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Ring in the new year with some quality time with your old truck! Now is a great time to tackle a winter project. If you do not have access to your truck, start your parts list for spring!

The days are officially getting longer now, you know!

American Classic Truck Parts still offers a 10% discount to Stovebolters for items in stock.

Keep Warm!

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#33424 - Sat Jun 28 2003 01:17 AM What causes carbon build-up on spark plugs?
blaiben Offline
Shop Shark
Registered: Mon Feb 19 2001 12:00 PM
Posts: 277
Loc: 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)
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#33425 - Sat Jun 28 2003 07:29 AM Re: What causes carbon build-up on spark plugs?
tclederman Offline
Registered: Tue Sep 18 2001 12:00 PM
Posts: 22008
Loc: Castleton-on-Hudson, NY
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#33426 - Sat Jun 28 2003 06:00 PM Re: What causes carbon build-up on spark plugs?
racecarldad Offline
Member
Registered: Fri Dec 15 2000 12:00 PM
Posts: 137
Loc: 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.
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kdot em3
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