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12-31-2019, 04:34 PM
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#1
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Junior Member
Join Date: Mar 2018
Posts: 3
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Water in oil
I have a 2008 Tiffin with a 360 turbo Cummins with 53000 miles. The liner in my #1 cylinder was leaking water into my oil. In reviewing all cylinder liners found that all 6 liners were eroded and was about to start leaking. Cummins tells me that the cause was that the coolant was not the proper mixture. Has anyone else had this type of problem? I don’t understand that with only 53K miles why this would be an acceptable answer. The cost to repair with almost a complete rebuild engine @ $11200.00. No help from Cummins. Any suggestions?
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12-31-2019, 04:58 PM
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#2
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,723
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Wet sleeved engine. The supplemental coolant additive (SCA) level needs to be regularly monitored!
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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12-31-2019, 05:34 PM
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#3
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Senior Member
Join Date: Jul 2014
Posts: 35,317
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Pitting in cylinder liners is a direct result of cavitation erosion. This type of erosion develops from normal mechanical and chemical processes that take place during engine operation.
Cavitation of the cylinder wall begins when air bubbles remove the wall’s oxide film, which protects the metal from coming into contact with oxygen and corroding. Flexing of the cylinder wall (after fuel combustion) causes the cylinder liner to vibrate, and creates vapor bubbles in the coolant. These vapor bubbles form on the outside of the cylinder wall and explode inward, or implode, resulting in tiny pits on the cylinder wall’s protective oxide layer. When vapor bubbles continue to implode, enough energy is released to physically attack the cylinder wall and remove the oxide film. Corrosion and pitting then take place at a high rate.
If a pit breaks through the cylinder wall, coolant can leak into the cylinder and contaminate the lube oil. A sludge forms that can interfere in ring and bearing functions. Wear rates increase significantly and engine seizure may result.
The best way to prevent cavitation from occurring is to follow your engine manufacturer’s recommendations on additive replacement. When using a standard heavy-duty coolant, SCA (Supplemental Coolant Additive) should be added every 250 hours to help replenish the eroding oxide film.*
https://www.cat.com/en_US/by-industr...er-liners.html
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12-31-2019, 05:50 PM
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#4
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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You're lucky if only $11,200. My two rebuilds (NOT related to cavitation) cost me $53,000 in 5 years. The ISX 650's have valves that break off, cure is new head, valves, liners and pistons.
Here's a perforated liner.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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01-02-2020, 05:06 AM
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#5
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Senior Member
Join Date: Apr 2016
Posts: 548
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Lots of discussion on this personally I did not want to worry about this so I went to final charge coolant and pretty much have done this with every diesel i have.
__________________
Blaine and Amy (2013 Winnebago Journey 42e)( previous 2002 Winnebago Journey 39dl)
Blog www.rvparttime.com
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01-16-2021, 05:06 PM
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#6
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Junior Member
Join Date: Feb 2017
Posts: 6
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Quote:
Originally Posted by boyland
Lots of discussion on this personally I did not want to worry about this so I went to final charge coolant and pretty much have done this with every diesel i have.
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Boyland, can you explain "I went to the final charge coolant". Not sure what this means.
I just lost my cummins 8.3L engine due to cavitation .
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01-16-2021, 05:44 PM
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#7
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Senior Member
Join Date: Jul 2014
Posts: 35,317
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01-16-2021, 05:58 PM
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#8
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Registered User
Newmar Owners Club Ford Super Duty Owner Freightliner Owners Club Retired Fire Service RVer's
Join Date: Jan 2019
Location: Rosemary Farm, Northern Ca
Posts: 5,444
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Quote:
Originally Posted by twinboat
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TB your thoughts? I’m at 30k and thinking it’s time for a complete flush and new stuff, so....? My chart says 48 mo, no mileage standard.mOts a,2016. So, according to the calendar it’s time. And maybe time is the point. Time for corrosion. Another miles. But 30k miles seems early. A $400 coolant flush and service sounds like cheap insurance and I’m all for having this done while I’m in Nappanee in March, but now I’m thinking I might want to either do it myself or at least supply the coolant, i.e. Final Charge.
