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Unread 05-22-2012, 09:32 PM   #3241
Rubi4MyMrs
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You almost have to remove the belt. Here is a photo of mine with the belt off & some white paint to highlight the notch in the pulley.

p4110132.jpg  
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Unread 05-22-2012, 09:46 PM   #3242
lope
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Quote:
Originally Posted by RaggedOleMan View Post
I went to install the new OPDA, and I went to start the Jeep, and it wouldn't. I suspect I didn't get the OPDA lined up correctly...so I went back and read how to get it lined up, but I'm having a problem...I can not find the Timing marks on my 4.0...I have a copy of the 2005 Service manual, and posted the page specific to this below.

As I face the engine from the front, I look down just to the right of the middle. Where are the timing marks? I've cleaned off the area where I "think" they should be, but am not finding them. So I must be looking in the wrong area?
My '05 doesn't have timing marks like that either. It's just a single "dial" that you line up with the mark on the crank pulley. The mark on the pulley isn't easy to see. I've had to use a small mirror and flashlight from underneath to see it or, you can remove the serpentine belt to see it from the top.

EDIT: Ruby4MyMrs beat me to the draw
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Unread 05-22-2012, 10:00 PM   #3243
RaggedOleMan
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Quote:
Originally Posted by Rubi4MyMrs View Post
You almost have to remove the belt. Here is a photo of mine with the belt off & some white paint to highlight the notch in the pulley.
Thanks!

Yes! I see that, but it's clearly not consistent with the FSM! And I saw that area, and cleaned it up on my Jeep, and I found the mark on the vibration damper. So I'm not going crazy! Thanks...

Also, the DRB tool is a problem, I haven't got one to "CAM/CRANK RELEARN". Is there any way around that, or do I need to get a house call from the mechanic I use?

Thank you, too, LOPE...
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Unread 05-22-2012, 10:17 PM   #3244
Rubi4MyMrs
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Don't worry about the DRB. Set the marks on TDC, line up the alignment pin holes in the OPDA & start it up. Even if you are off a bit & get the P0016 code you can tweek it into place without the DRB.
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Unread 05-22-2012, 11:09 PM   #3245
RaggedOleMan
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Got my mojo working! And no more whack -a-mole either...halle-frickin' lullya!

1. I pulled the coil rail,
2. Pulled the number one cylinder/plug,
3. Rotated the crank until the piston was at the top.
4. Checked the TDC below,
5. Tweaked/rotated the crank ever so slightly,
6. Pulled the OPDA out,
7. Repositioned it consistent with the way it was when I pulled it the first time,
8. Slightly rotated the wheel in the OPDA about 5 minutes counterclock wise,
9. Dropped it in. It lined up perfectly.
10 Buttoned everything back up,
11.It fired first time!

Damn I'm good! Thanks guys! I'm expecting a code to pop up. We'll see.

EDIT 5/23/12: A Big Mac attack last night found me trying to start my Jeep. It started, but within 30 seconds or less it began to sputter out. I shut it down. Guess I didn't get it in the correct orientation/location....will update when I've solved it. To others who are planning on doing this, I can't emphasize enough how important it is to thoroughly understand & follow the removal/re-installaton procedure!
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Unread 05-22-2012, 11:54 PM   #3246
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I had the same problem and since I was pulling the OPDA so much, I made a pointer on the opposite side where I could see it when I was installing the OPDA. I bolted an "L" bracket to the timing chain cover on the alternator side on the engine, and marked the balancer with a dremel cut off wheel. Now I can align the marks with the OPDA.
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Unread 05-23-2012, 06:12 AM   #3247
JustinCHorst
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If you turn the jeep over (with a wrench)while you are under the Jeep you can put your finger on the notch mark to feel when it lines up...so easy and you dont have to remove your belt.
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Unread 05-23-2012, 08:27 AM   #3248
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The timing marks are a lot easier to see if you pull the belt off the engine.
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Unread 05-23-2012, 08:57 AM   #3249
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I pulled my OPDA to check it last night and was kinda confused as to what to inspect. I did notice that after I put it back in that the sound changed, but then went back to the normal squeak in a few minutes. The shaft spun with no resistance though. Here are a couple pics of the gear. I turned it to show the wear.
opda-001.jpg   opda-004.jpg  
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Unread 05-23-2012, 07:59 PM   #3250
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This morning my Jeep had generated two codes: P2308 #3 Coil, and P2302 #1 coil. So I pulled & checked the coil rail, then reseated it. That worked. Then a buddy came by with something similar to a DRB, sophisticated scan tool & helped to reset the timing. That did require loosening of the bolt that holds down the OPDA, and rotating/clocking it, quite similar to rotating the distributor on older rigs. When he was done, he said to take the Jeep on the road, take it to over 45mph, and then let it coast down to 25-ish. Said to do that 3, 4 or 5 times and that will recalibrate the computer. When it was all done it ran perfect...add another $80.

I see why LRod went to the trouble of rigging up something to make the problem of lining it back up, easier. I feel your pain, LRod! I have to admit I thoroughly underestimated my ability to re-install & realign the OPDA with precision. I want that statement to serve as fair warning to other noobradoodle OPDA guys like myself out here in JeepVille....
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Unread 05-24-2012, 04:38 AM   #3251
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Just curious, to the members having problems re-installing the OPDA, which method are you using before you remove it, sharpie, alignment pin?? I was under the impression using the alignment pin on the OPDA wheel/housing when you remove and re-install it things should be real close to dead on. Just collecting information before I pull mine this weekend, Thanks!
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Unread 05-24-2012, 05:00 AM   #3252
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Quote:
Originally Posted by jeep06
Just curious, to the members having problems re-installing the OPDA, which method are you using before you remove it, sharpie, alignment pin?? I was under the impression using the alignment pin on the OPDA wheel/housing when you remove and re-install it things should be real close to dead on. Just collecting information before I pull mine this weekend, Thanks!
I had difficulty my first time using the sharpie for some reason, but using the pin subsequently I've never had a hiccup.
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Unread 05-24-2012, 06:47 AM   #3253
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The squeal my jeep is making is coming from the driver's side rear of the engine. It kinda sounds like the OPDA but in the wrong location.
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Unread 05-24-2012, 08:25 AM   #3254
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Quote:
Originally Posted by flying_bosun View Post
I had difficulty my first time using the sharpie for some reason, but using the pin subsequently I've never had a hiccup.
I also use the pin (allen key) method. Last time I pulled mine the timing was set to +1 degree before and was at +2.8 after. Since +/- 10 is within spec I'd say it was in pretty darn close to the exact position after.
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Unread 05-24-2012, 09:23 AM   #3255
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Doing a OPDA swap is about as difficult as changing sparks plugs, that is where I would rate the difficulty of doing this anyway. If you follow the instructions given (using a sharpie or pin or both) you will not have an issue.

All that being said, not everyone can change their own spark plugs. That is not a dig on anyone, it's just a fact. Mechanical skills, ability to follow instruction and basic understanding on how an engine works can vary widely.
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