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Unread 04-25-2012, 12:21 PM   #3061
willydigger
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Quote:
Originally Posted by CoveBikr View Post
going to do the switch right after work. pulled the cover and have the holes aligned right now. very worried what i will find. there was actually dirt/dust under the cover.... doesn't seem like that is a good thing..

going to loosen it up and pull it in about 45 min.
You're fortunate to have removed the cover in one piece. I had an OPDA cover bolt seize and pull the threads out with it. Turned out to be the hardest part of the swap.

The design of the gear mesh is a high wear type anyway. The design of the OPDA gear is supposed to use a less hardened steel so that if the mesh is poor or there is wear, it will wear the weaker (easier to replace) OPDA gear.

Just because the OPDA gear is razor thin and mangled doesn't necessarily mean the camshaft gear will be the same. When you look in the engine at the camshaft gear, you want to look for the meat of the tooth. How thick is it? There will be surface wear and there will be wear on the tips/edges, but it's the center of the tooth you want to look at. If it's thin, than your camshaft gear is ruined and you're on borrowed time.

Here is a repost of the gear area. Both of these gears have wear and edges on the ends, but they still have a thick tooth. It's hard to tell with the lower pic, but you'll see it when you have yours out. I could see mine clearly when I pulled it, but it had the "stone washed" wear spot like the above pic.





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Unread 04-25-2012, 12:57 PM   #3062
CoveBikr
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have it out... some wear on gear... will post pics... problem is that the gasket is broken between the assembly and the block. now what... can't drive it, opda is out... autoparts store have this?
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Unread 04-25-2012, 01:03 PM   #3063
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Quote:
Originally Posted by CoveBikr View Post
have it out... some wear on gear... will post pics... problem is that the gasket is broken between the assembly and the block. now what... can't drive it, opda is out... autoparts store have this?
Scrape the remaining gasket off. You can try the local auto parts store. If they don't stock it add a bit of silicone instead. It will leak a little without a seal, but nothing major. You can put in the new one and drive to the parts store. The PN for the gasket is J3181288. If they don't have the gasket they'll have the gasket maker/silicone.

Just did a quick search on AdvanceAuto and found Permatex Gasket Maker. It was around $3-4. It will work. If you plan to remove the OPDA often, get the gasket.
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Unread 04-25-2012, 05:06 PM   #3064
CoveBikr
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All went together very easy. Gasket sealer worked like a charm. Still having some chirping but that must be from the fan belt. The gears were not very worn... Will get pics. Cam looked great. Any easy trick to pulling the shaft out of assembly for inspection and pics. Gotta get it in my vice later. All together and started and ran like it was never touched. I feel much better with the new modded unit.

Can't post pics via the Android forum app. I'll get em later at computer.

Last edited by CoveBikr; 04-25-2012 at 05:22 PM..
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Unread 04-25-2012, 05:26 PM   #3065
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Quote:
Originally Posted by CoveBikr View Post
All went together very easy. Gasket sealer worked like a charm. Still having some chirping but that must be from the fan belt. The gears were not very worn... Will get pics. Cam looked great. Any easy trick to pulling the shaft out of assembly for inspection and pics. Gotta get it in my vice later. All together and started and ran like it was never touched. I feel much better with the new modded unit.

Can't post pics via the Android forum app. I'll get em later at computer.
You'll need a 3/16 punch and a hammer. There are no tricks. Line the punch up and whack it until it comes out. You will need to hit it moderately hard.
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Unread 04-25-2012, 06:54 PM   #3066
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Does anyone have a source and/or part number for just the OPDA drive gear? I've looked at Rock Auto and Quadratec so far, no listing.

Also looked at NAPA online, no luck
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Unread 04-25-2012, 07:09 PM   #3067
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Does anyone have a source and/or part number for just the OPDA drive gear? I've looked at Rock Auto and Quadratec so far, no listing.

Also looked at NAPA online, no luck
I'm pretty sure this is it. Rubi4MyMrs can confirm. He's done the swap. Or you can call Crown.

http://www.4wd.com/Distributor-Drive...pn=CRO83504635
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Unread 04-25-2012, 07:14 PM   #3068
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Crown makes one that I used & works well.

Crown doesn't sell direct to the public, though. I found it at 4 Wheel Parts for about $23 http://www.4wd.com/Distributor-Drive...pn=CRO83504635

83504635 Distributor Gear (2.5L, 4.0L)

Here is my write up as some steps need to be taken. Lope just reported on this thread a day or two ago on his experience with the gear as well.

http://www.jeepforum.com/forum/f9/20...l#post12053245
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Unread 04-25-2012, 07:30 PM   #3069
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I got my gear here http://www.jeep4x4center.com/distrib...-83504635.html
as another option for you.
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Unread 04-25-2012, 07:31 PM   #3070
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Thanks, Rubi.
I just found a gear at Morris 4 x 4 for these models/years: 1987-2002 Jeep 2.5L (150) I4 Engine Jeep 4.0L (242) I6 Engine
looks like the same part number and about the same price.
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Unread 04-25-2012, 07:32 PM   #3071
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Quote:
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I got my gear here http://www.jeep4x4center.com/distrib...-83504635.html
as another option for you.
Funny, lope.
Looks like I just cross posted...and I wasn't even dressed for that!!
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Unread 04-25-2012, 08:02 PM   #3072
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Quote:
Originally Posted by stripperguy View Post
Thanks, Rubi.
I just found a gear at Morris 4 x 4 for these models/years: 1987-2002 Jeep 2.5L (150) I4 Engine Jeep 4.0L (242) I6 Engine
looks like the same part number and about the same price.
Despite the years quoted, it works for our '05 & '06s. Good to support Morris since they are the ones that have the FSMs & parts manuals shown in Lope's sig. I used 4WD because there is one local to me & nice to save the shipping.
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Unread 04-25-2012, 09:17 PM   #3073
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Funny, lope.
Looks like I just cross posted...and I wasn't even dressed for that!!
With your handle, I wonder if you're dressed at all
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Unread 04-26-2012, 05:12 AM   #3074
stripperguy
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With your handle, I wonder if you're dressed at all
Ha....That stripperguy username always gets lots of attention.
It's actually a carryover from other forums, specifically, I build canoes. Cedar strip canoes, also known simply as "strippers", and I have been seen so many times with these boats that people say "Hey, there's that stripper guy again".

Oh, and I did some side jobs in my college years that I shouldn't talk about here!

But besides all that, I have received a damaged OPDA courtesy of whatnow.
I have disassembled it and measured some key dimensions. It seems there is an easy way to permanently fix the upper bushing issue that still uses the OEM components or at least most of them. Once I get all the design drawings complete, I'll post the results here...
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Unread 04-26-2012, 05:21 AM   #3075
CoveBikr
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OPDA pulled and really doesn't look nearly as bad as I thought it would. Cam gear looks very good. Things are a bit quieter with the modded OPDA, but i am still getting something that sounds a bit like laughing monkey. maybe it is something in the serpentine belt, tried tracking it down but no luck yet. more time will be spent this weekend. here are a couple pics. ill get shaft pics soon.

HIGH RES PICS HERE





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