92' 4.3 TBI Timing Marks / Degrees - S-10 Forum
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92' 4.3 TBI Timing Marks / Degrees

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Old 01-04-2011, 03:51 PM   #1
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92' 4.3 TBI Timing Marks / Degrees

The timing marks on my engine are just like the image attached: I am having trouble finding a diagram or book that references the proper 0degree mark on timing marks that look like they do on my truck. Take a look at the image please and let me know if I have the degrees properly referenced for timing to 0 degrees.
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92' 4.3 TBI Timing Marks / Degrees-1.jpg  
Old 01-04-2011, 04:12 PM   #2
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Re: 92' 4.3 TBI Timing Marks / Degrees

Looks good to me. The deepest notch where you have "0" indicated
is just that, "0". The second line on the harmonic balancer is the
one you want to use when the timing interrupt wire is disconnected.

I have a 92 as well.
Old 01-04-2011, 04:19 PM   #3
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Re: 92' 4.3 TBI Timing Marks / Degrees

Yeah I'm pretty sure I have the timing thing down I just needed to make sure what zero actually was since everything is rusted out. Thanx for the reply!
Old 01-04-2011, 04:38 PM   #4
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Re: 92' 4.3 TBI Timing Marks / Degrees

Sorry about that. I didn't mean to infer you didn't. Some have
an issue with the two makes on the balancer. Good luck with
your project !
Old 01-04-2011, 04:48 PM   #5
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Re: 92' 4.3 TBI Timing Marks / Degrees

yep many or most 4,3L balancers have two identical lines on them so watch ouy for that


almost positive the second one around clockwise around it is the TDC #1 firing position one

i forgot again for sure though, its been a while again..


and when you set the actual ign timing unplug the wire or spark module on firewall or intake bracket

set to zero of course
Old 01-05-2011, 12:05 AM   #6
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Re: 92' 4.3 TBI Timing Marks / Degrees

On my 94 there are numbers stamped on that tab, do ya think if you used a wire toothbrush or screwdriver and cleaned up the tab that there might be some on yours.. ?

BTW, the EST wire you need to unplug on the "92 I looked at yesterday was under the passenger floormat all the way up at the top next to the heater box.
A Brown wire with a square black connection to unplug.

Tomorrow I'm going my my pals house who has a clean "92, I'll look at his for ya.

you guys say there are 2 lines on the Harmonic Balancer ?
Can you chalk both and time it with whichever one shows up under the light ?

DrVette
Old 01-05-2011, 11:14 AM   #7
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Re: 92' 4.3 TBI Timing Marks / Degrees

My balancer only has 1 line, however on each rotation of the engine, it can be top dead center or bottom dead center. It has to be set to top dead center, with the pickup pulling from spark plug #1.

You really only need to worry about top dead center if you had the dist pulled out, other wise if you mark the balancer, connect to #1 and pull the advance wire, you should be good to go. I don't think you'll find 2 different marks on the balancer. I have never seen that.
Old 01-05-2011, 06:57 PM   #8
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Re: 92' 4.3 TBI Timing Marks / Degrees

My 88 Astro had 2 marks about 1cm apart IIRC.....
Old 03-25-2012, 07:11 PM   #9
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Re: 92' 4.3 TBI Timing Marks / Degrees

I'm having some serious issues on my 99 Jimmy just built the motors bottom end and it is acting like the timing is out but I followed the book #4 is up timing marks are perfect but when I turn the key the motor is sluggish and doesn't wont to crank any suggestions
Old 03-26-2012, 01:22 PM   #10
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Re: 92' 4.3 TBI Timing Marks / Degrees

#4 is up???
Old 06-09-2013, 08:31 PM   #11
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Re: 92' 4.3 TBI Timing Marks / Degrees

Quote: Originally Posted by jared10130
I'm having some serious issues on my 99 Jimmy just built the motors bottom end and it is acting like the timing is out but I followed the book #4 is up timing marks are perfect but when I turn the key the motor is sluggish and doesn't wont to crank any suggestions
ok so, assuming that you used the hanes manual which suggests you go with #4 at TDC look again it also says that the timing marks on the balancer which should be 2 of them, one is for cyl #1 and one is cyl #4. as for the sluggish crank, make sure that your torque value on your valve rockers is not too high.
Old 06-09-2013, 08:54 PM   #12
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Re: 92' 4.3 TBI Timing Marks / Degrees

Quote: Originally Posted by jared10130
I'm having some serious issues on my 99 Jimmy just built the motors bottom end and it is acting like the timing is out but I followed the book #4 is up timing marks are perfect but when I turn the key the motor is sluggish and doesn't wont to crank any suggestions

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