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#33424 - Sat Jun 28 2003 06:17 AM What causes carbon build-up on spark plugs?  
blaiben  Offline
Shop Shark
Joined: Feb 2001
Posts: 277
Leadwood, MO USA
Hello -

I put new spark plugs in my '51 (216) about 2 years ago. I'm ashamed to say that it has only been driven about 20 miles in that 2 year period. (I'll do better!) I have been working on it lately, and I feel that the motor is missing somewhat. I pulled all the plugs, and most are really covered with black carbon, to the point that I don't think they all are firing. I have ordered new plugs and will replace them, but, was just wondering what causes that black buildup, especially considering it has so little running time on it since they were put in new.

THANKS!


Bernard Laiben
1951 3100 Chevy Deluxe Pick-up (original with 73,000 miles on a "straight Six" 216)


#33425 - Sat Jun 28 2003 12:29 PM Re: What causes carbon build-up on spark plugs?  
tclederman  Online
Joined: Sep 2001
Posts: 24,913
Jarvisburg, NC


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 45 years
1954 3104 5-window pickup w/Hydra-Matic
Z-series (54/55) GMC 350 (2-ton) COE
If you have to stomp on your starter, either you, or your starter, or your engine, has a problem.

#33426 - Sat Jun 28 2003 11:00 PM Re: What causes carbon build-up on spark plugs?  
racecarldad  Offline
Member
Joined: Dec 2000
Posts: 137
norton Kansas USA
Black carbon on the spark plugs is usually caused by a very rich mixture of fuel. If this isn't cured it will wash down the cyl. walls and cause it to go to using oil.


kdot em3


Moderated by  53moneypit, Woogeroo 

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