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Unread 08-26-2013, 05:13 PM   #1
jennkent5454
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what is the proper way to set timing on a 1979 cj5 with a 258

I want to check and adjust the timing on my 1979 258, carter BBD, team rush upgrade. Im looking for the correct steps to get it done. how to get TDC and being sure what stroke its on. and what setting the timing should be at, and does it have to be up to temp first?, and, and, and!!!

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Unread 08-26-2013, 09:24 PM   #2
fourbtgait
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Under search in cj forum, type in "finding top dead center or TDC" by Shawn.
It is easy to do to verify your balancer is correct, then go from there.

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Unread 08-27-2013, 12:13 AM   #3
BagusJeep
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Timing can be done cold or hot, at idle with the vacuum advance unplugged. A timing light is needed and you may find good results wih 8 degrees BTDC. Slacken the distributor retianining bolt and turn it until you get 8 degrees on the timing light.

However you may then think that you could do more........... and this is when you will need the Forum. There are threads on here of great complexity and length about measuring, setting up and getting the most from the timing curve.

You will rapidly descend into a world of graphs, tachs, capsules and flips as you search for that elusive perfect curve.
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Unread 08-27-2013, 06:37 AM   #4
2Xtreme
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Quote:
Originally Posted by BagusJeep View Post
...You will rapidly descend into a world of graphs, tachs, capsules and flips as you search for that elusive perfect curve.
and down the rabbit hole you will go..........

It CAN get very complex. But the process itself very simple.
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Unread 08-27-2013, 06:38 AM   #5
2Xtreme
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Quote:
Originally Posted by fourbtgait View Post
Under search in cj forum, type in "finding top dead center or TDC" by Shawn.
It is easy to do to verify your balancer is correct, then go from there.
^^ This
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Unread 08-27-2013, 09:38 AM   #6
jennkent5454
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So do I need to find TDC before I put a light on it? Or can I just put the light on it and set it to 8*?
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Unread 08-27-2013, 09:46 AM   #7
Matt1981CJ7
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The reason for finding TDC is to confirm the timing marks jive. When the engine is at TDC the mark should be sitting at zero. If it's not, then the timing chain has stretched, perhaps even jumped a tooth, giving you inaccurate readings with light.

Good luck,

Matt
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