Rod bearing wear - Competition Diesel.Com

diesel_ram_man · 10-15-2014, 10:09 AM

Is this normal wear for a low mileage 12v?

20141015_102829.jpg Photo by DieselPhreak \| Photobucket

20141015_102822.jpg Photo by DieselPhreak \| Photobucket

*Big Blue24* · 10-15-2014, 10:15 AM

Your rod bearings look better than the rod bearings from my 95' Junker Drag truck that had 245k miles with the last 5,000 of pure high hp abuse:

Mark Nixon · 10-15-2014, 10:20 AM

Nothing to get too terribly excited about.
At worst, it was probably short on oil changes.

Mark.

DISTURBED · 10-15-2014, 10:21 AM

Quote:

Originally Posted by diesel_ram_man

Is this normal wear for a low mileage 12v?20141015_102829.jpg Photo by DieselPhreak | Photobucket
20141015_102822.jpg Photo by DieselPhreak | Photobucket

Those look fine. The spot you see is where the cylinder is compressing and firing. Is anything done to the truck or is it bone stock?

diesel_ram_man · 10-15-2014, 10:29 AM

I was told l It came out of a ups truck and only had 5,000 miles. Was bone stock, cummins reman. I posted a thread a few weeks ago because when I pulled the head one piston was clean and the rest were sooty. Nobody really helped me sobi pulled the rod and seen this wasnt sure if it was normal to be off set like that.

DISTURBED · 10-15-2014, 10:42 AM

Quote:

Originally Posted by diesel_ram_man

I was told l It came out of a ups truck and only had 5,000 miles. Was bone stock, cummins reman. I posted a thread a few weeks ago because when I pulled the head one piston was clean and the rest were sooty. Nobody really helped me sobi pulled the rod and seen this wasnt sure if it was normal to be off set like that.

I wouldn't be concerned about it at all. Every cummins i've ever had a part has had the exact same wear marks except when you start opening up tolerances, running coated bearings and thicker oil. I would assume the marks on the bearing in the rods come from beating the oil out from between the journal and the bearing when on the compression stroke

AsTroSS · 10-15-2014, 10:43 AM

Recent bearing change, but at the first start it run too long without oil pressure.

DISTURBED · 10-15-2014, 10:46 AM

Quote:

Originally Posted by AsTroSS

Recent bearing change, but at the first start it run too long without oil pressure.

Ive seen this also when a good assembly lube wasn't used or not enough was used

S Phinney · 10-15-2014, 11:41 AM

Those appear to be standard bearings. Using H series Clevite bearings will make a huge difference in wear.

97rada · 10-15-2014, 12:49 PM

Those are good bearings. You would be amazed what comes out of an engine after 5 min of run time.

Sent from my iPhone using Tapatalk

diesel_ram_man · 10-15-2014, 02:39 PM

Cool deal thanks guys glad I wont have get this crank checked. Im probably gonna pull the rest of the rods, mostly because the one I pulled is Mexico cast. Which from what I read they are not the ones I want you guys agree? Gonna pull the rest and see what they are.

Im not really sure why the mexico rods are worse. Is it something that if I were to have them shot peened balanced and polished would that make them comparable to a another country rod?

sjholt · 10-21-2014, 06:23 PM

What me thinks those bearings are worn more than 5k miles and had been lugged a lot and oil dilution due to infrequent oil changes.
Who's me? Just an old mechanik who was an ASE master mechanic for 30+ years.
Skip H.

10-15-2014, 10:15 AM	#2
Big Blue24 Name: Big Blue24 Title: Comp Diesel Sponsor Status: Not Here Join Date: Jan 2008 Location: Cedar City, UT Member`s Gallery Posts: 6,310	Your rod bearings look better than the rod bearings from my 95' Junker Drag truck that had 245k miles with the last 5,000 of pure high hp abuse: __________________ 95' 2wd Junker Drag Truck 1502 HP Fuel-Only 12mm P7100 Pump SXE 472 over GTX55 116mm OEM 12v Block

10-15-2014, 10:20 AM	#3
Mark Nixon Name: Mark Nixon Title: No Savior among the flesh Status: Not Here Join Date: Feb 2009 Location: Brownville, Nebraska Member`s Gallery Posts: 8,676	Nothing to get too terribly excited about. At worst, it was probably short on oil changes. Mark. __________________ If you or I did business like the PEOPLE in government do business, we'd be put in jail. Government is coercive. Anarchy: The state of existence where there are no masters & no slaves. Therefore, Anarchy means the ABSENCE OF SLAVERY, or, in other words, FREEDOM.

10-15-2014, 10:29 AM	#5
diesel_ram_man Name: diesel_ram_man Title: Too Much Time Status: Not Here Join Date: Oct 2006 Location: Southport, NC Member`s Gallery Posts: 266	I was told l It came out of a ups truck and only had 5,000 miles. Was bone stock, cummins reman. I posted a thread a few weeks ago because when I pulled the head one piston was clean and the rest were sooty. Nobody really helped me sobi pulled the rod and seen this wasnt sure if it was normal to be off set like that. __________________ -Charley 2008 6.7 G56, EFI by Anarchy S465 2006 5.9 CCSB Race truck

10-15-2014, 10:43 AM	#7
AsTroSS Name: AsTroSS Title: problems start @80 psi Status: Not Here Join Date: May 2006 Location: Europe Member`s Gallery Posts: 4,327	Recent bearing change, but at the first start it run too long without oil pressure. __________________ Ram 2500 '98 QC 12V Cummins 4x4 automatic --->project: T-25 Ram 1500 ‘ 97 QC 12V Cummins conversion 4x4 automatic - ->project: T-15 Superb '21 -TDI 2.0 CR-205hp

10-15-2014, 12:49 PM	#10
97rada Name: 97rada Title: Too Much Time Status: Not Here Join Date: Feb 2008 Member`s Gallery Posts: 5,410	Those are good bearings. You would be amazed what comes out of an engine after 5 min of run time. Sent from my iPhone using Tapatalk __________________ Austin tow truck- 14-3500 with tuning toy truck -94 rclb auto- 5.2x with a lot left. Shooting for 4s Any intelligent fool can make things bigger and more complex...it takes a touch of genius- and alot of courage to move in the opposite direction.

10-15-2014, 11:41 AM	#9
S Phinney Name: S Phinney Title: Green Behind the Ears Status: Not Here Join Date: Oct 2008 Member`s Gallery Posts: 69	Those appear to be standard bearings. Using H series Clevite bearings will make a huge difference in wear.

10-15-2014, 02:39 PM	#11
diesel_ram_man Name: diesel_ram_man Title: Too Much Time Status: Not Here Join Date: Oct 2006 Location: Southport, NC Member`s Gallery Posts: 266	Cool deal thanks guys glad I wont have get this crank checked. Im probably gonna pull the rest of the rods, mostly because the one I pulled is Mexico cast. Which from what I read they are not the ones I want you guys agree? Gonna pull the rest and see what they are. Im not really sure why the mexico rods are worse. Is it something that if I were to have them shot peened balanced and polished would that make them comparable to a another country rod? __________________ -Charley 2008 6.7 G56, EFI by Anarchy S465 2006 5.9 CCSB Race truck

10-21-2014, 06:23 PM	#12
sjholt Name: sjholt Title: Rookie Status: Not Here Join Date: Jul 2008 Member`s Gallery Posts: 7	What me thinks those bearings are worn more than 5k miles and had been lugged a lot and oil dilution due to infrequent oil changes. Who's me? Just an old mechanik who was an ASE master mechanic for 30+ years. Skip H.