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Old 06-26-2008, 11:31 AM
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Need help with timing chain

I have a 67 chevelle with a 327 that I bought recently.
The motor was recently rebuilt and a gear drive was put in which I can't stand to listen to. I bought a new cloyes timing chain setup and took the front of the motor apart this morning. Before taking it apart I brought the motor to TDC, checked the distributor and rotor was pointing at #1
Once I got the timing cover off, the crank gear was pointing up and the cam gear was also pointing up (opposite of the crank gear) now with the new timing chain on and the marks lined up the rotor is pointing towards the firewall, opposite from #1 ??? I don't want too close it up until I'm sure it's setup right. any advice would be appreciated.
Thanks

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Old 06-26-2008, 11:38 AM
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Yeah, you have got it right, but you will need to take the distributor out and turn it 180 degrees otherwise the distributor will be firing at TDC on the EXHAUST stroke.

Or you could take the timing chain back off and line up the marks the way the directions say (marks facing each other crankdot up and cam dot down) and if it is still pointing at the #6 post on the cap then you are good to go.

The distributor timing has nothing to do with the cam timing so what you should do is take the distributor out. install the timing set the way the directions state (like I outlined above) and then find TDC on the compression stroke on #1, then drop your distributor in with the rotor pointing at the #1 post on the cap.
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Old 06-26-2008, 11:42 AM
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Thanks for the quick reply double V, could it be that the last person put it in 180 out ?? because if I line it up the way it was when I took it apart (cam gear pointing up) the rotor point to #1
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Old 06-26-2008, 11:51 AM
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Ooops, I thought you installed it with the cam gear pointing up as well. If the dot is at 12 oclock on the cam gear the rotor should be pointing at #1.

If you have the dots pointing toward each other and it is at #6 then you have it right.
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Old 06-26-2008, 11:52 AM
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Install the sprockets and chain with the marks aligned, 12 oclock on the crank gear and 6 oclock on the cam gear. The rotor will be pointing to #6 and that's ok. Button it up and fire it. Trying to install the gears and chain with the cam gear at 12 oclock so that the rotor points to #1 is difficult unless you're real careful and use a straightedge.

Last edited by techinspector1; 06-26-2008 at 11:57 AM.
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Old 06-26-2008, 11:55 AM
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ok...that's how it is right now. thank very much guys.
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Old 06-26-2008, 03:00 PM
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Quote:
Originally Posted by super_silent
I have a 67 chevelle with a 327 that I bought recently.
The motor was recently rebuilt and a gear drive was put in which I can't stand to listen to. I bought a new cloyes timing chain setup and took the front of the motor apart this morning. Before taking it apart I brought the motor to TDC, checked the distributor and rotor was pointing at #1
Once I got the timing cover off, the crank gear was pointing up and the cam gear was also pointing up (opposite of the crank gear) now with the new timing chain on and the marks lined up the rotor is pointing towards the firewall, opposite from #1 ??? I don't want too close it up until I'm sure it's setup right. any advice would be appreciated.
Thanks
You moved the cam didn't you. When the SBC's timing marks face each other the engine is set to fire number 6 which is what you're seeing. One complete rotation of the crank in the clockwise direction looking from the front will bring both timing marks to the 12 o'clock position and the distributor back to the #1 firing posiiton.

Bogie
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Old 06-26-2008, 03:04 PM
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I turned the cam gear so that it was at 6 oclock (it was set at 12:00) and the crank gear was at 12 and just finished it up....everything is working perfectly.....and no more irritating whine from the gear drive !
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Old 06-27-2008, 02:32 AM
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If you do find yourself 180* out, you don't have to remove the distributor. Just move each plug wire to the position directly opposite it on the cap, and you're in business.
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