Cam shaft gear bad or good? -
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post #1 of 4 Old 07-11-2013, 02:25 PM Thread Starter
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1989 YJ Wrangler 
Join Date: Oct 2012
Location: Bellingham
Posts: 121
Cam shaft gear bad or good?

i6 258 in an 89. bought jeep nuttered and running on a 73[I think ] d-remy points dizzy.Various reasons to get rid of that distributor and so I bought a DUI.
Started to install the unit today and peeked into the engine block to inspect the gear on the shaft.No metal shavings or anything, either there or in the oil pan bottom, however the gear looked to be worn. I have zero knowledge on this sort of thing but toward the rear <--- of the gear the teeth ends seem to be more of a v than a u shape like they are in the middle and rest of the assembly.
I then checked the dizzy gear and found slight corresponding wear marks, however the dizzy is only slightly worn whereas the camshaft gear edges seem to be like a 50 degree inclusive bevel.
My fear is that someone may have used a hardened dizzy gear on the motor at one point and then when they sold it threw a points dizzy on instead.
The motor has VERY few miles on it and I guess my question is how does one know exactly when that camshaft gear is dun for?
Obviously I don't wanna throw that DUI on a bad camshaft gear but I just don't know if it is any good or not.Does anyone have a picture of what a bad one looks like or what a good one looks like for that matter?I need to know if im gonna need to replace that camshaft or if ill be ok.

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post #2 of 4 Old 07-11-2013, 03:59 PM
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1988 XJ Cherokee 
Join Date: Jun 2010
Location: Des Moines
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If you can insert the distributor and there is little to no gear lash I would run it and never look back. This gear interchange is not a high stress or wear point.

89 Wrangler - Sent to part out heaven.
88 Cherokee - Exocage, 4.0, 8.8, 4.88, 6.5 lift, 33's.
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post #3 of 4 Old 07-11-2013, 04:38 PM
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1987 YJ Wrangler 
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Location: west palm beach fl
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the gear should have a flat spot on the edge not a sharp point but from your post it sounds like only part of it is worn. like already posted check the lash, install the distributor and gently turn the rotor back and forth, you should be able to feel when it makes contact. if there is little to no play you should be ok.

Do everything with a positive attitude, it won't always work but you'll piss enough people off to make it worthwhile.

the voices aren't real but they sure have good ideas.
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post #4 of 4 Old 07-13-2013, 09:17 AM Thread Starter
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1989 YJ Wrangler 
Join Date: Oct 2012
Location: Bellingham
Posts: 121
False alarm!..

Thanx for the replys but I havnt got the problem anymore.

It is amazing how shapes and edges at the bottom of a hole look different after you flood them with 210 lumens instead of a crappy failing flashlight...

Note to others:dont use a crappy failing flashlight...

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