My Spark Plugs Tips Have a White Residue....why?

[skizm]

Anyone know what causes plugs to burn white?

Please email

thanks

[Sami Pesu]

skizm <sk...@erols.com> kirjoitettu:

> Anyone know what causes plugs to burn white?
>
>
> Please email
>
> thanks
>

Your fuel/air mixture is too lean.Too much air,not enought fuel,dangerous
to sylinders and pistons.
Rgds Turbo Sami

[skizm]

Thanks for your response, but i was thinking it was running very rich. In
fact if I stick my nose up to the tail pipe I can smell fuel. I am also
getting a whitish smoke out the tail pipe.

[Sami Pesu]

skizm <sk...@erols.com> kirjoitettu:

> Thanks for your response, but i was thinking it was running very rich. In
> fact if I stick my nose up to the tail pipe I can smell fuel. I am also
> getting a whitish smoke out the tail pipe.
>

When you have rich mixture,smoke is black.white smoke and white tailpipe is ok
Try check colour of plugs so that you drive in higway fast few minutes and
then stop car ( no idle) ,and take plug or plugs out, white is too lean,black is
rich,betveen ok.

[Chris Wilson]

On 9 Nov 1996 00:34:51 GMT skizm <sk...@erols.com> apparently said in
rec.autos.sport.tech:

> Thanks for your response, but i was thinking it was running very rich. In
> fact if I stick my nose up to the tail pipe I can smell fuel. I am also
> getting a whitish smoke out the tail pipe.

I *thought* you meant a build up of deposits,not just a colouration.If I
understand you correctly,a build up of whitish *deposits* (as in lumps) is
usually caused by oil finding its way into the combustion chamber,due to bore
/ ring wear, ring sealing problems caused by incorrect bedding,or worn
guides,or leaky stem seals.

White exhaust smoke is often caused by brake fluid getting into the intake
via a leaking master cylinder filling the brake vacuum servo to the level of
the intake vac feed,and fluid getting burnt.This may well cause deposits...

--

Chris Wilson Sat, 09 Nov 1996 17:30 GMT
Gatesgarth Racing Developments
Gatley,Cheshire,U.K.
Race Car Preparation and Development
http://195.102.33.46/~gategart
mailto:ch...@gategart.u-net.com

[Cord M. Christensen]

: White exhaust smoke is often caused by brake fluid getting into the intake

: via a leaking master cylinder filling the brake vacuum servo to the level of
: the intake vac feed,and fluid getting burnt.This may well cause deposits...

:
: Chris Wilson Sat, 09 Nov 1996 17:30 GMT

Hmmm, never heard of the above happening, but if you are getting
white smoke from the tailpipe even after the car is warmed up (or especially
after the car is warmed up) I would suspect a head gasket or cracked cylinder
head/block. White smoke can be caused by the water/anitfreeze mixture being
forced into the cylider somewhere. Take a look in your radiator. If you
see a milky colored mixture in there or small drops of brown or black liquid
floating in there it could indicate a bad head gasket or a crack in a cyilinder.

Cord.

Cord Christensen cchr...@mtu.edu 343W WWH
Engine Group (906) 487-0547 1703 Townsend Dr.
Blizzard Racing Houghton, MI 49931

[skizm]

Thanks for the response..
Actually I do have a white residue on the plugs, but not lumpy, just an
even white ashy residue. I dont think I have a leaky master cylinder, but
I did need to replace a leaky wheel cylinder yesterday. What about
anti-freeze from a bad head gasket will that cause a white smoke and
white plug residue?

Thanks

[funkraum]

>Chris Wilson <ch...@gategart.u-net.com> wrote:
[...]

>I *thought* you meant a build up of deposits,not just a colouration.If I
>understand you correctly,a build up of whitish *deposits* (as in lumps) is
>usually caused by oil finding its way into the combustion chamber,due to bore
>/ ring wear, ring sealing problems caused by incorrect bedding,or worn
>guides,or leaky stem seals.
>

OK, is this the 'ash' that comes from the additives that
road-going oils contain to prevent oxidation and is it the very
ash which isn`t present in ash

[funkraum]

d...@fen168.demon.co.uk (funkraum) wrote:

... in ashless racing oils ?

[Don`t know what happened there.]

[Chris Wilson]

On Thu, 28 Nov 1996 00:07:48 GMT d...@fen168.demon.co.uk (funkraum) apparently
said in rec.autos.sport.tech:

> .... in ashless racing oils ?

>
>
> [Don`t know what happened there.]
>

All oils produce some deposits.Aircraft piton engine oils tend to be "ash
free".Uncontrolled admission of any oils to the combustion chamber will cause
plug deposits.
My knowledge of lubrication chemistry is virtually nil,so I can't be too
specific here,sorry.I do know that even an "ashless" oil will cause *some*
deposits if it is entering the combustion chamber in excessive amounts..

--

Chris Wilson Thu, 28 Nov 1996 21:49 GMT