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Dielectric grease for Toyota/Lexus coils #4675385
02/23/18 11:11 AM
02/23/18 11:11 AM
Joined: Jun 2013
Posts: 525
Albany, NY
ford46guy Offline OP
ford46guy  Offline OP
Joined: Jun 2013
Posts: 525
Albany, NY
I changed plugs in the Lexus and according to the service manual there is no mention of using any dielectric grease. I know Ford scares you about using it, like you car will explode if you don't. They even have a special product. I didn't use any grease and felt a bit guilty.

I asked a Toyota place on the way to work and a tech said it is not necessary and you are fine. He said the coil seal on the valve cover is more than enough. The coils slid right off the plugs, they must use a high quality rubber. I doubt any grease was used.

What are your opinions?


95 Tbird V8 240K PP SYNTH ULTRA 5W30
98 MGM 160K M1 HM 5W20
96 Explorer EB V6 159K PP SYNTH HM 5W30
95 Conti 155K MC 5W20
11 GS350 90K PP HM 5W30
Re: Dielectric grease for Toyota/Lexus coils [Re: ford46guy] #4675399
02/23/18 11:22 AM
02/23/18 11:22 AM
Joined: Nov 2006
Posts: 20,590
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,590
MA, Mittelfranken.de
In general I use it but on that engine its really not necessary. The boot on the plastic end is not deep and the seal is tight on the cover. Don't loose any sleep over it.


ASE L1, Master. Deutsch Meisterbrief.
Re: Dielectric grease for Toyota/Lexus coils [Re: ford46guy] #4675426
02/23/18 11:53 AM
02/23/18 11:53 AM
Joined: Apr 2013
Posts: 2,423
The Northeast
mclasser Offline
mclasser  Offline
Joined: Apr 2013
Posts: 2,423
The Northeast
Some cars are worse about stuck coils than others. If you're really anal about it, get one of those $1 grease packets near the counter at AZ.


2018 Hyundai Elantra VE -- 6K
2013 Honda Pilot EX-L 4WD -- 57K
2002 Honda Accord EX-L -- 212K

Re: Dielectric grease for Toyota/Lexus coils [Re: ford46guy] #4675440
02/23/18 12:04 PM
02/23/18 12:04 PM
Joined: Jan 2004
Posts: 4,471
California
nthach Offline
nthach  Offline
Joined: Jan 2004
Posts: 4,471
California
I always use it - doesn't hurt or harm anything.

Re: Dielectric grease for Toyota/Lexus coils [Re: ford46guy] #4675468
02/23/18 12:37 PM
02/23/18 12:37 PM
Joined: Jan 2011
Posts: 2,833
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,833
N.Ohio
I use it all the time.


The "thinking" man's friend.
Re: Dielectric grease for Toyota/Lexus coils [Re: mclasser] #4675532
02/23/18 01:25 PM
02/23/18 01:25 PM
Joined: Jun 2013
Posts: 525
Albany, NY
ford46guy Offline OP
ford46guy  Offline OP
Joined: Jun 2013
Posts: 525
Albany, NY
Originally Posted By: mclasser
Some cars are worse about stuck coils than others. If you're really anal about it, get one of those $1 grease packets near the counter at AZ.

Got plenty of it, my concern was more if does more harm than good. Since the manual didn't specify, I didn't put it in. Not a big deal to pop the coils again, but I see it is not really necessary.


95 Tbird V8 240K PP SYNTH ULTRA 5W30
98 MGM 160K M1 HM 5W20
96 Explorer EB V6 159K PP SYNTH HM 5W30
95 Conti 155K MC 5W20
11 GS350 90K PP HM 5W30
Re: Dielectric grease for Toyota/Lexus coils [Re: ford46guy] #4675585
02/23/18 02:17 PM
02/23/18 02:17 PM
Joined: Mar 2014
Posts: 3,478
NJ
Leo99 Offline
Leo99  Offline
Joined: Mar 2014
Posts: 3,478
NJ
I've been using it for about 10 years and found out last year that I've been using it all wrong. So, you could say I've not been using it. Never had a stuck coil or even one that took any effort to remove.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 370,000 miles
2015 Camry 70,000 miles
Re: Dielectric grease for Toyota/Lexus coils [Re: Leo99] #4675597
02/23/18 02:39 PM
02/23/18 02:39 PM
Joined: Jun 2013
Posts: 525
Albany, NY
ford46guy Offline OP
ford46guy  Offline OP
Joined: Jun 2013
Posts: 525
Albany, NY
Originally Posted By: Leo99
I've been using it for about 10 years and found out last year that I've been using it all wrong. So, you could say I've not been using it. Never had a stuck coil or even one that took any effort to remove.

Yes, being "dielectric" it only goes on non conductive surfaces like rubber or ceramic. A very thin coat as well.


95 Tbird V8 240K PP SYNTH ULTRA 5W30
98 MGM 160K M1 HM 5W20
96 Explorer EB V6 159K PP SYNTH HM 5W30
95 Conti 155K MC 5W20
11 GS350 90K PP HM 5W30
Re: Dielectric grease for Toyota/Lexus coils [Re: ford46guy] #4675612
02/23/18 02:56 PM
02/23/18 02:56 PM
Joined: Mar 2014
Posts: 3,478
NJ
Leo99 Offline
Leo99  Offline
Joined: Mar 2014
Posts: 3,478
NJ
Originally Posted By: ford46guy
Originally Posted By: Leo99
I've been using it for about 10 years and found out last year that I've been using it all wrong. So, you could say I've not been using it. Never had a stuck coil or even one that took any effort to remove.

