1996 Honda Civic Dielectric grease on spark plugs

Tiny
MADDERVLAD
  • MEMBER
  • 1996 HONDA CIVIC
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 81,000 MILES
Where exactly is dielectric grease applied on the
spark plug and rubber boot? I know it should NOT
be applied to metal-to-metal mating surfaces.

Is it applied to the ceramic jacket of the plug?
Is it applied to metal surfaces that do not mate,
eg, that part of the plug terminal that does not
contact w/ the plug wire connector, etc?
Do you
have the same problem?
Yes
No
Monday, July 26th, 2010 AT 9:38 AM

5 Replies

Tiny
KHLOW2008
  • EXPERT
Hi maddervlad,

Dielectric grease are used for wire connectors to prevent contaminations and corrosions.

They are seldom used for spark plugs or their wires.
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Monday, July 26th, 2010 AT 10:11 AM
Tiny
MADDERVLAD
  • MEMBER
Hello again.

I've read that dielectric grease is applied to the
non-metal parts of the plug and/or that surface
of the boot (where accessible) that slips over the plug.
And some websites say to put the grease on the
metal terminal as well.

I can understand the use of a non-conductive
material to prevent fusion/adhesion of a non-contact
point as w/ the ceramic jacket vs rubber of the boot
but not of the metal-to-metal contact mating surfaces.
Yet, people say that they do this.

The service manual makes no mention of dielectric
grease although it does rec anti-seize cmpd.
BTW, is a Cu-based anti-seize suitable for spark
plugs or is a higher temp Ni-based cmpd
preferred?

Thank you.
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Monday, July 26th, 2010 AT 10:36 AM
Tiny
KHLOW2008
  • EXPERT
For the service manual, dielectric grease are recommended to be applied to wire connectors only.

Where they are used would depend on preference. Though the manual does not recommend it does not mean that they cannot be used. Personally I have never applied such to spark plugs or wires so I do not know if it is a good idea.

For cmpd a higher temp type would be preferable for the spark plugs.
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Monday, July 26th, 2010 AT 11:22 AM
Tiny
MADDERVLAD
  • MEMBER
Yes, it seems like there is no uniform standard
for using dielectric cmpd. OTOH, if it can prevent
the plug boots from fusing to the ceramic jacket or other parts of the plug, it might be a good idea.
In particular, as it relates to removing the plugs
at some future date and re-using the plug wires.

I see from your profile that you are in Malaysia.
I visited Malaysia a number of yrs ago. Stayed at
the Federal Hotel in Kuala Lumpur. Rode the
express train to Singapore.
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Monday, July 26th, 2010 AT 11:38 AM
Tiny
KHLOW2008
  • EXPERT
Yes, I am from Malaysia.

The Federal Hotel is one of the old landmarks of Kuala Lumpur. Located at one of the golden business district.

Hope you enjoyed your stay then.

You are correct, the grease would help as quite often the plug cables would get stuck if not removed for some time. However Honda have lesser such problem, Toyota and Mitshubishi engines are more prone to sticking.
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Monday, July 26th, 2010 AT 11:57 AM

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