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07-05-2020, 11:12 AM
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#1
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Senior Member
Join Date: Feb 2018
Posts: 623
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Which diesel? Longevity, driveability, mileage and service?
There's many small diesel engine manufacturers out there; Cummins, Ford and Mercedes.
Which one is going to go the distance and provide the best experience???
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07-05-2020, 11:15 AM
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#2
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Senior Member
Join Date: May 2017
Location: Vancouver Wash
Posts: 7,227
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This '99 24 valve Cummins is still running strong at 220,000!
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07-05-2020, 11:16 AM
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#3
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Senior Member
Forest River Owners Club Ford Super Duty Owner
Join Date: Jul 2012
Location: So Calif
Posts: 3,536
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Is your question about diesel powered motorhomes or pickup trucks used as a tow vehicle?
__________________
2020 Coachmen Leprechaun 270QB (COA Member)
Jeep Wrangler toad for the dirt
"Well done is better than well said"....Ben Franklin
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07-05-2020, 12:12 PM
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#4
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Senior Member
Join Date: Feb 2018
Posts: 623
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Diesel powered motorhomes
Quote:
Originally Posted by egwilly
Is your question about diesel powered motorhomes or pickup trucks used as a tow vehicle?
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Really, does it matter? I'm just talking about the diesel engine?
A few years ago, I considered an inline 5 cylinder Ford diesel 3.2 ...it seemed a little rough and unrefined for me compared to my 3 litre V6 Mercedes.
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07-05-2020, 12:14 PM
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#5
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,794
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It seems to me that the Cummins engine has the best reputation, but that's just me!
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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07-05-2020, 12:27 PM
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#6
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Senior Member
Entegra Owners Club
Join Date: Nov 2012
Posts: 8,149
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They are all good, and built to last much longer than any RV'er will need them to. However, the V6 diesel in my wife's Mercedes sedan required expensive parts replacements starting at about 50,000 miles. Mercedes dealers are used to getting well paid for their parts and labor.
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Marc and Jill, Wellington FL
2013 Entegra Anthem 44SL
2018 Lincoln MKX
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07-05-2020, 01:06 PM
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#7
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Senior Member
Join Date: Feb 2018
Posts: 623
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Be more specific....
Quote:
Originally Posted by MRUSA14
They are all good, and built to last much longer than any RV'er will need them to. However, the V6 diesel in my wife's Mercedes sedan required expensive parts replacements starting at about 50,000 miles. Mercedes dealers are used to getting well paid for their parts and labor.
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Don't just generalize , what parts? You're not talking about engine problems, I don't think.
Tell me exactly what you are talking about and, the engine in the car is NOT the same thing as the Sprinters.
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07-05-2020, 01:21 PM
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#8
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Senior Member
Join Date: Aug 2018
Location: Sarasota, FL
Posts: 148
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Cummins probably has the most dedicated fans. Im delighted with our F350 diesel. It’s our first and is quieter and smoother than I ever imagined a diesel truck would be.
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07-05-2020, 01:45 PM
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#9
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Senior Member
Join Date: Aug 2011
Location: Enjoying the Western States!
Posts: 19,794
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We've had two Cummins... truck and motorhome. No repairs on either and we had each for eight years.
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Full-timed for 16 Years . . .
Traveled 8 yr in a 2004 Newmar Dutch Star 40' Diesel
& 8 yr in a 33' Travel Supreme 5th wheel
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07-05-2020, 04:28 PM
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#10
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Senior Member
Texas Boomers Club Holiday Rambler Owners Club
Join Date: Jun 2002
Location: What? Like right now? ;-)
Posts: 1,302
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It usually doesnt come down to a choice of a powerplant anymore. They are packaged with specific chassis/floorplan even more now than ever.
Early mercedes diesels in sprinters were underpowered and had exhaust gasket problems.
Early cummins 5.9s were fine for 10to 15K weights but when you push them to 25K and then try to add fuel and boost they can be overloaded from a physical block standpoint.
The 6.7 cummins were better but they had VVT issues and also big time issues with DEF and DPF.
Powerstrokes in fords and IHs had problems with oil flow on the injector actuators along with pump probs.
ISL cummins had issues with wrist pins for early serial numbers
All CATs that had the HEIU fuel pump suck.
The rule of thumb is find the floorplan (good selections from Holiday Rambler/Monaco and also Dutch star/Alegro Bay in the early 00s) that best meets your needs and then learn what the specific issues exist for that chassis.
The older the chassis is the less emission controls (again early circa 2000-2005 the best) that exist but you will also deal with all the other issues from age.
Having said all that I love my ISC - it just runs - and gets about 9mpg with no toad.
G/L
__________________
2003 Scepter 40PDBB - Roadmaster RR8S - Cummins ISC350 - purch aug16
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07-05-2020, 04:39 PM
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#11
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Registered User
Join Date: Mar 2019
Posts: 1,336
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I think the OP is just trolling
There are diesel forums where he can get in over his head quickly
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07-05-2020, 04:45 PM
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#12
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,713
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The things that are likely to fail early aren't basic engine components like pistons or crankshafts. It's water pumps, fuel pumps, radiators, etc. Cummins, Cat, Volvo, etc. all build great engines, but most of the rest of the stuff comes from the chassis builder.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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07-05-2020, 04:53 PM
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#13
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Senior Member
Alpine Owners Club
Join Date: Oct 2019
Location: Hoodsport Wa
Posts: 3,147
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One retired mechanics opinion based on longevity/serviceability:
1) Cummins
2) Duramax
3) Ford (pick one, they've made three in the last decade or so, absolutely the least serviceable)
4) Mercedes (only last because lack of real world experience, but our fleet had a handful of blutec diesel Sprinters with no issues)
__________________
2000 Alpine 36 FDS #74058
04 Jeep Wrangler TJ
"On the road to find out..."
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07-05-2020, 05:08 PM
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#14
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Senior Member
Join Date: Mar 2019
Location: Florida Gulf Coast
Posts: 288
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My friend swears by his Volvo diesel with a 10 speed automatic in his 18 Wheeler work truck. 300,000 miles and still running strong and pulling 80,000 GVW loads. He has had most every brand diesel made in his trucks over the years. Prevost coaches uses Volvo in thier coaches with automatic transmission’s....
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