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Old 03-08-2012, 01:00 PM   #1
wherewasi's Avatar
Join Date: Oct 2011
Posts: 52
Timing-Gen'l Question

Hello all,

I'm trying to learn... please be patient with me...

When it is said that a vehicles' timing is, say, 20 degrees BTDC... where are the 20 degrees measured from? Are they part of the 360 degree rotation of the distributor?


Just got my YJ...doesn't run yet and it's covered up for the winter. Makes my day just seeing it in my driveway, though....
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Old 03-08-2012, 03:29 PM   #2
Join Date: Aug 2011
Location: north of St.Franisville La.
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Look at the Harmonic Balance on the front of the Crank Shaft it should have a line on it for TDC and there should be a scale on the Cam cover, or it could be the other way around I do remember with go to the shop to see, thats where you read the timing, set it with the vac. line off of the Dizzy, then reconnect the line after setting the timing. as you accelerate the timing should advance, watch the scale and see that it does. hope this was clear I not good at explaining things I do all the time.

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Old 03-08-2012, 05:30 PM   #3
Join Date: Jan 2010
Location: Las Cruces, NM
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Don't forget to plug the vacuum line when you disconnect it.
(Sold)1994 Jeep Wrangler 2.5L, Bestop top
/w steel half door and slider windows
5 speed, 2.5" lift, 31" tires,rack lights
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