1980 Jeep CJ5


Badger Girl

October, 18, 2010 AT 4:00 PM

Engine Performance problem
1980 Jeep CJ5 6 cyl Four Wheel Drive Manual 79000 miles

I have a 258 motor and I need to know where to set the timing. I see numerous indicator marks and a circle tube after the last mark. What is the recommended advance setting?


5 Answers



October, 18, 2010 AT 6:23 PM

See my profile,

Looks like the numbers are:

8 Degrees BTDC (Before Top Dead Center) 49 States

6 Degrees BTDC if you have a California Rig!

At 700 RPM, Vacuum Advance Removed and plugged off of the distributor......during procedure!

I do not know your situation, but if you would like some Nit-Picky Instructions...Or Tips

Read thru the link below, It may help you....Timing is probably on page 2 of this answer


I will assist you with any CJ problem, just keep replying below (Reply to Question)

I will hang with you as long as it takes to fix all of your stuff!

This is my hobby, and very few CJ come thru often (they have fewer problems).....So let me help you please

Let me know how you fare

Your Turn

The Medic


Badger Girl

October, 20, 2010 AT 10:56 AM

8 degrees btdc is what I needed thanks, however how do I know which hash mark is tdc? There is no indication on the motor just a series of marks and after the last hash mark moving clockwise a circular tube.



October, 20, 2010 AT 3:53 PM

Did You READ THIS POST?---Especially PAGE 2 (Click on the blue writing below, then find page 2....Explained in great detail!

I have 2 pics there, similar to the one further down, this fellers timing is "9 DEGREES BTDC" You will see the Final Mark, he is to time to on pg.2 of the link I providedPLEASE READ IT!!!!!!!


Heres TDC (White mark on harmonic balancer is DEAD ON TDC!!!).......Above "0", Is BTDC (Before Top Dead Center)....................Below "0" is ATDC (one mark, 2 Degrees AFTC)


Your Turn

Hows it coming?

The Medic


Badger Girl

October, 21, 2010 AT 6:40 AM

This is the answer I needed picture is perfect. Now I have to figure how to read rpms (to get to 700) with out a tachometer.



October, 21, 2010 AT 7:37 AM


I will be at my Dads till about 15:00 Eastern Today, Thats 3:oo PM For all you civilian types out there!

Please get yourself a Tach, You will need it later anyway!!!!

Even better is the kit I described in the post I linked you to, from HARBOR FRIEGHT, NOT VERY EXPENSIVE, EVERYTHING YOU NEED!!! Its in a nice SMALL, COMPACT CASE TOO!!!!


DID YOU READ THE POST, IN ITS ENTIRITY, BADGER GIRL????..........You can also just look in the CJ 5 & 7 Forums for other SPECTACTULAR ANSWERS I HAVE GIVEN!!!

You can also get the tach at Autozone or Advance Auto.......Cheap.....But probably all by itself.

Timing with the RPMs too high, you will not get an accurrate setting.....cause the Centrifical Advance or Mechanical Advance will be operating (Throwing Out) and giving you a false reading for base timing.

DO IT RIGHT GIRL, IF YOU ARE GONNA DO IT AT ALL!..........You ain't from one of those Yankee States are you????? Haaaaaa!!!

Now that you got some help......Use it correctly, sorta a like me giving your "Baby" A Prescription!

This time, if CJ MEDEVAC, is making sense, and you "Getter Done", Remember to make me look good in "FEEDBACK"......better than the others did ("Votes")

Whatever you doBE CAREFUL!!!--Watch that fan!!!

Remember, Now that you see how THOROUGH and GOOD I am......I will send you a "PM" (Private Message, look for it!) S that you will be giving the opportunity of leaving me your E-Mail Address, so that you can have the PRIVELEGE of seeing my CJ Mechanical Modifications and More!

Your Turn

The Medic

These are my Current 2

"MR. JEEP" and "WILLY".........I've Had 7, Total, never had a car!







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