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Unread 04-22-2011, 04:59 PM   #1066
TJJP77
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Quote:
Originally Posted by Rubi4MyMrs View Post
I also wonder about mating a new gear to a worn cam gear. If the wear isnít great (deep) is it better to keep the mated surfaces together rather than changing one. Of course both new is ideal but certainly a lot costlier.
What will happen is what happened to mine: the wear on the camshaft gear will transfer itself to the new OPDA gear very quickly - in short order, a new OPDA gear will look exactly like your old one.

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Unread 04-22-2011, 05:01 PM   #1067
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Quote:
Originally Posted by willydigger View Post
Rubi, what type of oil do you plan to try?
Iím leaning towards the Valvoline VR1 10-40 in the engine. I definitely want to try to improve this situation (gear wear, not top bushing wear).

As far as in the cup, I will probably use the VR1 also. The clearances are tight & its gravity fed so I donít want a thick oil, especially for winter, but I still need max protection. One of the guys at M-Dale was very sharp. After I explained what & why I was doing what I was doing, he really got into helping me. Believe it or not, he asked me what viscosity I planned to use, pointing out how small the passage was on the adapter. We actually considered a cup with 1/16 pipe threads, but I considered the hole too small. What do you think? Would a synthetic be better because of the lower viscosity?




Quote:
Originally Posted by Peterpsc View Post
That oil cup is clever. Thank you for the effort. I did the fogmod but darn if I don't like the oil-cup idea. Has it leaked?
Donít know about leaks. Havenít installed it yet. I still have to do a little work on the shaft (clean & polish the lower scratches) then decide whether to replace the gear before final assembly. Then I can at least fill it. Iím in CA now & the Jeep is in NV so it will be a couple weeks before I can actually test it.
p64210139.jpg  
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Unread 04-22-2011, 05:13 PM   #1068
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Quote:
Originally Posted by TJJP77 View Post
What will happen is what happened to mine: the wear on the camshaft gear will transfer itself to the new OPDA gear very quickly - in short order, a new OPDA gear will look exactly like your old one.
That's what I thought. At this point I may as well keep the old one for now & watch it. When it gets thin replace it & decide then on a cam replacement. I hope that with a better oil it will slow the wear somewhat.
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Unread 04-22-2011, 05:27 PM   #1069
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Ultimately, the fix for me is:
1. New Roller Cam....something like this http://www.shop.505performance.com/p...&categoryId=31
2. FogMod
3. ZDDP Plus in the oil with a synthetic oil (I live in a hot climate)

I am going to look at the Hesco bronze gear as well.
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Unread 04-22-2011, 05:29 PM   #1070
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Willy-

Here's a shot of the Factory 04 and 06 gears side by side. The 04 is on the right. The holes on both of them are the same.

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Unread 04-22-2011, 06:28 PM   #1071
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Baseplate, I would totally forget about the Hesco bronze gear. It will get eaten away too quickly. I just met with a vendor last week who was talked into buying a bronze gear. He spoke of how his wife was stranded because of the gear failure. The bronze gear is more for specialized applications, not a DD.

tkki, the CPS I got was from RockAuto for $38. It was Dorman from China. I had heard conflicting reports about the hole size so I went ahead and got one. I assume the one you have was pulled from a Jeep? I suppose those needing a gear can try pulling a CPS from an earlier model. Maybe the factory gear is the same as the 2005-06 and the aftermarket ones need the holes opened.
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Unread 04-22-2011, 06:30 PM   #1072
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Originally Posted by Rubi4MyMrs View Post
That's what I thought. At this point I may as well keep the old one for now & watch it. When it gets thin replace it & decide then on a cam replacement. I hope that with a better oil it will slow the wear somewhat.
That is my plan too. I think eventually a new camshaft will be required. At that point I will for sure use a high ZDDP oil for break in and beyond.
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Unread 04-22-2011, 06:41 PM   #1073
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Originally Posted by Baseplate View Post
Ultimately, the fix for me is:
1. New Roller Cam....something like this http://www.shop.505performance.com/p...&categoryId=31
Sweet! Too bad they're so proud of it. I'd be happy with a stock grind roller cam.
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Unread 04-22-2011, 06:53 PM   #1074
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Quote:
Originally Posted by willydigger View Post
tkki, the CPS I got was from RockAuto for $38. It was Dorman from China. I had heard conflicting reports about the hole size so I went ahead and got one. I assume the one you have was pulled from a Jeep? I suppose those needing a gear can try pulling a CPS from an earlier model. Maybe the factory gear is the same as the 2005-06 and the aftermarket ones need the holes opened.
Yup, it was off of a factory unit.
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Unread 04-23-2011, 08:04 AM   #1075
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tkki, the CPS I got was from RockAuto for $38.

I searched on their site both for OPDA and CPS no matches
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Unread 04-23-2011, 09:16 AM   #1076
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Originally Posted by chutta View Post
tkki, the CPS I got was from RockAuto for $38.

I searched on their site both for OPDA and CPS no matches
Those are aftermarket parts from RockAuto. Tkki pulled his from an 04 jeep. For a perfect unmodified match you'll have to go to a junk yard or maybe the dealer.
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Unread 04-23-2011, 10:06 AM   #1077
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Quote:
Originally Posted by Baseplate
Ultimately, the fix for me is:
1. New Roller Cam....something like this http://www.shop.505performance.com/p...&categoryId=31
2. FogMod
3. ZDDP Plus in the oil with a synthetic oil (I live in a hot climate)

I am going to look at the Hesco bronze gear as well.
My experiment will be to replace my opda and keep running Mobil 1 with 4oz of zddp plus to see how the new gear holds up. I really think that the new oils have a lot to do with the gear wear and I'm very surprised that this issue doesn't get more attention in the Jeep community. After all, it had lots to do with Jeep moving to the v6 in 2007.

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Unread 04-23-2011, 10:13 AM   #1078
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Originally Posted by JeepScrap View Post
After all, it had lots to do with Jeep moving to the v6 in 2007
Huh???...
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Unread 04-23-2011, 10:49 AM   #1079
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Quote:
Originally Posted by Knuckelhead

Huh???...
The EPA mandated that all auto manufacturers use roller cams to tolerate lower zddp levels in oil which is why Chrysler moved to the V6 in 2007. The flat tappet cam in the Jeep 4.0 or any flat tappet motor REQUIRES zddp.

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Unread 04-23-2011, 12:12 PM   #1080
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Anyone replace a cam yet? If so what did you go with?
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