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  #1  
Old 03-09-2013, 09:53 AM
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danjohnson67 danjohnson67 is offline
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distributor gear destroyed

Well Now for another problem.I installed the new timing cover from BJ's and got it running, it ran fine all week and this morning I made it a mile and then it died. I checked for fuel it was good so I checked timing and I turned it over and the distributor wasnt turning, pulled it and all the teeth were stripped off. This is the original gears, I didn't do anything to them, they had a little wear but no noticable damage to warrant replacement. Any idea what would do this.
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Old 03-09-2013, 09:58 AM
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the original Honcho the original Honcho is offline
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Your can gear is likely chewed up as well. No fun.
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  #3  
Old 03-09-2013, 10:09 AM
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That is a bad feeling. Well, the process of elimination in my mind is that you changed the TC cover. Ummmm...
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Old 03-09-2013, 10:21 AM
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What in the timing cover would make it eat the gears. the cover seemed to fit fine
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  #5  
Old 03-09-2013, 10:28 AM
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serehill serehill is offline
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Good question

It has been rumored the chinese covers do this. I don't know how much fact there is to that becasue I've never used a chinese cover. There have many quality issues called out on this board with them. Maybe someone more experienced with them would know. I do have to say that is really a short time to kill them. Most say it was a month or so.

There's no doubt the cam gear loks the same.
It's usually bamed on the misalignment of the distributor.
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If you can't make it better why waste your time. No use repeating the orignal mistakes. I'm to old to push it that's why.
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  #6  
Old 03-09-2013, 10:32 AM
Ristow Ristow is offline
 
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Quote:
Originally Posted by serehill
I do have to say that is really a short time to kill them. Most say it was a month or so.


a month or so? wouldn't run time have something to do with it.


misalignment of the distributor hole would be the likely culprit.
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  #7  
Old 03-09-2013, 10:41 AM
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serehill serehill is offline
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Yes it would but a week? That thing was chewing the stuffing out of it.

Quote:
Originally Posted by Ristow
a month or so? wouldn't run time have something to do with it.


misalignment of the distributor hole would be the likely culprit.


Of course he may have drove it a thousand miles in that time agreed.
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Holley 4180
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If you can't make it better why waste your time. No use repeating the orignal mistakes. I'm to old to push it that's why.
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  #8  
Old 03-09-2013, 11:01 AM
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Exactly why I recommended a "used" timing cover.
http://www.ifsja.org/forums/vb/showp...9&postcount=12

I'd be getting a full refund on the POS timing cover too.
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  #9  
Old 03-09-2013, 11:54 AM
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I only had put about 150-175 miles on it this week going to work. Has anyone else had any trouble from timing covers from BJ's? Is there anyway to check alignment of the disrtibutor hole to see if its off.
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  #10  
Old 03-09-2013, 12:15 PM
Pair O 79 J10 Pair O 79 J10 is offline
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That would be tough..

I would suspect, if the fault lies with the overseas cover, just a few thousands of an inch out of tolerance would be sufficient to load the distributor gear to the point where lubrication would fail to be sufficient. I have always wondered just how much oil gets sent to the gear, given the small diameter of the passages provide.

As such, you'd be hard pressed to check the cover in the field for an out of tolerance condition.

Hate to hear about this failure, I know it's frustrating at best.

Last edited by Pair O 79 J10 : 03-09-2013 at 12:19 PM.
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  #11  
Old 03-09-2013, 12:32 PM
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Ghinmi Ghinmi is offline
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Classic case of POS new timing cover. There's still plenty of good used timing covers out there and in most cases the original doesn't need to be replaced in the first place. There should be a sticky in BIG BOLD PRINT at the top of every section of this board warning people not to buy the reproduction timing covers. As far as I know, the only way you can get one with any sort of quality control is through Matt at Bulltear, he checks them on a fixture IIRC.
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  #12  
Old 03-09-2013, 12:48 PM
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two big things that will also cause issues is if you don't reuse the alignment dowels on the cover, and if you don't use the gasket under the base of the distributor
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  #13  
Old 03-09-2013, 12:49 PM
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Could possibly be cam walk. The alignment of the shaft through the cover may have nothing to do with it. It can be within spec, but be off enough that the gears won't mesh the same, kind of like taking used gears from one diff and slapping them in another without checking the wear pattern matches. Seizing up oil pump can put too much back pressure too and not lubing the gears after swapping the cover will cause premature wear too.
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  #14  
Old 03-09-2013, 12:59 PM
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I've owned a LOT of Jeeps.

I've mixed and matched OEM covers/distributors/gears many many times and NEVER had a set of gears get munched.

It's been well documented that some replacement covers are junk, and why I would never use one.
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  #15  
Old 03-09-2013, 03:48 PM
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are the bull tear covers cast in china?
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  #16  
Old 03-09-2013, 04:04 PM
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As far as I know, there are only 2 or 3 companies that make them.

I thought the BJ's & Bulltear ones were both made by Crown, and although they had consistency problems in the past, Crown worked with Bulltear to have a tool made to measure & verify each cover was to OE spec.

There shouldn't be any quality issues with those anymore unless it was an old stock, which should have been removed & scrapped.
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  #17  
Old 03-09-2013, 07:12 PM
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danjohnson67 danjohnson67 is offline
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When I installed the cover I did use the alignment pins and there was a gasket under the distributor. The cover that I replaced was a cover that the PO had replaced when he had the motor rebuilt years ago. I haven't gotten it all apart yet but looking down the hole the cam gear looks ok.

Has anyong usedanything like JB Weld tofix cracks in covers? Its cracked under the water pump between the pump and cam. Would it be safe to try somthing like that to reuse the old cover
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  #18  
Old 03-09-2013, 07:25 PM
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Quote:
Originally Posted by billyrb
...and if you don't use the gasket under the base of the distributor
Eek! I just swapped distributors today and forgot to even look for the gasket. Thanks for reminding me. I need to check that before I forget and fire up the engine.
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  #19  
Old 03-09-2013, 07:46 PM
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Has anyone use Omix-ADA distributor drive gear set Part # 17423.03
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  #20  
Old 03-09-2013, 07:57 PM
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I don't need proof of the aftermarket timing covers being crap. Just the rumor is enough to make me stay far away from them.

I've been running a standard Bulltear aluminum cover for 10,000 miles now without an issue, and that's good enough for me. If I had to to it over again, I'd go with their nickel plated cover with an oil pump midplate, the relieved gears, enlarged passages, and a double roller timing chain. best easy durability mods one can do.
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