To dieletric grease or not to, that is the question
Thread Starter
TECH Addict
Joined: Apr 2002
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From: Waldwick, NJ
To dieletric grease or not to, that is the question I've read 2 install writeups for spark plug installs.
1 of them said to use dielectric grease on the new plugs and wires and the other didn't even mention it.
Do I need to do this?
1 of them said to use dielectric grease on the new plugs and wires and the other didn't even mention it.
Do I need to do this?
Re: To dieletric grease or not to, that is the question Use DEG. on the plug to wire terminal, this helps keep it from breaking off from heat failure. Absolutely no problems. Use anti-seize on the threaded ends of the plug...not on the ground strap or center electrode, just some on the threads to help with removal later.
Re: To dieletric grease or not to, that is the question + not to mention it helps cut down RFI(radio freqency interferance)
This is the noise/voltage an ignition system can "induce" into other circuits.
Like the low volt PCM circuits.
Have had alot of funky problems on car's that was RFI.
This is the noise/voltage an ignition system can "induce" into other circuits.
Like the low volt PCM circuits.
Have had alot of funky problems on car's that was RFI.
Re: To dieletric grease or not to, that is the question i dont use dielectric grease or anti seize and i never have any problems
but then again i cahnge my plugs every oil change (yes i know its overkill, but its one less thing on my mind)
but then again i cahnge my plugs every oil change (yes i know its overkill, but its one less thing on my mind)
Launching!
Joined: Apr 2003
Posts: 272
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From: Cincinnati, Ohio
Re: To dieletric grease or not to, that is the question Anti-seize on the plugs is a no-brainer. You're working with aluminum here, and galling happens more easily than you think. Cheap insurance. Just because you "haven't had trouble yet" doesn't make a good argument for not doing it the right way to make sure you never have trouble.
Dielectric gel is a good safeguard too. It prevents corrosion and ensures the connection between your coil and your plug doesn't degrade over time. Besides that, I've broken a TON more plug wires over the years that didn't slip off nice and easy because there was no gel lubricating them than I ever have when the gel was used.
Wrencher - DEG cuts back on RFI? I've never heard this.. Electrically speaking, that makes not sense to me at all. I mean, how does a non-conductive gel affect attenuation or circuit bleed? can you explain?
Dielectric gel is a good safeguard too. It prevents corrosion and ensures the connection between your coil and your plug doesn't degrade over time. Besides that, I've broken a TON more plug wires over the years that didn't slip off nice and easy because there was no gel lubricating them than I ever have when the gel was used.
Wrencher - DEG cuts back on RFI? I've never heard this.. Electrically speaking, that makes not sense to me at all. I mean, how does a non-conductive gel affect attenuation or circuit bleed? can you explain?
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Thread Starter
TECH Addict
Joined: Apr 2002
Posts: 2,417
Likes: 0
From: Waldwick, NJ
Re: To dieletric grease or not to, that is the question Anyone know where I can pick up anti-seize. I went to home depot yesterday and asked if they had it and they looked at me like I had 10 heads....And I asked 6 employees....
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Re: To dieletric grease or not to, that is the question [quote]
Wrencher - DEG cuts back on RFI? I've never heard this.. Electrically speaking, that makes not sense to me at all. I mean, how does a non-conductive gel affect attenuation or circuit bleed? can you explain? [/quote
It acts as a seal between plug & wire. The CNP ignition system of a LS1 is capable of generating in the excess of 80,000 volts. But normally only runs at 12 to 20K.
Most PCM sensors are 5 volt referance based & O2's are a single volt circuit.
It is not difficult for stray ign. system voltage to find it's way into other circuits.
This extra voltage can confuse PCM & cause problems.
The type of problems they cause are very diff.& hard to diagnois.
I have seen it b-4 monitoring cam sensor, a knock sensor & others with a digital storage lab scope. It shows up as noise on the circuits waveform/trace/pulse train.
Just DEG alone had made the problem go away in some cases.
I'm a GM tech & is is even taught in seminars etc.
Delco wires come with a small packet of DEG w/ the wire set.
This is something that alot of cars are supseptable to.
Wrencher - DEG cuts back on RFI? I've never heard this.. Electrically speaking, that makes not sense to me at all. I mean, how does a non-conductive gel affect attenuation or circuit bleed? can you explain? [/quote
It acts as a seal between plug & wire. The CNP ignition system of a LS1 is capable of generating in the excess of 80,000 volts. But normally only runs at 12 to 20K.
Most PCM sensors are 5 volt referance based & O2's are a single volt circuit.
It is not difficult for stray ign. system voltage to find it's way into other circuits.
This extra voltage can confuse PCM & cause problems.
The type of problems they cause are very diff.& hard to diagnois.
I have seen it b-4 monitoring cam sensor, a knock sensor & others with a digital storage lab scope. It shows up as noise on the circuits waveform/trace/pulse train.
Just DEG alone had made the problem go away in some cases.
I'm a GM tech & is is even taught in seminars etc.
Delco wires come with a small packet of DEG w/ the wire set.
This is something that alot of cars are supseptable to.
