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B-series Cummins cylinders at 448k miles #4721734
04/09/18 02:31 PM
04/09/18 02:31 PM
Joined: Oct 2010
Posts: 7,033
Michigan
A_Harman Online content OP
A_Harman  Online Content OP
Joined: Oct 2010
Posts: 7,033
Michigan
My Dodge is in the shop for a head gasket change, which turned into a cylinder head swap.
Since they are waiting for parts, I took the opportunity to take pictures of the cylinders.



Cylinder 1 closeup.


Cylinder 1 overall.






Overall pretty good, but cylinders 1 and 6 didn't have any crosshatch left that I could see.
Cylinders 2 to 5 still had a good amount of crosshatch.


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: B-series Cummins cylinders at 448k miles [Re: A_Harman] #4721791
04/09/18 03:06 PM
04/09/18 03:06 PM
Joined: May 2012
Posts: 1,592
The land of USA-made Subies!
SubieRubyRoo Online content
SubieRubyRoo  Online Content
Joined: May 2012
Posts: 1,592
The land of USA-made Subies!
Wonder what the difference is... you'd think that being end cylinders they would run a little cooler, and therefore maintain a little bit more piston clearance. Still, not bad for nearly half a million miles! Thanks for the pics!

Re: B-series Cummins cylinders at 448k miles [Re: A_Harman] #4721809
04/09/18 03:14 PM
04/09/18 03:14 PM
Joined: Oct 2004
Posts: 8,066
Cincinnati, OH, USA
bullwinkle Offline
bullwinkle  Offline
Joined: Oct 2004
Posts: 8,066
Cincinnati, OH, USA
Hope they clean all the junk out of those cylinders before they put the head on! Did they find you a decent price on a new head for it?


06 Ram 3500 CTD 4X4(FG Venturi), 93 GMC C3500 6.2, 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7, 03 Merc Grand Marquis 4.6 2V(XG2)
Re: B-series Cummins cylinders at 448k miles [Re: A_Harman] #4721811
04/09/18 03:15 PM
04/09/18 03:15 PM
Joined: Mar 2010
Posts: 1,406
USA
SOHCman Offline
SOHCman  Offline
Joined: Mar 2010
Posts: 1,406
USA
lighting can play a big role in seeing crosshatch in a photo, but even to the naked eye you couldn't see any on 1 and 6?

Could always drop the pan and pull those cylinders for a stone or stiff arbor hone, but I suppose thats up to the customer.

thanks for the pics!


I urge people not to wait 100K to change out the fluid in their transfer case units. -Kestas
Re: B-series Cummins cylinders at 448k miles [Re: A_Harman] #4721821
04/09/18 03:21 PM
04/09/18 03:21 PM
Joined: Dec 2017
Posts: 1,159
US
JLTD Offline
JLTD  Offline
Joined: Dec 2017
Posts: 1,159
US
Thanks for the pics! OCI and oil used please?


I'm a thickie; assimilate
But 20s have their place

Using AMSOIL

Hers: 2008 Jeep Liberty 138k, SS 5w30/Amsoil

His: 2015 4Runner 41k, OE 5w20/Wix

Re: B-series Cummins cylinders at 448k miles [Re: A_Harman] #4721833
04/09/18 03:32 PM
04/09/18 03:32 PM
Joined: Jul 2013
Posts: 1,753
Ottumwa, Iowa
jhellwig Offline
jhellwig  Offline
Joined: Jul 2013
Posts: 1,753
Ottumwa, Iowa
Had the head gasket let go? What is with the carbon in between cylinders?


Sparks fly from my fingers.

1995 Chevy K2500 Suburban lt 5.7
2014 Toyota Sienna
1983 Chevy K5 350
Re: B-series Cummins cylinders at 448k miles [Re: A_Harman] #4721842
04/09/18 03:42 PM
04/09/18 03:42 PM
Joined: Mar 2017
Posts: 596
West Ma.
rollinpete Offline
rollinpete  Offline
Joined: Mar 2017
Posts: 596
West Ma.
Gotta love them hatch marks.
That's a lot of miles, Nice Pic's.


Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive185k miles
Last Change;
50/50 QSUD, QSHM. 5w30
Fram xg8a, Fram CA8141

Currently under the influence of oil shocked2

Re: B-series Cummins cylinders at 448k miles [Re: bullwinkle] #4721864
04/09/18 04:15 PM
04/09/18 04:15 PM
Joined: Oct 2010
Posts: 7,033
Michigan
A_Harman Online content OP
A_Harman  Online Content OP
Joined: Oct 2010
Posts: 7,033
Michigan
Originally Posted By: bullwinkle
Hope they clean all the junk out of those cylinders before they put the head on! Did they find you a decent price on a new head for it?


