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07-18-2006, 11:16 AM
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#1 |
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Senior Member
Join Date: Sep 2004
Location: Terrell, TX
Posts: 1,967
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68 panel runnin'!!
We got my buddy's 68 panel running the other day. It bellowed white smoke when it started and kept on smoking quite a bit for awhile. It had been sitting for 3+ years, so we figured that was normal. It's been running now for two weeks and today after bleeding the brakes and installing a new MC, we took her out for a short drive. It's a 350 [010] and has an M-21 tranny behind it.
It runs pretty smooth but still smokes. Is this something the GM top engine cleaner might clear up or is it a valve seal issue? The smoke is white and although it isn't as much as when we first fired it up it's still there. We installed a new 1405 manual choke carb, new wires and plugs [R45TS]. Other than that and new exhaust gaskets, it's not been touched.
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Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps. |
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07-18-2006, 11:44 AM
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#2 |
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67 is sold
Join Date: Apr 2001
Location: Troy, Michigan
Posts: 6,738
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Re: 68 panel runnin'!!
Great feeling isn't it
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07-18-2006, 11:46 AM
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#3 |
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Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: 68 panel runnin'!!
old gas?
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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07-18-2006, 11:46 AM
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#4 |
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Registered User
Join Date: Feb 2005
Location: Bay Area, California
Posts: 995
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Re: 68 panel runnin'!!
pics! I want a panel so bad, but no place to park it
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1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree |
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07-18-2006, 01:20 PM
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#5 |
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Short, Fleet, Slammed, V8 Club
Join Date: Mar 2006
Location: Kingsport,TN
Posts: 450
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Re: 68 panel runnin'!!
Last time I seen one do that it was valve seals.
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07-18-2006, 01:52 PM
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#6 |
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Senior Member
Join Date: Sep 2004
Location: Terrell, TX
Posts: 1,967
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Re: 68 panel runnin'!!
Pics are here on the SBC site....
http://www.southernbowties.com/phpBB...pic.php?t=3054 Someone else said the same thing, Bill....I always thought the smoke was black when it was the seals, but I am no expert by any means. We cleaned out the gas tank and ran all new lines and used new gas, so I know it's not that. The oil got changed out right before he bought it as well.
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Kelly '05 GMC Sierra SLE Z71 Bone stock except for new bed rail caps. |
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07-18-2006, 02:07 PM
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#7 |
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Fat Fendered Fleetside
Join Date: Nov 2004
Location: WPB, S. FL, USA, Earth
Posts: 718
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Re: 68 panel runnin'!!
hmm, white smoke is usually coolant getting into the combustion chambers.
What you can do, is put your hand in front of the smoke/exaust, and then smell the residue on your hand. I know it sounds crazy, but it works, if it's white smoke and smells sweet, it's coolant. if it's white and has little to no smell, then it's usually water in the gas, but you've already addressed that. And if it smells greasy/oily(black smoke) then it's something in your heads(or rings) That's my  |M|
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71 GMC lwb 56 Big window swb 93 GMC Sonoma (dd) radiused fiberglass fender project for 67-72 |
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07-18-2006, 03:41 PM
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#8 |
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Registered User
Join Date: Apr 2002
Location: New Carlisle, Ohio,USA
Posts: 1,404
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Re: 68 panel runnin'!!
White smoke = WATER
Black smoke = FUEL Blue smoke = OIL   
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LIFE AIN'T EASY WHEN YER FAT AND GREASY! GMC= Got More Class!  1970 GMC LWB, Fleetside, 350/4spd, Flowmaster "40's", 2002 GMC 16" Rallies, cowl hood,and added a bunch of options that weren't there when I started. 
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07-18-2006, 06:02 PM
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#9 |
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Old School, New Style
Join Date: Jun 2005
Location: Monroeville, Ohio
Posts: 790
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Re: 68 panel runnin'!!
I second OhioDAn
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The Good: - 72 GMC Jimmy 4x4 - 307 cid / 350 th - 70 Chevy Suburban 1/2T 2wd - 454 cid /400 th - 96 Chevy Impala SS - mainly stock - 98 Chevy Tahoe LT 4x4 - all stock The Bad: - 86 Chevy Suburban 1/2T 4x4 - winter beater The Ugly: - 72 Chevy Suburban 1/2T 2wd - parts truck |
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07-18-2006, 06:15 PM
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#10 |
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The LuvShack Garage
Join Date: Jan 2004
Location: Maple Grove, TN (West Side)
Posts: 30,475
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Re: 68 panel runnin'!!
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