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Vince Ponz · Joined: 02 Nov 2002 Posts: 3581 Location: Florida

Those of you running carbs and a cam what plugs are you using?
I was blowing white smoke and we removed the head and nothing is wrong. Plugs were white..........too hot?

help.
_________________
"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

Smoothie · Posted: Mon Sep 17, 2007 2:15 am Post subject:

Yellow-tan color and glazed insulator indicate too-hot.
White with minimal deposits is normal.
Excessive white deposits can be oil leaking past rings or valve seals, or too-thin oil viscosity.
Have a look, see - http://www.spark-plugs.co.uk/pages/technical/diagnosis.htm
http://www.mopar.com/m_maint_inspection_plugs_tune.html
_________________
"..it's made in Germany. You know the Germans always make good stuff."

'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox

Vince Ponz · Joined: 02 Nov 2002 Posts: 3581 Location: Florida

So far we removed the head and the gasket is fine and no leaks. I drained the gas as I had some race fuel in it and think maybe this was it. I will change the plugs.

Any other guesses.
_________________
"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

leadfoot · Posted: Thu Sep 20, 2007 2:38 pm Post subject:

normally burning coolant is white
oil burning has a bluish tinge... sure of the color ??

with the higher octane were you running different timing??
unburnt fuel would still come out black...

more likely a cracked block or leaky head... possible the valve stem seals are starting wearing out...
Leadfoot
_________________
1981 ROW 924 Turbo -
carbon fiber GT mish mash
LS1 conversion in progress...

Vince Ponz · Joined: 02 Nov 2002 Posts: 3581 Location: Florida

It was a very small failure in the head gasket.
_________________
"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock