Strange Failure - Competition Diesel.Com

dangerous06 · 12-12-2017, 04:48 PM

Got a truck in with a loud knock. I noticed all the adjustment screws were turned all the way in on the rockers. "BEYOND NORMAL"
Pulled the motor did a quick tear down and noticed the cam had eaten about a 1/4" into the block on the rear. I pulled the cam and all the bearings were scored like it was run with out oil. I know Cummins don't use bearings not sure what that part is called! However all the main and rod bearings look fine as do all the cylinders. Has anyone seen this before? really weird!

dangerous06 · 12-12-2017, 04:49 PM

Can the block be saved? I'm thinking junk! Unless it can be bored is this possible?

pushlar84 · 12-12-2017, 05:16 PM

Yes a good machine shop can line bore it for cam bushings
I’ve seen quite a few trucks do this and we fix them

jasonc · 12-12-2017, 05:18 PM

The rocker adjusters were turned all the way in to try to make it run when it was eating the cam.

Signature600 · 12-12-2017, 05:23 PM

Quote:

Originally Posted by pushlar84

Yes a good machine shop can line bore it for cam bushings
I’ve seen quite a few trucks do this and we fix them

It would depend on how far it's eaten the block...

Chris

pushlar84 · 12-12-2017, 05:32 PM

Quote:

Originally Posted by Signature600

It would depend on how far it's eaten the block...

Chris

We did find a oversized bushing for the real bad ones

dangerous06 · 12-12-2017, 11:54 PM

Quote:

Originally Posted by pushlar84

We did find a oversized bushing for the real bad ones

Do you have a part number for that I'm gonna need it!
As far as the nicest way to ask what a **** job mechanic I am well Word of mouth is all I use I don't do this for a living. I just help my fellow Cummins people out! Seems I get 2 to 3 engine R/R a month as far away as Washington so far. They have come to me so I must be doing something right......OH Yeah I don't charge but for parts and a little labor! I'm not afraid to ask questions either! I'd rather have a few opinions and learn the right way than just throw parts at a problem! I come to this site for the few that know what they are talking about and want to help. As far as the assholes hey this IS COMPD!!
I'll be ok!

Poulina · 12-13-2017, 10:38 AM

Should be able to line bore the journals and press in some oversized bushings. Lmk if you need a stock cam

SixOhh · 12-13-2017, 03:42 PM

dangerous06 · 12-13-2017, 09:52 PM

Quote:

Originally Posted by Poulina

Should be able to line bore the journals and press in some oversized bushings. Lmk if you need a stock cam

Thanks I got a stack of them! Got really good at swapping the gear over!
I'll try and get a pic up but since photo bucket got greedy I'm not sure what platform to use I sure in hell am not paying them a monthly fee! I wish I could pull photo's from my computer! Anyone know how to do that?! And post them here!

Red Sleeper · 12-13-2017, 10:14 PM

TapaTalk is quick, easy and free on your smart phone for pictures.

I upload pictures via phone then edit the post on a PC to add detailed descriptions.

Rich dzl · 12-14-2017, 03:17 PM

What valve springs/cam combo was you running .. I saw this several times guys running cheap valve springs that run near coil bind . Pressures are high 550-600 lbs way to much for reg low zinc oil ..

dangerous06 · 12-15-2017, 11:52 PM

UPDATE: Upon tear down noticed the girdle bolts were installed wrong. the torques head was not under the oil pickup tube in the right spot a regular bolt was there and when they
tightened the pick up tube down it fractured the cast end piece. This lead to sucking air which in turn lead to oil starvation to the cam. and the cam ate the block! So a wasted block and engine due to some builder not knowing what they were doing! and to make things worse they used regular bolts to install the oil squirters! Now that was funny! Poor customer had to eat it 7500. installed and no core for me!

JWhite · 12-16-2017, 12:08 PM

Can't say I've seen that before.

How did they expect the oil to get through?

12vCumminsFTW · 12-16-2017, 05:17 PM

Guy I know did that. couldn't figure out why it wouldn't make oil pressure

Broaner · 12-24-2017, 12:45 AM

that such a basic idea. The special bolt is very clearly for that spot. WOW. Some people should just put the wrenches down and go back to desk jobs.

12-12-2017, 04:48 PM	#1
dangerous06 Name: dangerous06 Title: diesel tech Status: Not Here Join Date: Mar 2008 Location: Escondido CA Member`s Gallery Posts: 3,564	Strange Failure Got a truck in with a loud knock. I noticed all the adjustment screws were turned all the way in on the rockers. "BEYOND NORMAL" Pulled the motor did a quick tear down and noticed the cam had eaten about a 1/4" into the block on the rear. I pulled the cam and all the bearings were scored like it was run with out oil. I know Cummins don't use bearings not sure what that part is called! However all the main and rod bearings look fine as do all the cylinders. Has anyone seen this before? really weird! __________________ E.D. 66-74-091, T-4 exhaust, 2 Micron filter pre CP3, EFI, S&B intake, ARP 625 head studs, 182-214 Hamilton Cam,springs and push rods,40% injectors, Banks Intercooler, T&C CP-3 & PRV, Built 48RE, 5" exhaust,Carrillo rods, Pacbrake!

