a litte confused - 2 0r 3 codes? 725 or 752? maybe a typo? no p0700?
p0733 trans code 3rd gr .....with that p0752 seams more likely?
how is the trans fluid? hoping not the mess you just dealt with...
I would suggest you use some RISOLINE* and change the oil a little more often trying to flush it out...long drives with hot oil temps will help move it.
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well, cleaned out the crap and it runs perfect - except for the trouble codes p0733 and p0725. 752 is a speed sensor code, but which one, the one on the rear axle or the trans? Oh, and INDY, the pics are a comin. I'll pm you my paypal.
one on the tranny is more for speed where the rear usually is ABS (although i have heard of where the rear make the speed go dead.)
I don't want to dis your mechanic friends, but I must discredit you about your claim Castrol oil possilby sludging an engine. I have been a castrol user for almost 25 years. Ran this stuff on my turbo's for the first 15 years with over 150k miles on it. Never had issues. Now I have been using their syntec version for the entire 70k miles that I have driven on my Durango.
Sluding on a motor only happens from two conditions;
1. Poor mainentance (common here)
2. Mechnical part failure causing sludge. (Not as common as 1.)
As long as I have been a member in this forum, the only symptom that a user has found that may have caused sludging on a 4.7 specifically is a bad gasket/plenum from the main intake manifold that slowly leaks coolant into the oil. Over time, the coolant and oil mix with high temperature will sludge the engine. I remember a user even posted a Chrysler TSB concerning possible intake manifold gasket/plenum failure that can lead to oil sludging on a 4.7 specific engine.
I would recommend looking to check the plenum/gasket once you addressed the sludge in your engine.
ya, that is true, but from what i have expierenced with engine sludge, (around here anyways) is that the person brigning the problem vehicle in was that they stated that they always used castrol (or so they claimed.)
i have heard of that tsb for dodge/chrysler, but ive also seen this same problem on other makes, and models. we all have our own opinions, and me personally ill go with the one that offers a guarantee. sure i may have to pay more for the oil, but ill know that my engine lubrication system is covered under a guarantee.
If you take care of the truck like your suppose to it wont gum up with sludge. It's all because of the owner here people and not because of the engine or Durango. Maybe the lube place who does his changes are installing the wrong lubricant or the owner isn't doing scheduled oil changes. I believe that the 4.7L in particular should have the oil changed in 3000 mile increments even with Fully Synthetic (good name I like Mobil 1 10W-30 High Mileage) but each to their own. With all that I have gathered I have a hypothesis that the oil jackets are thinner in the 4.7L then the 5.2L and 5.9L engines thus the reason for the extra oil changes.
Now I'll most likely get some beef from the guys here on that but again this is my opinion.
i have followed the 5k miles change interval suggested in my owners manual for almost 90k miles with 0 evidence of sludging but you have to follow the maintance schedule that most closely matches your driving habits, check your owners manual and it explains the differences,
I have the same issue as the OP. I had some huge chunks of sludge underneath my valve cover. Bad thing is that I broke some of them off when changing the lifters. Now the D lost oil pressure. So looks like I'll be cutting the oil pan off so I dont have to worry about pulling it out, then just weld it back.
you dont have to cut it off, just unbolt the ypipe, loosen the motor mounts, and the raise the engine 4" or so. you cant get the pan out, but you have plenty of room to clean it and remove the pickup tube and the gasket.
well, cleaned out the crap and it runs perfect - except for the trouble codes p0733 and p0725. 752 is a speed sensor code, but which one, the one on the rear axle or the trans? Oh, and INDY, the pics are a comin. I'll pm you my paypal.
Well do we have a transfer of funds and pictures or what?
