2005-06 Jeep OPDA_CPS_Distributor Failure - Page 227 - JeepForum.com
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Unread 06-22-2012, 09:02 AM   #3391
BioTex
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Digger,
Everything in your above post is spot on IMO. However, I don't agree with the change drive gears part though because there just isn't a good prospect out there. The aftermarket ones are not a simple swap on job, and there is too great a chance that there could be some misalignment that will wipe out the cam.
Gear cut, hardness, quality control, too many things can go wrong.

The only gear I would swap in would be from a brand new OPDA, but at $125 each, not a viable option for everybody. Me personally, I plan to just swap out my OPDA every 40 - 50K or so. I'll pull it frequently and check the wear, and go from there.

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Unread 06-22-2012, 09:19 AM   #3392
JustinCHorst
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Quote:
Originally Posted by BioTex View Post
Digger,
Everything in your above post is spot on IMO. However, I don't agree with the change drive gears part though because there just isn't a good prospect out there. The aftermarket ones are not a simple swap on job, and there is too great a chance that there could be some misalignment that will wipe out the cam.
Gear cut, hardness, quality control, too many things can go wrong.

The only gear I would swap in would be from a brand new OPDA, but at $125 each, not a viable option for everybody. Me personally, I plan to just swap out my OPDA every 40 - 50K or so. I'll pull it frequently and check the wear, and go from there.
With a properly modded and cared for OPDA I think you/we will find that replacing them at that frequency will not be needed..just a hunch, but Ill be keeping an eye on mine.
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Unread 06-22-2012, 11:55 AM   #3393
willydigger
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Quote:
Originally Posted by JustinCHorst View Post
With a properly modded and cared for OPDA I think you/we will find that replacing them at that frequency will not be needed..just a hunch, but Ill be keeping an eye on mine.
I agree. I don't think the FogMod fixes the gear wear. When people contact me with those expectations I try to talk them down. The binding is the much bigger deal. A gear that wears away (granted at a faster rate than previous models) IMO is expected.

I do believe changes in oil type and regular intervals will help the gear wear. At some point I would expect to pull my OPDA and see more gear wear. The teeth are relatively thick and the gear is designed to be a wear part. We don't have anything conclusive to fix the gear wear. As the gear wears, there will be codes and warning. With binding you are playing Russian Roulette (maybe not that extreme but you get the point).

I'm excited to see what stripperguy has come up with. I think the brainstorming process between members has been the key to getting through this. Part support group, part engineering division. At this point, I'm extremely comfortable with my oil cup. I watch the thread more to keep the first page updated than I do looking for a solution.
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Unread 06-22-2012, 12:31 PM   #3394
Bigbob
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Ah, here we go on oil again! LOL

My thoughts:

If you use a proper ACEA A3 oil you will have enough zinc. IMHO if you add 2 quarts of straight zinc it won't stop thew wear of the gear. I don't think the gear wear is due to oil specs, but the system may not get enough oil to the gear, but that may not be true either. The oil issue on these engines relates to the lifters and cam lobes mainly.

I think the gear wear is directly connected to the bushing bind. Spinning at 1200 rpm any binding of the bushing causes the load at the gear to increase dramatically. Even though you might spin the shaft easy by hand, that does not mean it don't bind.

I also think the actual engine block casting may be flawed on some engines to the point the gear backlash is wrong or at the wrong angle.

If what stripperguy is coming up with similar to what I envision in my engineering mind (with no tools in hand!) this will be the fix. I looked at doing the same sort of thing but my idea/design used bronze bushings. I contacted a bushing builder in Michigan but the cost was going to be prohibitive. We know the top bushing does not get proper lubrication and we also know the bushing material is all wrong. He addresses both those.

stripperguy may be a hero soon.
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Unread 06-22-2012, 12:38 PM   #3395
Bigbob
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BTW, the load on the gear should be minimal. Look what it drives? Basically only the oil pump. Spinning that sensor wheel is a very small load. It's the bushing design boys. The basic "distributor" design, driving the oil pump and the ignition system or sensor wheel, has been around for 80 years. Not many failures before due to oil or whatever.

This is a bushing design failure.
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Unread 06-22-2012, 12:39 PM   #3396
Gary2
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check out stripperguys company site sometime , He can show ya how to make bearings last with no oil . I beleive he is part magician

My back up has landed . Sleep better tonight
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Unread 06-27-2012, 08:15 PM   #3397
ChaseB
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I've made the switch to VR1 in my Jeep because of an oil leak I had with the Mobil 1 synthetic. For those of you running the VR1, how long are you going between oil changes?
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Unread 06-27-2012, 08:30 PM   #3398
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I'm around 4,000
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Unread 06-27-2012, 08:32 PM   #3399
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Quote:
Originally Posted by ChaseB View Post
I've made the switch to VR1 in my Jeep because of an oil leak I had with the Mobil 1 synthetic. For those of you running the VR1, how long are you going between oil changes?

I' around 4,000 every oil change with VR1, no oil leaks and 55,000 miles with the oil bath mod.
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Unread 06-28-2012, 06:11 AM   #3400
mhopton
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Those using the VR1, are you using the Dino version, or synthetic?
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Unread 06-28-2012, 09:19 AM   #3401
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Quote:
Originally Posted by mhopton
Those using the VR1, are you using the Dino version, or synthetic?
Dino
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Unread 06-28-2012, 09:30 AM   #3402
locosdj
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Quote:
Originally Posted by mhopton View Post
Those using the VR1, are you using the Dino version, or synthetic?
Dino
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Unread 06-28-2012, 12:14 PM   #3403
ChaseB
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Dino as well, stopped my rear main leak

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Unread 06-28-2012, 09:06 PM   #3404
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Dino here too on the VR1...10W30
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Unread 07-01-2012, 06:57 AM   #3405
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Dino VR-1 10W30 here to, change it every 3k mi.
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