
What kind of oil should I use?
Atf mixed 50/50 with acetone
a glow plug is NOT a spark plug, wrong title.
Why diesel dont go throw to diesel rail from high pressure pump pump
where is the music
darude - sandstorm
22Nm (190 in•lbs) shear torque for an M8 plug!?No wonder shade-tree mechanics snap plug off like dry twigs... :-/
** M9 plug
3:49 NGK SPARK PLUG... erhmmm now i'm gonna ruin my engine O_o? lol
مع اخوك العربي موجود 3 حلول لي حب اذكرها له يتفضل
no good , what if the glow plugs are gone ,how you gone drive it.
Hopefully you only snap one. The engine should still run.
USE ANTI SEIZE!!!!
Can please someone here show me how to remove the broken glow plug , and not just this crap at which factoryes forgot to solve this problem because in older times this wasn't the problem at the engines ?? !!! ?? Thanks.
tip buy petrol car
Torque wrench was backwards
我聋了？