Yes, being "dielectric" it only goes on non conductive surfaces like rubber or ceramic. A very thin coat as well.


I've been sticking it on the spark plug terminals.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 370,000 miles
2015 Camry 70,000 miles
Re: Dielectric grease for Toyota/Lexus coils [Re: ford46guy] #4675759
02/23/18 06:20 PM
02/23/18 06:20 PM
Joined: May 2010
Posts: 291
Alaska
AlaskaMike Offline
AlaskaMike  Offline
Joined: May 2010
Posts: 291
Alaska
Originally Posted By: ford46guy

Yes, being "dielectric" it only goes on non conductive surfaces like rubber or ceramic. A very thin coat as well.


Actually this is a common misconception. While it's normally only recommended for inside the rubber boots when used on spark plug wires, in pretty much every other electrical application it's always used on the conductive surfaces. In RF (radio) applications it's frequently used to fill coax connectors before they're threaded together for example.

In low voltage applications like trailer towing harness connectors, it's excellent for keeping moisture out of the connections. I've also seen it used in high voltage DC applications as well.

I use the stuff in any electrical connection that might be exposed to moisture, whether rain, condensation, or any other source.



Last edited by AlaskaMike; 02/23/18 06:21 PM.
Re: Dielectric grease for Toyota/Lexus coils [Re: ford46guy] #4676548
02/24/18 01:53 PM
02/24/18 01:53 PM
Joined: Nov 2006
Posts: 20,590
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,590
MA, Mittelfranken.de
Originally Posted By: ford46guy
Originally Posted By: Leo99
I've been using it for about 10 years and found out last year that I've been using it all wrong. So, you could say I've not been using it. Never had a stuck coil or even one that took any effort to remove.

Yes, being "dielectric" it only goes on non conductive surfaces like rubber or ceramic. A very thin coat as well.


No, you can put it on everything with it, I get some marine injectors that have the electrical connector packed full of it.
This is the boot he is talking about, it looks like a poly material and not very long.



As opposed to this rubber one that tends to stick to the plug or tear.



ASE L1, Master. Deutsch Meisterbrief.
Re: Dielectric grease for Toyota/Lexus coils [Re: Trav] #4676661
02/24/18 03:27 PM
02/24/18 03:27 PM
Joined: Jun 2013
Posts: 525
Albany, NY
ford46guy Offline OP
ford46guy  Offline OP
Joined: Jun 2013
Posts: 525
Albany, NY
Originally Posted By: Trav
Originally Posted By: ford46guy
Originally Posted By: Leo99
I've been using it for about 10 years and found out last year that I've been using it all wrong. So, you could say I've not been using it. Never had a stuck coil or even one that took any effort to remove.

Yes, being "dielectric" it only goes on non conductive surfaces like rubber or ceramic. A very thin coat as well.


No, you can put it on everything with it, I get some marine injectors that have the electrical connector packed full of it.
This is the boot he is talking about, it looks like a poly material and not very long.



As opposed to this rubber one that tends to stick to the plug or tear.




Ford markets a special "low voltage terminal" grease that is different from the dielectric compound.


95 Tbird V8 240K PP SYNTH ULTRA 5W30
98 MGM 160K M1 HM 5W20
96 Explorer EB V6 159K PP SYNTH HM 5W30
95 Conti 155K MC 5W20
11 GS350 90K PP HM 5W30
Re: Dielectric grease for Toyota/Lexus coils [Re: ford46guy] #4676700
02/24/18 04:02 PM
02/24/18 04:02 PM
Joined: Nov 2006
Posts: 20,590
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,590
MA, Mittelfranken.de
I guess their terminals are different from all the other makes. LOL There are different bulb and socket grease and Ox-Gard but I cant see any difference in performance.
It wouldn't surprise me if they had a super trunk latch spring lube made with black unicorn tears.


ASE L1, Master. Deutsch Meisterbrief.
Re: Dielectric grease for Toyota/Lexus coils [Re: ford46guy] #4677049
02/24/18 09:55 PM
02/24/18 09:55 PM
Joined: May 2004
Posts: 10,597
Nokesville, VA
brianl703 Offline
brianl703  Offline
Joined: May 2004
Posts: 10,597
Nokesville, VA
Originally Posted By: ford46guy


Ford markets a special "low voltage terminal" grease that is different from the dielectric compound.


The Ford grease is actually Nyogel 760G:


Re: Dielectric grease for Toyota/Lexus coils [Re: brianl703] #4677201
02/25/18 03:44 AM
02/25/18 03:44 AM
Joined: Nov 2006
Posts: 20,590
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,590
MA, Mittelfranken.de
From the description it sounds similar or may be even the same as Ox-Gard. Good for pre weather pack connectors where the wire going into the terminals are exposed and subject to corrosion.


ASE L1, Master. Deutsch Meisterbrief.
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