Go Back   PowerStrokeArmy > Power Strokes > 7.3 Tech

Reply
 
Thread Tools Display Modes
  #1  
Old 04-01-2020, 04:19 PM
KBMKVIII's Avatar
KBMKVIII KBMKVIII is offline
Major
Member's Gallery
 
Join Date: Apr 2012
Location: In a Wind Turbine
Posts: 1,319
Default Rod/Main bearing questions

Just pulled the bearings out for a rebuild and I have some crazy looking spalling/pitting on the factory rod and main bearings.
Always had quality oil with frequent ociís of about 4-5k miles.
What could cause this damage?
Crank looks fine and will be getting a polish.
Billet rods going back in.







__________________
Ď96 7.3. PIS 350 200s. Precision Turbo 76mm. Big Oil.
Ď18 Cummins 2500 White Laramie Sport.
Stock with a warranty
  #2  
Old 04-01-2020, 06:49 PM
Magnum PD's Avatar
Magnum PD Magnum PD is offline
General
Member's Gallery
 
Join Date: May 2011
Location: VA
Posts: 9,308
Default

How many miles? Stock bearings? Stock bottom end?
__________________
96 F-350 RC 4x4 Hypermax Rods, PIS 300/200s G head tunes, S471, Beans IDM, ARP head & main, girdle, half filled block, DI cam, Dual IPRs, ceramic coated bowls, anti-friction skirts, Haldex pump over Stock pump, Diesel site High volume lpop, Billet intake Plenums, Dual SD pumps, Fluidampner, beehive springs, cosmetic head gaskets, Inconel valves, hardend guides, Ported and polished heads by me, home made RR fuel, 5 speed tranny, with SB 3600 DxD. Snow water meth.
  #3  
Old 04-01-2020, 07:15 PM
KBMKVIII's Avatar
KBMKVIII KBMKVIII is offline
Major
Member's Gallery
 
Join Date: Apr 2012
Location: In a Wind Turbine
Posts: 1,319
Default Rod/Main bearing questions

261k mi and stock bottom.
Same bearings it rolled out of the factory with.
I had 350/200s for maybe 10k of those mild with extremely mild tunes from gearman.
__________________
Ď96 7.3. PIS 350 200s. Precision Turbo 76mm. Big Oil.
Ď18 Cummins 2500 White Laramie Sport.
Stock with a warranty
  #4  
Old 04-07-2020, 09:57 AM
mandkole's Avatar
mandkole mandkole is offline
Major
Member's Gallery
 
Join Date: Jan 2012
Location: Northwest
Posts: 2,302
Default

Hmm.. It certainly doesnít owe you anything but I think Iíd be micíing the journals and rod ends closely.

Assembly and component design have improved over the years. Iíve seen recent 1m mile big truck engines with amazing looking parts with typical care and OCIs.
__________________
2000 F250 CCSB GT4294R, 250/100s, Dahl/Fuelab, BTS, PHP tuning, stock 17* pump
1994 F250 SCLB
(sold)
1997 F250 CCSB 2wd (sold)
  #5  
Old 04-07-2020, 12:45 PM
KBMKVIII's Avatar
KBMKVIII KBMKVIII is offline
Major
Member's Gallery
 
Join Date: Apr 2012
Location: In a Wind Turbine
Posts: 1,319
Default

Well I am pretty sure I know what happened now.
Talking with my machinist he said it is definitely lack of lubrication.
The worst of the bearings were the mains of 3-4. This is exactly where I tapped the oil galley in the block for a second feed for my twin 17* pumps.
It will not be reinstalled the same way.
Going to draw from the oil filter housing instead.
Funny a few years back I was told by some others doing the same, it was the best place.
Well they are definitely wrong.
If you need a secondary feed for big oil make sure itís on the oil filter housing where the plug is, not the oil galley.
Lesson learned.
Crank miced near perfect and is getting a very light polish.
__________________
Ď96 7.3. PIS 350 200s. Precision Turbo 76mm. Big Oil.
Ď18 Cummins 2500 White Laramie Sport.
Stock with a warranty
  #6  
Old 04-07-2020, 06:40 PM
Magnum PD's Avatar
Magnum PD Magnum PD is offline
General
Member's Gallery
 
Join Date: May 2011
Location: VA
Posts: 9,308
Default

I see. Gonna have to some changing then.
__________________
96 F-350 RC 4x4 Hypermax Rods, PIS 300/200s G head tunes, S471, Beans IDM, ARP head & main, girdle, half filled block, DI cam, Dual IPRs, ceramic coated bowls, anti-friction skirts, Haldex pump over Stock pump, Diesel site High volume lpop, Billet intake Plenums, Dual SD pumps, Fluidampner, beehive springs, cosmetic head gaskets, Inconel valves, hardend guides, Ported and polished heads by me, home made RR fuel, 5 speed tranny, with SB 3600 DxD. Snow water meth.
  #7  
Old 04-08-2020, 05:38 PM
mandkole's Avatar
mandkole mandkole is offline
Major
Member's Gallery
 
Join Date: Jan 2012
Location: Northwest
Posts: 2,302
Default

Good deal 👍
__________________
2000 F250 CCSB GT4294R, 250/100s, Dahl/Fuelab, BTS, PHP tuning, stock 17* pump
1994 F250 SCLB
(sold)
1997 F250 CCSB 2wd (sold)
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 10:59 AM.

 

Powered by vBulletin®
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

Designed by Military Ltd