So.....whaddayah think?
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01-16-2021, 06:19 PM
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#9
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Senior Member
Join Date: Dec 2019
Posts: 653
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Yes, Coolant neglect is a common problem with many RV'ers. They seem to just think millage and Not time :(
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01-16-2021, 07:34 PM
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#10
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Senior Member
Join Date: Jul 2014
Posts: 35,317
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Its not the coolant that goes bad, its the additives, that prevent cavitation that need to be replaced.
I would follow the engine manafacters recommendation. Attachment 314731
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01-16-2021, 07:51 PM
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#11
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,723
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Quote:
Originally Posted by Mr Ted
Yes, Coolant neglect is a common problem with many RV'ers. They seem to just think millage and Not time :(
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Not really their fault. A LOT of owners have no idea their wet sleeved diesel engine has different coolant requirements than their daily driver !
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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01-16-2021, 08:06 PM
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#12
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Senior Member
Join Date: May 2013
Location: S. California
Posts: 1,379
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Quote:
Originally Posted by twinboat
Pitting in cylinder liners is a direct result of cavitation erosion. This type of erosion develops from normal mechanical and chemical processes that take place during engine operation.
Cavitation of the cylinder wall begins when air bubbles remove the wall’s oxide film, which protects the metal from coming into contact with oxygen and corroding. Flexing of the cylinder wall (after fuel combustion) causes the cylinder liner to vibrate, and creates vapor bubbles in the coolant. These vapor bubbles form on the outside of the cylinder wall and explode inward, or implode, resulting in tiny pits on the cylinder wall’s protective oxide layer. When vapor bubbles continue to implode, enough energy is released to physically attack the cylinder wall and remove the oxide film. Corrosion and pitting then take place at a high rate.
If a pit breaks through the cylinder wall, coolant can leak into the cylinder and contaminate the lube oil. A sludge forms that can interfere in ring and bearing functions. Wear rates increase significantly and engine seizure may result.
The best way to prevent cavitation from occurring is to follow your engine manufacturer’s recommendations on additive replacement. When using a standard heavy-duty coolant, SCA (Supplemental Coolant Additive) should be added every 250 hours to help replenish the eroding oxide film.*
https://www.cat.com/en_US/by-industr...er-liners.html
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Are you saying that someone in a cold climate using standard heavy duty coolant that SCA is much more important than someone in a non freezing state barely using a 50-50 mixture? Also, are you saying the additives in standard heavy duty coolant is the root of the problem, or the lack of using additives in standard heavy duty coolant is the problem?
__________________
2003 Monaco Knight 36ft PST Triple Slide- 315 ISC
2007 Jeep Grand Cherokee 3.0 Diesel 4x4
2- 2013 Yamaha VXR's 70MPH+. 2019 Sun Tracker 18ft Pontoon w/ 75hp Mercury
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01-17-2021, 02:48 AM
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#13
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Senior Member
Join Date: Apr 2016
Posts: 548
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Quote:
Originally Posted by twinboat
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Yes if you read the link faq it really simplifies the maintenance elimination of maintenance
Like I said same thing we use in every diesel
I honestly cannot think of any reason not too if you are doing a flush and fill
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01-17-2021, 04:56 AM
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#14
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Senior Member
Join Date: Jun 2011
Location: Mims, Fla
Posts: 254
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Verify compatibility of sensors before switching coolant type. FL told me that switching coolants was a no go on our previous 2014 cummins engine. Resorted to testing coolant for SCA levels which showed significantly reduced levels at 30,000 miles. Replaced coolant rather than adding SCA supplements.
__________________
David
2019 Newmar DSDP 4369
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