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09-16-2014, 05:11 AM
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#1
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Junior Member
Newmar Owners Club
Join Date: Jul 2011
Posts: 15
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Dutch Star 4004 ISC 350
Over heating on long Pull I 68 North to Kysers Ridge. Anyone else having this prob? Pulling 2010 Crv. Thanks..
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09-16-2014, 05:57 AM
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#2
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Senior Member
Newmar Owners Club
Join Date: Jul 2006
Location: Wellington, Florida
Posts: 13,599
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Hi fastman,
This all depends. Can you provide more information?
1. What is the outside temp?
2. What speed are you trying to maintain?
3. Are you down shifting manually to keep the RPMs around 2K-2.2K?
4. Define overheating. Does the engine overheat to the point of derating itself?
5. Do you have a "real" coolant temp indicator or are you using the dash gage?
__________________
Gary
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours
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09-16-2014, 08:08 AM
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#3
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Senior Member
Tiffin Owners Club
Join Date: Aug 2010
Location: Montgomery, AL
Posts: 1,199
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Could be several things. One, have you cleaned your radiator lately? Another is maintaining rpms when climbing. I try for 1700 rpms and downshift if the temp starts to rise.
__________________
Mel (Melanie) and Harry
2009 Tiffin Phaeton 40QTH
2014 Jeep Wrangler Sport
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09-16-2014, 08:24 AM
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#4
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Community Moderator
Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 31,558
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Check your coolant level, make sure the cooling fins on the radiator are clean and not dirty. Keep your RPMs between 2000 and 2200.
__________________
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.
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09-16-2014, 03:34 PM
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#5
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Senior Member
Tiffin Owners Club
Join Date: Feb 2014
Location: Whitehouse Station, NJ
Posts: 828
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I pulled this hill in early July in my Phaeton ISC 380 pulling a Ford Edge. No overheating problems. Did not manually downshift, transmission handled it adequately on its own. I tend to cruise around 63 mph and don't worry about speed going up mountains. I keep eye on temperature gauge and would manually downshift if needed as others have suggested. I wouldn't think you should have issues so check radiator fins and coolant levels as already mentioned.
__________________
Randy & Ella (terrier mix rescue)
2020 Winnebago View 24J
Downsized from 2013 Tiffin Phaeton 40QBH
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09-16-2014, 04:24 PM
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#6
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,713
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If its a rear radiator cooling system, odds are the radiator fins are dirty with oil-slick from the engine oil breather (aka "slobber tube"). Give it a good cleaning.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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09-17-2014, 06:13 AM
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#7
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Junior Member
Newmar Owners Club
Join Date: Jul 2011
Posts: 15
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Thanks All, Yes cleaned radiator, yes oil level good, yes coolant good even checked chemical balance. No did not shift manual. Let tranx do it's own shifting as recommended by Cummins. The degrease thing caught my eye. Road grudd could be coating fins. Yes, dash gage and to the point temp alarm goes off. Temp outside is always above 90 degrees when I make this trip and high humidity....checked engine at truck stop and does not appear hot or smell hot....cools back down to 190 in just a few minutes after stopping...keeps pulling strong even after alarm.....even got behind truck in slow lane and slowed down but didn't help....worse if anything.....thanks everyone...appreciate all the input and help......Ernie in Virginia Beach
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09-17-2014, 08:07 AM
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#8
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Senior Member
Join Date: Jul 2010
Location: Conway, SC
Posts: 2,557
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Cummins may say to let the tranny do it's own shifting, but on a long grade you should shift it down til the RPM's are 1800-2100. You'll definately see a big difference in temps.
__________________
2000 Dutch Star Pusher
2009 Saturn Vue Towed
Full timed for 6yrs.
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09-17-2014, 08:16 AM
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#9
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Senior Member
American Coach Owners Club
Join Date: Feb 2012
Location: Lakeland. Florida
Posts: 340
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Quote:
Originally Posted by Ramets
Cummins may say to let the tranny do it's own shifting, but on a long grade you should shift it down til the RPM's are 1800-2100. You'll definately see a big difference in temps.
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I will agree with this, if I wait for the automatic downshift, engine will start lugging on steep grades and the water temperature will climb rapidly. Try downshifting ahead of the momentum loss and see what the results are.
__________________
1998 American Eagle
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09-17-2014, 10:09 PM
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#10
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Junior Member
Newmar Owners Club
Join Date: Jul 2011
Posts: 15
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Quote:
Originally Posted by Ramets
Cummins may say to let the tranny do it's own shifting, but on a long grade you should shift it down til the RPM's are 1800-2100. You'll definately see a big difference in temps.
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Will do on the RPM'S thing next trip. Thanks much
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09-17-2014, 10:10 PM
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#11
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Junior Member
Newmar Owners Club
Join Date: Jul 2011
Posts: 15
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Quote:
Originally Posted by Gary RVRoamer
If its a rear radiator cooling system, odds are the radiator fins are dirty with oil-slick from the engine oil breather (aka "slobber tube"). Give it a good cleaning.
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Will do a degrease on the fins..Thanks much..
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09-17-2014, 10:12 PM
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#12
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Junior Member
Newmar Owners Club
Join Date: Jul 2011
Posts: 15
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Quote:
Originally Posted by mricet1005
I pulled this hill in early July in my Phaeton ISC 380 pulling a Ford Edge. No overheating problems. Did not manually downshift, transmission handled it adequately on its own. I tend to cruise around 63 mph and don't worry about speed going up mountains. I keep eye on temperature gauge and would manually downshift if needed as others have suggested. I wouldn't think you should have issues so check radiator fins and coolant levels as already mentioned.
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Thanks much.
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09-17-2014, 10:16 PM
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#13
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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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Clean the radiator stack, be sure and get between the CAC and radiator.
__________________
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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09-19-2014, 01:09 AM
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#14
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Junior Member
Newmar Owners Club
Join Date: Jul 2011
Posts: 15
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Quote:
Originally Posted by Mr_D
Clean the radiator stack, be sure and get between the CAC and radiator.
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Tell me more about cac and radiator stack. I am also Good Sam Life Member. Thanks..
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