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05-24-2016, 11:17 AM
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#1
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Name: diesel_importer
Title: Too Much Time
Status: Not Here
Join Date: Oct 2007
Location: Fairfield,TX
Member`s Gallery
Posts: 4,500
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Cylinder condition, thoughts?
Truck came in blowing coolant from puke bottle. Already deleted, but still had EGR cooler. I verified the cooler wasn't the culprit (yet to see a Cummins EGR cooler be the culprit of cooling system pressuring up).
This truck would bubble all the coolant out at idle, engine cold. After getting the head off, I was surprised to see the cylinder walls in this shape. 135k miles, can't feel the marks with your finger nail, but cross hatch is gone in those areas.
What are your thoughts?
Sent from my iPhone using Tapatalk
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01 QCSB 2WD AUTO: Redline/Smarty, Monster VP, 6x.013, S467 FMW, Goerend Trans, Caltracs.
Fuel only - 11.85 @ 114, 50 Shot - 11.58 @ 116 w/ 1.69 60'
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05-24-2016, 11:24 AM
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#2
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Name: BRE
Title: Too Much Time
Status: Not Here
Join Date: May 2010
Location: Southwest MO
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Posts: 12,705
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Blow bye?
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Rick
07 Dodge 3500 - Tow mirrors, silencer ring MIA, Spectra air filter.
Quote:
Originally Posted by jfaulkner
There really is nothing better than OEM. That goes for anything from turbos to boobs.
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RIP Dex KCCO
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05-24-2016, 11:49 AM
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#3
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Name: proctors garage
Title: Diesel Enthusiast
Status: Not Here
Join Date: Oct 2011
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Posts: 159
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been hot
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05-24-2016, 12:10 PM
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#4
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Name: JWhite
Title: Trained monkey
Status: Not Here
Join Date: Aug 2009
Location: F Burg Ohio
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Posts: 1,817
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What's the gasket look like?
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GMC with a LiLLY
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05-24-2016, 07:21 PM
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#5
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Name: dangerous06
Title: diesel tech
Status: Not Here
Join Date: Mar 2008
Location: Escondido CA
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Posts: 3,564
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I've seen several say thanks EPA The EGR is the culprit here! It puts blow by and exhaust back in the cylinders which crystalizes and scores the cylinders! Way to go most 6.7's won't see 200k! This one got hot for sure is that metal at the top off the pistons?
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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!
Last edited by dangerous06; 05-24-2016 at 07:23 PM.
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05-25-2016, 12:30 AM
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#6
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Name: Marq92
Title: Too Much Time
Status: Not Here
Join Date: May 2012
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Posts: 952
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That just looks like oil discoloration on the pistons.
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2001.0 QCLB 3500 4x4 3.55 Toyo M-55 255/85R16 Brown's/Goerend 48RE sonnax shafts/maxed count Alto clutches Carli/Deaver 3.0 EMF BJ's PSC 6 bolt box Synergy steering TheRetroShop HID projector retrofit VLED's DC Power 180A alternator W-T ground mod ISSPRO EV2's
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05-25-2016, 06:03 AM
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#7
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Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
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Posts: 10,820
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I assume that's the same cylinder shot from two directions?
Looks like the early onset of four corner scoring. I would agree with others, it's been hot enough for the Rings to butt.
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05.5 Campanella White TDi Jetta 5spd 45.5MPG
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05-25-2016, 08:31 AM
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#8
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Name: BluegrassDiesel
Title: UK2K!
Status: Not Here
Join Date: Apr 2007
Location: KENTUCKY
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Posts: 4,136
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If that came through the shop here, I'd recommend a rebuild without question
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Josh Land
Bluegrass Diesel Performance
Lancaster, Ky
SHOP ONLINE @ http://WWW.SHOPBLUEGRASS.COM
97 DodgePPL Limited Pro Stock "The Crippler"
09 3500 GMC CCDually
05 Silverado SS
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05-25-2016, 08:32 AM
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#9
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Name: Mark Nixon
Title: No Savior among the flesh
Status: Not Here
Join Date: Feb 2009
Location: Brownville, Nebraska
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Posts: 8,676
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That engine most definitely had blowby.
I've pulled a bunch of these apart and if it's marking the cylinders, it's usually into the piston skirts as well.
I'd say the engine was hot temp wise, not just an EGR fault.
At any rate, you're looking at more than a "hone and go" job there.
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.
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05-25-2016, 08:48 AM
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#10
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Name: diesel_importer
Title: Too Much Time
Status: Not Here
Join Date: Oct 2007
Location: Fairfield,TX
Member`s Gallery
Posts: 4,500
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Thanks, guys. I knew they got the truck hot at some point. I didn't think it had a lot of blowby, but I could be mistaken.
__________________
01 QCSB 2WD AUTO: Redline/Smarty, Monster VP, 6x.013, S467 FMW, Goerend Trans, Caltracs.
Fuel only - 11.85 @ 114, 50 Shot - 11.58 @ 116 w/ 1.69 60'
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05-25-2016, 09:24 AM
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#11
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Name: SledPuller21
Title: Never enough
Status: Not Here
Join Date: Jan 2007
Location: Pa
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Posts: 2,214
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Most likely doesn't have a lot of blow by from the looks of it, we've seen them here in worse shape with hardly any blowby, but noticeable top end knock. I would be willing to bet the skirts are scuffed as well and its well on its way to bigger problems. I would recommend a rebuild while the block can still be salvaged at .020".
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2007.5 6.7 QCSB 6in Superlift Murdered on BMF 20's
1995 ECLB-"Strung Out"
2003 QCLB "Strung Out II"
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Apex Diesel Performance & Machine
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07-19-2016, 02:34 PM
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#12
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Name: EverydayDiesel
Title: I drink diesel
Status: Not Here
Join Date: Feb 2016
Location: $FCE2
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Posts: 196
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Quote:
Originally Posted by Mark Nixon
That engine most definitely had blowby.
I've pulled a bunch of these apart and if it's marking the cylinders, it's usually into the piston skirts as well.
I'd say the engine was hot temp wise, not just an EGR fault.
At any rate, you're looking at more than a "hone and go" job there.
Mark.
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What is wrong with honing? I am just curious/learning...
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07-19-2016, 02:44 PM
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#13
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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
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Sometimes honing a damaged cylinder just isn't enough.
If you hone to clean up deep scratches, then you can end up with too loose of piston-wall clearance, causing piston "slap" and cause damage that way.
Then there is still the potential for scratches or defects to cause blowby.
Some builders precision hone cylinders to make more clearance in high performance applications, this is so that under heavy loads and higher RPMS, when the pistons "grow" with the more intense heat, it helps keep the pistons from scoring the bores.
A downside is that it, again, increases piston "slap" when cold and/or idling.
Honing to fix notable cylinder defects isn't the same as honing for clearance.
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.
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07-24-2016, 08:38 PM
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#14
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Name: HeTheAethyr!
Title: Too Much Time
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Join Date: Oct 2010
Location: Livermore Ca
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Posts: 317
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The pistons have to be removed to reviled the complete story.
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