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#3393239 - 06/09/14 05:47 PM 2001 Jeep GC 4.0 with Rotella T6 5679 miles
Donald Offline


Registered: 03/21/04
Posts: 13185
Loc: Upstate NY
The continuing saga of my reman 4.0 engine. The engine runs fine, decent mileage, no smoke.

Polaris flagged the lead as abnormal (orange) and the oxidation critical (red).

(first to last)

Html:
Test#	1	2	3	4	5
Mileage	9622	5184	5606	5334	5679					
Iron 	146	43	26	28	55   
Chrom 	4	1	1	1	1   
Nickel	1	0	0	0	0   
Alum 	4	1	1	1	2   
Copper  23	12	16	20	24
Lead    15	8	4	3	47 
Tin     2	1	1	1	2
Cadmi   0	0	0	0	0	
Silv    0	0	0	0	0 
Vanad   0	0	0	0	0
Silicon 25	12	13	8	12 
Sodiu   18	6	6	9	15 
Potas   6	1	5	0	0 
Titan   0	1	0	0	0 
Moly    61	58	67	62      61
Antim   1	0	0	1	0 
Mang    2	0	0	0	0 
Lith    0	0	0	0	0
Boron   280	163	30	21	23	
Magn  	14	14	892	1041	1049	
Calc  	3611	2651	1008	814	737
Bari   	0	0	0	0	0
Phos	772	723	868	942	921  
Zinc  	923	864	1103	1189	1143
Fuel	<1	<1	2.2	2.0	<1
Soot	<.1	<.1	<.1	<.1	<.1
Water	<.1	<.1	<.1	<.1	<.1
V@100C	11.1	10.2	12.9	13.3	13.5
TBN   	3.4	4.47	4.22	NES	4.13	
Oxi    	20	25	17	NES	30
Nit     16	12	13	NES	14  


Test#1 PU
Test#2 PU
Test#3 T6
Test#4 T6
Test#5 T6



Obviously the sharp jump in lead is a concern. Copper + lead = bearing failure.

Current change is PP (old formulation).




Edited by Donald (06/09/14 05:49 PM)
_________________________
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1
Amsoil ATF in both vehicles & Magnefine filter.

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#3393253 - 06/09/14 06:01 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Donald]
actionstan Offline


Registered: 05/22/13
Posts: 424
Loc: Ohio
If its a reman, does it have a warranty? If so I might bring it up with the shop that did it/company that supplied the engine, just to see what they say. Those seem like high/inconsistent numbers, I would personally be a little worried.
_________________________
1999 Saturn SL1
2013 KIA Forte

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#3393259 - 06/09/14 06:06 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Donald]
NHGUY Offline


Registered: 10/09/11
Posts: 3249
Loc: USA
Factory rebuilt? Marshall engine?

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#3393260 - 06/09/14 06:07 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Donald]
Donald Offline


Registered: 03/21/04
Posts: 13185
Loc: Upstate NY
The reman engine has almost 60K miles on it. Way past the warranty I was given.

Should I consider any action? Even if I knew which bearing was failing what would I do?
_________________________
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1
Amsoil ATF in both vehicles & Magnefine filter.

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#3393280 - 06/09/14 06:26 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Donald]
Kuato Offline


Registered: 10/23/05
Posts: 2855
Loc: Northeastern MT
Tough question, what to do....T6 should be giving great wear but there's obviously something going on within the engine. You could always try replacing the bearings and see what happens.

Shot in the dark? I'd consider calling the reman company, and find out the specifications on the rebuild to insure they used the right sized bearings; if they were too thick, making the clearances too tight, then you might expect heavy wear, at least until they were back to "normal" clearances.
_________________________
04 Jeep Wrangler 2.4 MT 183k
13 F150 4x4, 5.0, 22k

both on Amsoil

Common sense isn't common any more. Is it.

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#3393291 - 06/09/14 06:36 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Donald]
901Memphis Offline


Registered: 08/14/10
Posts: 4888
Loc: Northern Kentucky
Switch to a 10w30 conventional like PYB and see that lead drop.
_________________________
1999 Ford Taurus 145k (Vulcan v6) - Mobil 1 High Mileage 5w30 | FL400S
2002 Buick Century 102k - PU 5w30 / Fram Ultra XG 3980 / Filter mag

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#3393303 - 06/09/14 06:47 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Kuato]
actionstan Offline


Registered: 05/22/13
Posts: 424
Loc: Ohio
Originally Posted By: Kuato
Tough question, what to do....T6 should be giving great wear but there's obviously something going on within the engine. You could always try replacing the bearings and see what happens.

