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#4721734 - 04/09/18 02:31 PM B-series Cummins cylinders at 448k miles
A_Harman Offline


Registered: 10/01/10
Posts: 6950
Loc: 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.
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1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
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#4721791 - 04/09/18 03:06 PM Re: B-series Cummins cylinders at 448k miles [Re: A_Harman]
SubieRubyRoo Offline


Registered: 05/14/12
Posts: 1236
Loc: Winchester, Indiana
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!

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#4721809 - 04/09/18 03:14 PM Re: B-series Cummins cylinders at 448k miles [Re: A_Harman]
bullwinkle Online   confused


Registered: 10/09/04
Posts: 7744
Loc: 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?
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#4721811 - 04/09/18 03:15 PM Re: B-series Cummins cylinders at 448k miles [Re: A_Harman]
SOHCman Offline


Registered: 03/29/10
Posts: 1337
Loc: 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!
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I urge people not to wait 100K to change out the fluid in their transfer case units. -Kestas

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#4721821 - 04/09/18 03:21 PM Re: B-series Cummins cylinders at 448k miles [Re: A_Harman]
JLTD Offline


Registered: 12/15/17
Posts: 837
Loc: US
Thanks for the pics! OCI and oil used please?
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#4721833 - 04/09/18 03:32 PM Re: B-series Cummins cylinders at 448k miles [Re: A_Harman]
jhellwig Offline


Registered: 07/01/13
Posts: 1574
Loc: Ottumwa, Iowa
Had the head gasket let go? What is with the carbon in between cylinders?
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#4721842 - 04/09/18 03:42 PM Re: B-series Cummins cylinders at 448k miles [Re: A_Harman]
rollinpete Offline


Registered: 03/20/17
Posts: 501
Loc: West Ma.
Gotta love them hatch marks.
That's a lot of miles, Nice Pic's.
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#4721864 - 04/09/18 04:15 PM Re: B-series Cummins cylinders at 448k miles [Re: bullwinkle]
A_Harman Offline


Registered: 10/01/10
Posts: 6950
Loc: 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
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#4721872 - 04/09/18 04:25 PM Re: B-series Cummins cylinders at 448k miles [Re: SOHCman]
A_Harman Offline


Registered: 10/01/10
Posts: 6950
Loc: 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.


Edited by A_Harman (04/09/18 04:25 PM)
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1985 Z51 Corvette track car
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel
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#4721879 - 04/09/18 04:30 PM Re: B-series Cummins cylinders at 448k miles [Re: JLTD]
A_Harman Offline


Registered: 10/01/10
Posts: 6950
Loc: 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

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#4721884 - 04/09/18 04:35 PM Re: B-series Cummins cylinders at 448k miles [Re: jhellwig]
A_Harman Offline


Registered: 10/01/10
Posts: 6950
Loc: 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

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#4721905 - 04/09/18 04:51 PM Re: B-series Cummins cylinders at 448k miles [Re: A_Harman]
krismoriah72 Offline


Registered: 02/16/09
Posts: 1577
Loc: wv
I would have gotten a used or reman head and spent the extra on new main bearings and an oil pump.

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#4722098 - 04/09/18 08:12 PM Re: B-series Cummins cylinders at 448k miles [Re: A_Harman]
gman2304 Online   content


Registered: 08/11/11
Posts: 3095
Loc: 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.

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#4722176 - 04/09/18 09:19 PM Re: B-series Cummins cylinders at 448k miles [Re: A_Harman]
Linctex Offline


Registered: 12/31/16
Posts: 6186
Loc: 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.
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(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4722178 - 04/09/18 09:20 PM Re: B-series Cummins cylinders at 448k miles [Re: gman2304]
Linctex Offline


Registered: 12/31/16
Posts: 6186
Loc: 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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