12-12-2017, 04:49 PM	#2
dangerous06 Name: dangerous06 Title: diesel tech Status: Not Here Join Date: Mar 2008 Location: Escondido CA Member`s Gallery Posts: 3,564	Can the block be saved? I'm thinking junk! Unless it can be bored is this possible? __________________ E.D. 66-74-091, T-4 exhaust, 2 Micron filter pre CP3, EFI, S&B intake, ARP 625 head studs, 182-214 Hamilton Cam,springs and push rods,40% injectors, Banks Intercooler, T&C CP-3 & PRV, Built 48RE, 5" exhaust,Carrillo rods, Pacbrake!

12-12-2017, 05:16 PM	#3
pushlar84 Name: pushlar84 Title: pushlar84 Status: Not Here Join Date: Dec 2009 Location: new york Member`s Gallery Posts: 658	Yes a good machine shop can line bore it for cam bushings I’ve seen quite a few trucks do this and we fix them __________________ 2001 Ram- fuel by Northeast Diesel, 2.6 ED, Allison 1000. Haisley cam, engine & trans built in house

12-13-2017, 10:38 AM	#8
Poulina Name: Poulina Title: Too Much Time Status: Not Here Join Date: Dec 2015 Location: Norcal Member`s Gallery Posts: 795	Should be able to line bore the journals and press in some oversized bushings. Lmk if you need a stock cam __________________ 2008 QCLB 6.8 48re Suncoast PCS, DDP supermentals, forcedinductions 467/87, Hamilton 188/220, Carrillos, studded mains w/stock girdle

12-13-2017, 03:42 PM	#9
SixOhh Name: SixOhh Title: EPA unfriendly Status: Not Here Join Date: Aug 2008 Location: Magnolia, TX Member`s Gallery Posts: 1,108	__________________ 07' Silver 2500 5.9 4x4 LWB Goerend 48re-csp5/EFI- T&C Mild Cp3-F1 Apex 7.5 -S369sxe Amsoil Coolant Bypass -Airdog-D&J- Hamilton 188/220 -AFE-ARP Opti-Lube H-Town Off-Road

12-12-2017, 05:18 PM	#4
jasonc Name: jasonc Title: Too Much Time Status: Not Here Join Date: Nov 2009 Member`s Gallery Posts: 4,412	The rocker adjusters were turned all the way in to try to make it run when it was eating the cam.

12-13-2017, 10:14 PM	#11
Red Sleeper Name: Red Sleeper Title: Too Much Time Status: Not Here Join Date: Aug 2009 Location: Lone Star State Member`s Gallery Posts: 4,597	TapaTalk is quick, easy and free on your smart phone for pictures. I upload pictures via phone then edit the post on a PC to add detailed descriptions. __________________ Nick J '14 Silverado LTZ 5.3 4wd '05 Cummins QCSB 4wd 48re '91 Cummins w350 5spd

12-14-2017, 03:17 PM	#12
Rich dzl Name: Rich dzl Title: 12v guru Status: Not Here Join Date: Mar 2011 Member`s Gallery Posts: 741	What valve springs/cam combo was you running .. I saw this several times guys running cheap valve springs that run near coil bind . Pressures are high 550-600 lbs way to much for reg low zinc oil .. Last edited by Rich dzl; 12-14-2017 at 03:20 PM.

12-15-2017, 11:52 PM	#13
dangerous06 Name: dangerous06 Title: diesel tech Status: Not Here Join Date: Mar 2008 Location: Escondido CA Member`s Gallery Posts: 3,564	UPDATE: Upon tear down noticed the girdle bolts were installed wrong. the torques head was not under the oil pickup tube in the right spot a regular bolt was there and when they tightened the pick up tube down it fractured the cast end piece. This lead to sucking air which in turn lead to oil starvation to the cam. and the cam ate the block! So a wasted block and engine due to some builder not knowing what they were doing! and to make things worse they used regular bolts to install the oil squirters! Now that was funny! Poor customer had to eat it 7500. installed and no core for me! __________________ E.D. 66-74-091, T-4 exhaust, 2 Micron filter pre CP3, EFI, S&B intake, ARP 625 head studs, 182-214 Hamilton Cam,springs and push rods,40% injectors, Banks Intercooler, T&C CP-3 & PRV, Built 48RE, 5" exhaust,Carrillo rods, Pacbrake!

12-16-2017, 12:08 PM	#14
JWhite Name: JWhite Title: Trained monkey Status: Not Here Join Date: Aug 2009 Location: F Burg Ohio Member`s Gallery Posts: 1,817	Can't say I've seen that before. How did they expect the oil to get through? __________________ GMC with a LiLLY Last edited by JWhite; 12-16-2017 at 12:09 PM.

12-16-2017, 05:17 PM	#15
12vCumminsFTW Name: 12vCumminsFTW Title: Too Much Time Status: Not Here Join Date: Dec 2010 Location: Willcox, AZ Member`s Gallery Posts: 1,377	Guy I know did that. couldn't figure out why it wouldn't make oil pressure __________________ -Aaron H. 97 12v 4x4

12-24-2017, 12:45 AM	#16
Broaner Name: Broaner Title: Been There n Broke That Status: Not Here Join Date: Apr 2012 Location: Madison, WI Member`s Gallery Posts: 744	that such a basic idea. The special bolt is very clearly for that spot. WOW. Some people should just put the wrenches down and go back to desk jobs. __________________ 05.5 QCSB Shotpeened NV5600 - 994hp/1650tq, 6.7, Wagler Rods, QSB Pistons, 625's, Oversized Valves, ZZFab, P&P, 150%, Dual CP3, 69/73/1.0 & 82/96/1.32 Street Triple, 35's, Trutrac, Carli, MM3 from Gordon, 1100hp