Oh yes, they just had pulled the head, so there was debris, oil, and coolant on the piston tops.
The new cylinder head is EXPENSIVE, but comes with a lifetime warranty that will be honored anywhere in the US.
Oh, my aching credit card!


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: B-series Cummins cylinders at 448k miles [Re: SOHCman] #4721872
04/09/18 04:25 PM
04/09/18 04:25 PM
Joined: Oct 2010
Posts: 7,033
Michigan
A_Harman Online content OP
A_Harman  Online Content OP
Joined: Oct 2010
Posts: 7,033
Michigan
Originally Posted By: SOHCman
lighting can play a big role in seeing crosshatch in a photo, but even to the naked eye you couldn't see any on 1 and 6?

Could always drop the pan and pull those cylinders for a stone or stiff arbor hone, but I suppose thats up to the customer.

thanks for the pics!


I borrowed a shop light so I could get up close to the cylinders, and couldn't really see any crosshatch on 1 and 6.
I asked the shop owner about doing a flex-hone job on it, and he said the pan would have to be dropped to get the piston-rod assemblies out.
I just don't want to spend the money now. The oil consumption has been hanging around 3k miles per quart, and the fuel economy and towing power has not changed as far as I can tell, so I think it will go a bit longer.

Last edited by A_Harman; 04/09/18 04:25 PM.

1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: B-series Cummins cylinders at 448k miles [Re: JLTD] #4721879
04/09/18 04:30 PM
04/09/18 04:30 PM
Joined: Oct 2010
Posts: 7,033
Michigan
A_Harman Online content OP
A_Harman  Online Content OP
Joined: Oct 2010
Posts: 7,033
Michigan
Originally Posted By: JLTD
Thanks for the pics! OCI and oil used please?


Mostly RT6 for OCI's between 21k and 37k miles.
From '03 to '09, VPBC 15w40 annually, which in those years was ~18k miles.
I've been doing UOA's since 2011, which are all posted in the diesel UOA page here.


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: B-series Cummins cylinders at 448k miles [Re: jhellwig] #4721884
04/09/18 04:35 PM
04/09/18 04:35 PM
Joined: Oct 2010
Posts: 7,033
Michigan
A_Harman Online content OP
A_Harman  Online Content OP
Joined: Oct 2010
Posts: 7,033
Michigan
Originally Posted By: jhellwig
Had the head gasket let go? What is with the carbon in between cylinders?


The head gasket was leaking coolant externally at the rear corner of the block. It was going through about 1/2-gallon of coolant per day, and was really making a mess underneath the truck. But no coolant was showing up in the UOA's, and it was not pushing coolant out of the radiator. I am comfortable that the fire ring seal was still good on all cylinders.


1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
1972 GMC 1500 shortbed project truck
Re: B-series Cummins cylinders at 448k miles [Re: A_Harman] #4721905
04/09/18 04:51 PM
04/09/18 04:51 PM
Joined: Feb 2009
Posts: 1,583
wv
krismoriah72 Offline
krismoriah72  Offline
Joined: Feb 2009
Posts: 1,583
wv
I would have gotten a used or reman head and spent the extra on new main bearings and an oil pump.

Re: B-series Cummins cylinders at 448k miles [Re: A_Harman] #4722098
04/09/18 08:12 PM
04/09/18 08:12 PM
Joined: Aug 2011
Posts: 3,210
n.c.
gman2304 Online content
gman2304  Online Content
Joined: Aug 2011
Posts: 3,210
n.c.
I would definitely install new main bearings and a new oil pump. At almost 1/2 million miles, and the low RPM torque of that engine, its cheap insurance.

Re: B-series Cummins cylinders at 448k miles [Re: A_Harman] #4722176
04/09/18 09:19 PM
04/09/18 09:19 PM
Joined: Dec 2016
Posts: 6,471
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,471
Waco, TX
Use a ridge reamer (PROPERLY!) and it will clean that ring of carbon off the top of the cylinder without taking any metal off.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: B-series Cummins cylinders at 448k miles [Re: gman2304] #4722178
04/09/18 09:20 PM
04/09/18 09:20 PM
Joined: Dec 2016
Posts: 6,471
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,471
Waco, TX
Originally Posted By: gman2304
I would definitely install new main bearings and a new oil pump. At almost 1/2 million miles, and the low RPM torque of that engine, its cheap insurance.


There is a LOT of merit to this....


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
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