I'm an automotive diagnostic specialist. Do not put the grease like that as it'll just make the coil work harder and kill its lifespan because it has to fight to get through the grease. If you want to use grease, put it on the porcelain of the spark plug only and that's it
I use a q-tip as an applicator at the spark plug’s ceramic. I feel like the grease will interfere with the conductor if I apply at the boot (as you demonstrated).
If the connection is tight between the electrical conductors then there will be NO arcing whatsoever. But you are correct. It should be applied sparingly with a q tip on the inside and outside of the boot to prevent it from sticking to the ceramic as well as stop the outside elements.
@@midnightrider1854 if the connection is tight then the silicone dielectric grease won't be a problem, but it will eliminate stray paths for high voltage and will stop water infiltration, heat damage that caused the rubber insulator becoming stuck.
I find myself using less and less of this as I get older just a super small dab…it last longer and creates less of a mess in the future. Everyone does it differently though so whatever works for you! Cool little tip.
That stuff has given me a sh** ton of electrical issues. Dialectic grease is non conductive, so be careful on what you use it on and how much. I had a vehicle with electrical issues because a previos tech used it on multiple connectors. I had to clean all that stuff off from the inside of the connector.
Then that would have meant that the connections were loose in the first place if the grease wasn't displaced when the connection was made. And they probably used too much as most people do anyway.
Same here. Not a 35 year tech, but an avid off-roader who goes through a lot of plugs. Dielectric grease isn't conductive and a lot of people use incorrectly.
Because boots aren’t separate . Youre just working on one brand so you have no perspective like that. On other vehicles you don’t want a stuck boot and have your coil come out only.
Dielectric grease is more for keeping water and dust out of connectors. They make actual boot grease. A tiny dab then swirl it around the inner boot. A light film is all you need.
Do not pack spark plug boot with dielectric silicone grease. I did this when I didn't know better, and on the 2nd spark plug replacement after 100k miles, I found some of silicone grease actually hardened like silicone sealant, which is a good insulator. It took me a while to clean it off the boot and spring inside. Only use a thin layer of dielectric grease ceramic part of the spark plug. Even this is not required and most cases and manufacturers don't use them.
Just tore apart the top of my engine to only realize I used to much grease and it’s dried up in all spark plug boots and connections will be cleaning and we shall see if 0300 goes away.
that will get on the contact of the spark plug when installing - shouldn't you only coat the outside (white ceramic part) of the spark plug instead of injecting into the boot?
Absolutely do not just put an ass loaded glob this in your spark plug boot, take a cotton swab and run a tiny dab around the inside of the boot, it should not come in contact with the metal contacts
That is not what dielectric grease is for. You should never put dielectric grease where the two surfaces touch. Because dielectric grease does not conduct electricity. That's like saying I smear it all over the battery posts in my car. So so the cables come easily. It is not a lubricant. Corrosion inhibitor. So you would use it after you place your terminal on the post of a battery or an electrical to count the outside surfaces to prevent corrosion. You can think of it like paint. You wouldn't spray the top of your battery terminals before you put the connector on. Lol 😆
U put heaps on. Not a small dab at all. And The boot seals the contaminants out. No need to do that. Try replacing your old coils that are falling apart.
Just enough of that grease - Dow Corning #4 if you want to get a big tube that'll last your entire life - to give a dull luster on your weatherstripping will help it last.
Idk about this age old "myth" of using dielectric grease. I work for a heavy equipment repair company and a lot of the equipment has electronics on it. All the connectors come with that goop in it. We have discovered when it starts to have issues take electronics cleaner and spray all the grease out. Bam no more issues. It may have good "non stick" properties but outside of that I'd be careful where you use it
No never use anything on cool boots. The silicone grease creates a medium for combustion gasses to react with it and cause a misfire and carbon tracking eventually and attracts contaminants. That boot is easy to remove with a probe. With 100000 mile plug change intervals you don't want to be going back because you wanted to reuse a 7 dollar coil boot. Think about it your power line before your transformer runs around 17000 volts todays ign system can run as high as 50000. In fact perfectly clean your plug insulators and then never touch them by hand always use a new boot with nothing on it before that make sure your plug tube is clean so water and dirt cannot get in there. They sure will sell you all kinds of stuff but if you don't want to go back there make sure your plugs are secure and your plug insulators uncontaminated.
