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09-19-2016, 04:20 PM
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#1
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Senior Member
Join Date: Feb 2012
Location: Southern California
Posts: 1,550
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Cummins ISX "600"
There has been extensive writings about owner's love/hate relationship and associated expenses with the ISX 650.
I also remember vaguely that it had something to do with the "dual Overhead..." something? I am a total non-tech.
My reason for this thread is that I am about to pull-the-trigger (with a very shaky hand) on the purchase of a 2007 Monaco with an ISX 600. NOT a 650.
Any thoughts and or warnings???
Thanks
__________________
2006 Monaco Signature 45' Commander IV ISX 600 & 12.5 KW Genset
2013 Avalanche toad
And a rather large and very hairy Bear for a traveling companion
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09-19-2016, 10:31 PM
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#2
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Senior Member
Join Date: Nov 2009
Location: Warren, Oregon
Posts: 2,560
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__________________
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
SilverLeaf 330 Magnum 2812 PSW 2011 Ford Edge Sport-Air Force One
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09-19-2016, 10:49 PM
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#3
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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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He PM'D me so I answered him in a return PM.
The 600 seems to have fewer problems than the 650 in the 2007 EPA models. The 2010 EPA MODEL single OHC don't seem to have the problems that the double OHC 2007 models did.
__________________
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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09-20-2016, 01:21 PM
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#4
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Senior Member
Holiday Rambler Owners Club
Join Date: Apr 2016
Posts: 596
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Keep in mind those years all had the ceramic plungers that are notorious to failure in the injection pumps. If it has been updated I would feel better, if its all stock untouched I'd be concerned.
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2002 Holiday Rambler Imperial 40PKD
with Residential refrigerator conversion
2014 Jeep Wrangler in tow, M&G brake system
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09-20-2016, 01:25 PM
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#5
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Senior Member
Holiday Rambler Owners Club
Join Date: Apr 2016
Posts: 596
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Dropped Valve ISX650 Cummins - Engines - FMCA Motorhome Forums
Keep in mind the HP is just HP, not a different design engine, still the same components that failed on one can fail on another. The link above cost this poor guy a small fortune.
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2002 Holiday Rambler Imperial 40PKD
with Residential refrigerator conversion
2014 Jeep Wrangler in tow, M&G brake system
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09-20-2016, 01:30 PM
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#6
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Senior Member
Entegra Owners Club
Join Date: Sep 2012
Posts: 6,695
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My milage experience has been a little better, about 6.4 mpg over 27000 miles. It also uses DEF, to the tune of about 1 gallon per 27 gallons of fuel, or about 4.2% of the gallons of diesel used on my latest 1500 mile drive.
__________________
Dave and Beth
2015 Cornerstone 45J
2020 Ford F-150 Lariat
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09-20-2016, 01:54 PM
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#7
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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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Quote:
Originally Posted by jleamo1
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Not true, the 650 has different ECM programming, turbo, torque converter and maybe cams than the 600 since the injectors are controlled by one of the cams on the DOHC ISX. Plus Cummins has come out with new parts and programming for the '07 engine to, hopefully, prevent it from happening again. Doesn't help those that already have that engine till it's rebuilt like mine was last year for the second time in 45,000 miles.
My mileage is running 7.6 over 45,000 miles.
__________________
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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