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03-17-2008, 08:43 AM
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#1 |
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Registered User
Join Date: Jan 2007
Location: Garland,TX
Posts: 431
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quick timing question
tdc #1, should the cam gear be at 6 o'clock or 12 o'clock?
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03-17-2008, 09:44 AM
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#2 |
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Gone to greener pastures
 Join Date: May 2007
Location: Gateway to the Delta
Posts: 7,354
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Re: quick timing question
I'm assuming you have the front off the motor, & it's a V-8.
The index mark on the cam shaft (big) sprocket should be @ 6 o'clock, & the index for the crank sprocket should be @ 12 o'clock. There should be an imaginary vertical line from the center of the cam to the center of the crank that passes through both indices. I hope this helps you. El Jay
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'69 Chevy 1/2 T LWB Stepper: Daily Beater '72 GMC 3/4 T Fleet: Another Daily Beater '72 Plymouth Gran Coupe: ? "Ah women. They make the highs higher and the lows more frequent." Friedrich Nietzsche "Never kick a fresh turd on a hot day." Harry S. Truman GUN CONTROL: Never having to say, "I missed you." Always fire two warning shots into your attacker's chest area before putting a bullet between his eyes. Paraphrased from Louis Awerbuck |
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03-17-2008, 09:54 AM
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#3 |
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1972 Chevrolet SWB
Join Date: Jan 2008
Location: FT Smith AR
Posts: 512
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Re: quick timing question
Also the crank keyway should be facing imaginary 2 o'clockfor top dead center.
Here is an illustration (disregard the "hemi" parts) 
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My New thread with pics (not my build thread yet.)  http://67-72chevytrucks.com/vboard/s...46#post2573646 1972 Chevrolet 1/2 ton short wide bed,68 frt clip Project. 1980 Camaro Inherited when father passed,68K Miles 2003 Ford Mach1 FUN as Hell!! 2002 Dodge Ram 5-8 slam Rolling BillBoard (Gone not forgot) 2004 Dodge Ram HEMI 10" lifted on 37's and 2wd. |
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03-17-2008, 09:55 AM
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#4 |
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Registered User
Join Date: Jan 2007
Location: Garland,TX
Posts: 431
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Re: quick timing question
thats what i thought, but i saw a write up on here on changing a cam. on there the guy said tdc #1 was with both marks on the sprockets pointing towards 12 o'clock. got me a little confused. thanks for clearing it up.
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03-17-2008, 09:58 AM
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#5 |
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Registered User
Join Date: Jan 2007
Location: Garland,TX
Posts: 431
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Re: quick timing question
finally got everything put back together, but hadnt fired it up. then i saw that and i was like oh oh, i really hope he's wrong.
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03-17-2008, 10:12 AM
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#6 |
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1972 Chevrolet SWB
Join Date: Jan 2008
Location: FT Smith AR
Posts: 512
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Re: quick timing question
from SuperChevy,the black arrows point to the dowels on the crank and cam in relation to marks.
http://images.superchevy.com/technic..._and_chain.jpg
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My New thread with pics (not my build thread yet.) http://67-72chevytrucks.com/vboard/s...46#post2573646 1972 Chevrolet 1/2 ton short wide bed,68 frt clip Project. 1980 Camaro Inherited when father passed,68K Miles 2003 Ford Mach1 FUN as Hell!! 2002 Dodge Ram 5-8 slam Rolling BillBoard (Gone not forgot) 2004 Dodge Ram HEMI 10" lifted on 37's and 2wd. Last edited by slammed1; 03-17-2008 at 10:18 AM. |
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