I love your line of thinking but the silicone rubber does in fact break down from the outside elements as well as the heat cycles from the engine. If you live near a salty area with a lot of corrosion or a very hot running engine then this stuff, in my opinion, is worth its weight in gold. I've used it professionally for over 35yrs. I've never seen one negative side effect as of today.
To those of you saying to put die electrc on eveything on your car, you do know what die-electric means right, itvmeans non conductive, ifvyou cover your ecm plugs with this it can affect the quality and ability of a low voltage connetion between the component and ecm for example sensor readings with 5 volt references, so dont put it on ecm plugs eh, they make a special greese for ecm plugs for that reason
Dielectric grease is a great sealant against corrosion and adhesion to the spark plug. However you should use less and spread it around the inside of the boots. The objective here is to keep it away from the electrical connections. It is an electrical conductivity inhibitor. Too much as is used here, can and does create running issues.
I use it on anything and everything electronic in any car i work on. If you own a Chrysler product. You better use this. If not, you'll at least be replacing your tail light sockets. Possibly your entire tail light assemblies. They're designed horribly and without dielectric grease on all the connections, they will melt
Yes it does, if you like misfires and trace arcing. Never use a conductive material on, in, or near your spark plug wires. And petroleum jelly is bad for the rubber boot. It will cause it to swell o ver time and leak spark.
Not a lot huh? You used 10x way too much. I generally use the tip of a pocket screwdriver to apply it to the inside of the boot. All ya need is just enough to cover the tip of the screwdriver
Es importante usarla, pero muchos mecánicos saltan esta parte del proceso por ahorrar tiempo y costos o por creerse más inteligentes no la usan... Siempre he dicho si un grupo de ingenieros llegaron a esa conclusión habrá que respetar el criterio técnico, si lo hacemos correctamente y no funciona pues tomaremos nuestras propias decisiones basadas en experiencia por ejemplo.
Muy bien dicho. Algo que veo con demasiada frecuencia que me irrita es cuando voy a una tienda de autopartes. El empleado ayudará a instalar una batería de automóvil, pero cuando ve el aislamiento de la batería, lo saca y lo tira porque cree que no lo necesitan.
@@ToolDemos si es muy cierto en alguna tienda de piezas o en algún taller siempre pasa eso no colocan los aislantes de batería y los tiran en la basura Tranquilo la tecnología como digo yo responder a todos en nuestros sitios vendedores de piezas vendedores de coches clientes y mecánicos
I may get killed in comments. It’s not that he used to much it’s that it was used it incorrectly, this is a mistake I have made myself. Do your homework first guys or you are worse than the other guy.
I used to apply it like you did and that very well may be the directions from NGK. Although, the proper way to apply it is a thin coat on the inner and outer boot area just to seal it and insulate the spark.
I would never ever use that much dielectric grease it's a non conductive so spark can't pass through it now use that much what's gonna happen you're right gonna miss
Frankly what he should have done is literally put the dielectric grease on the insulator part of the spark plug That's where it goes you leave the metal contact surfaces alone you don't want it on there if you have a hard-on to put something to make it slip off easier between the two metal surfaces of the spark plug and the boot metal connector use something else that is electrically conductive this stuff isn't really electrically conductive it's meant to be as an insulator One last thing by putting so much of this stuff on like you have done you're going to have a bitching time trying to get that off it's literally going to cause a vacuum effect you think it was bad before trying to get it off now you just caused a bitching problem I know because I've done that I've learned
The friction will scrape away the insulating grease from the electricity conductive contact areas. Plus the secondary ignition is in the temp of thousands of volts, no problem bridging that increased resistance. It when bozos use this stuff on 12V connectors is when things go sideways.
Actually that is a myth. You can in fact, use it (sparingly) on a6, 12, 24, and secondary, and primary ignition systems. It is non conductive and offers zero electrical resistance. Therefore, if the electrical contacts are tight then the grease will be displaced when the contacts are mated and no issues should arise. If they do then the contacts were loose in the first place.