Shot in the dark? I'd consider calling the reman company, and find out the specifications on the rebuild to insure they used the right sized bearings; if they were too thick, making the clearances too tight, then you might expect heavy wear, at least until they were back to "normal" clearances.


If the bearings go back to "normal clearances" wouldn't they at that point be worn, along with the crank, and highly scuffed? I think that would then cause quicker wear, and eventually knocking because loss of oil pressure. The bearing and crank surfaces need to remain smooth.. if clearances were too tight.. I don't think this would be possible.
_________________________
1999 Saturn SL1
2013 KIA Forte

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#3393389 - 06/09/14 08:02 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Donald]
Chris142 Offline


Registered: 06/05/03
Posts: 11080
Loc: apple valley, ca
bump it up to 15w40.lets see what that does
_________________________
02 Jeep Wrangler super-s 10/30
87 F250 Diesel Delo 15w40
04 Tahoe STHM 10w30
Z400 napa 15w50
KLR250 Maxima 10w40
Polaris Trailblazer delo 5w40

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#3393398 - 06/09/14 08:08 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Donald]
Eddie Offline


Registered: 12/07/03
Posts: 6596
Loc: Florida, Cape Coral
Over reacting to one OCI. Check again after a 5-6K OCI.
_________________________
CX5 Touring 2.5L :-)

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#3393423 - 06/09/14 08:35 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: 901Memphis]
Donald Offline


Registered: 03/21/04
Posts: 13185
Loc: Upstate NY
Originally Posted By: 901Memphis
Switch to a 10w30 conventional like PYB and see that lead drop.


This is the 3rd oil change with T6 and this is the first oil change where the lead really shot up.
_________________________
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1
Amsoil ATF in both vehicles & Magnefine filter.

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#3393427 - 06/09/14 08:36 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Kuato]
Donald Offline


Registered: 03/21/04
Posts: 13185
Loc: Upstate NY
Originally Posted By: Kuato
Tough question, what to do....T6 should be giving great wear but there's obviously something going on within the engine. You could always try replacing the bearings and see what happens.

Shot in the dark? I'd consider calling the reman company, and find out the specifications on the rebuild to insure they used the right sized bearings; if they were too thick, making the clearances too tight, then you might expect heavy wear, at least until they were back to "normal" clearances.


This was a reman not a rebuild. They would have turned the crank and used the proper bearings for a machined crank.
_________________________
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1
Amsoil ATF in both vehicles & Magnefine filter.

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#3393430 - 06/09/14 08:39 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Donald]
Donald Offline


Registered: 03/21/04
Posts: 13185
Loc: Upstate NY
So if the bearings get loose don't they start squirting more oil on the cylinder walls than the oil rings can handle.

Maybe thats only the rod bearings and a main bearing has the problem.
_________________________
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1
Amsoil ATF in both vehicles & Magnefine filter.

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#3393476 - 06/09/14 09:18 PM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: NHGUY]
Donald Offline


Registered: 03/21/04
Posts: 13185
Loc: Upstate NY
Originally Posted By: NHGUY
Factory rebuilt? Marshall engine?


Yes a Marshall reman.
_________________________
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1
Amsoil ATF in both vehicles & Magnefine filter.

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#3393741 - 06/10/14 08:01 AM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Donald]
dlundblad Offline


Registered: 09/30/13
Posts: 1278
Loc: Indiana
Sorry to see you haven't gotten this issue straightened out Donald. Will the engine manufacturer do anything about this? 60,000 miles is such a shame.

I second the 15w40 trial run, but either way I don't think any oil will make much of a difference.
_________________________
I've been bitten by the BITOG bug.

2003 Jeep Grand Cherokee 4.0
QS Defy 10w 30 w/ Fram TG8A


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#3393754 - 06/10/14 08:13 AM Re: 2001 Jeep GC 4.0 with Rotella T6 5679 miles [Re: Donald]
Donald Offline


Registered: 03/21/04
Posts: 13185
Loc: Upstate NY
So can one assume its just one bearing? How easy would it be to find that bearing? If its a rod or main bearing could just the bearing be replaced or could the crankshaft have an issue which would require machining.
_________________________
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1
Amsoil ATF in both vehicles & Magnefine filter.

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