Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 11-21-2015, 09:34 AM   #1
Senior Member
 
Wbonsell's Avatar
 
Join Date: Sep 2014
Location: Poulsbo, WA
Posts: 431
Consensus on best diesel engine?

We are contemplating upgrading to a DP...probably in the 98-03 range. Liking Foretravel, American Eagle, Dynasty, etc. Is there a consensus on the best diesel engine. Pretty sure we want a side radiator unit. 36-40 footer. A 36' single slide Foretravel would be my #1 choice.
__________________

__________________
Bill and Debb---2010 CT Coachworks Siena 35V
1999 Jeep Cherokee Sport---Roadmaster Falcon 5250 -
1 Cavalon (Scooby)
Wbonsell is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 11-21-2015, 10:03 AM   #2
Senior Member
 
Join Date: Mar 2009
Posts: 448
In that age range, the previous care & use of the engine will be much more important than the brand name on it.
There are very few or no folks who have used 3 different diesel engine brands over a time period long enough to do comparative analysis. So, the "best" is a purely limited personal opinion. My opinion is that they are all good, your chances of getting a lemon are equal with any brand name, and your best way to minimize future engine issues is to assure that you and the previous owner religiously perform all recommended routine maintenance items.
__________________

__________________
Jim2 is offline   Reply With Quote
Old 11-21-2015, 10:09 AM   #3
Senior Member
 
Join Date: May 2010
Posts: 789
In almost 7 years of operation and 40K miles, my trusty mechanical C8.3 engine has been 100% trouble free.

Won't say that it is the best, but it is very very good!
__________________
DaveS
1998 American Eagle 40EVS
FormerBoater is offline   Reply With Quote
Old 11-21-2015, 10:37 AM   #4
Senior Member
 
Monaco Owners Club
Join Date: Apr 2009
Location: Where ever we stop
Posts: 537
I've had Cummins, CAT, and now a Detroit. All three are great, if properly taken care of. Overall, if I had to make a choice, I think I'd choose my current Detroit as my favorite. But then again, both the two Cummins I've had were good and never really had any problems. The CAT did like to burn a little oil.

You have to look real hard at the maintenance records when choosing one as old as you're talking about. All three brands are good!
__________________
Chet
Monaco 2004 Signature 45' Castle IV Detroit 60
Towing 2015 Jeep Grand Cherokee diesel
super_rep is offline   Reply With Quote
Old 11-21-2015, 11:35 AM   #5
Community Moderator
 
barmcd's Avatar


 
Monaco Owners Club
Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 4,403
I'm doing the same exercise and think I want a Cummins 8.3 or 8.9 L, mainly because I want a side radiator.
__________________
barmcd is offline   Reply With Quote
Old 11-21-2015, 11:43 AM   #6
Senior Member
 
mhbell's Avatar
 
Thor Owners Club
Ford Super Duty Owner
Georgie Boy Owners Club
Join Date: Feb 2011
Location: Ogden Utah
Posts: 523
What would be the reason for choosing a side radiator over a rear one on a DP is one better than the other? I don't have a DP but am curious.
Mel
__________________
2017 Forest River EVO 2360 TT Towed with a 2011 Ford F-250 Super Cab Heavy Duty 4WD Towing Package, Blue OX Sway Pro Hitch.
http://www.rvbloggers.wordpress.com
mhbell is offline   Reply With Quote
Old 11-21-2015, 11:48 AM   #7
Senior Member
 
Steve Ownby's Avatar
 
Join Date: Nov 2008
Location: Cosby, Tn
Posts: 6,397
Quote:
Originally Posted by Wbonsell View Post
We are contemplating upgrading to a DP...probably in the 98-03 range. Liking Foretravel, American Eagle, Dynasty, etc. Is there a consensus on the best diesel engine. Pretty sure we want a side radiator unit. 36-40 footer. A 36' single slide Foretravel would be my #1 choice.

Can't speak to best and on this age range, prior maintenance means everything. I know Monaco's very well and consider the Dynasty to be an excellent value in terms of "bang for the buck". In '03 even the short coaches had a tag axle.

http://www.monacocoach.com//library/...03_Dynasty.pdf




Steve Ownby
Full time since '07
__________________
Steve Ownby
Full time since 2007
2003 Monaco Signature
Steve Ownby is offline   Reply With Quote
Old 11-21-2015, 12:00 PM   #8
Senior Member
 
Mr_D's Avatar
 
Solo Rvers Club
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 28,515
I'd have to nominate the '07 EPA version of the ISX 650 as the worst! Ours dropped a valve in #6 at 14,000 miles, and again at 45,000 miles and is on it's third turbo. First one was under warranty, second one was not and they are expensive to repair too.

Before that we had the CAT 3126 and other than a lack of torque (for my wants anyway) was a good engine.
Then we had an ISC 350 and it was good too.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 CR-V
Mr_D is offline   Reply With Quote
Old 11-21-2015, 12:05 PM   #9
Senior Member
 
Gordon Dewald's Avatar
 
Winnebago Owners Club
Join Date: Mar 2014
Posts: 10,166
It all has to do with personal experience. Everyone will form some kind of opinion from that. There are a few engines that have not performed well but overall most are good. Maintenance is key.
__________________
Gordon and Janet
Tour 42QD/inTech Stacker
Gordon Dewald is offline   Reply With Quote
Old 11-21-2015, 12:06 PM   #10
Senior Member
 
dennis45's Avatar


 
Join Date: Jun 2012
Location: BC
Posts: 6,467
Quote:
Originally Posted by Jim2 View Post
In that age range, the previous care & use of the engine will be much more important than the brand name on it.
There are very few or no folks who have used 3 different diesel engine brands over a time period long enough to do comparative analysis. So, the "best" is a purely limited personal opinion. My opinion is that they are all good, your chances of getting a lemon are equal with any brand name, and your best way to minimize future engine issues is to assure that you and the previous owner religiously perform all recommended routine maintenance items.
X2,
__________________
Dennis & Carol
2003, 4006, 41' DutchStar, Spartan, ISC 8.3L W/BanksPower - 2013 Honda CRV, BlueOx Baseplate, Aventa Bar & Patriot Brake. And the 04 Bird, Sunshine Car.
dennis45 is offline   Reply With Quote
Old 11-21-2015, 01:00 PM   #11
Senior Member
 
Jim_HiTek's Avatar
 
Join Date: Nov 2011
Location: Full time RV'er
Posts: 1,659
Quote:
Originally Posted by mhbell View Post
What would be the reason for choosing a side radiator over a rear one on a DP is one better than the other? I don't have a DP but am curious.
Mel
A side rad is preferred by some owners because it's easier to work on or service their own engine without the rad in the way. This side rad construction is by necessity, more complex, with hydraulic fans and pressurized hoses steering hydraulic fluid to power the fans. Also, many complain of the cloud of dust the side fans create as you leave the freeway and enter a campground so there's a DIY method to fix that. Doubtful any manufacturer will ever do it.

A rear rad is acceptable to those who don't do a lot of work on their own rigs. Older diesel engines use to have a slobber tube where engine oil and some exhaust was blown out, this would mix with road dirt and grime and coat the rear rad. So it would need to be clean regularly. Others, like me, just put in one less quart of oil during a change. No blown out oil. Haven't had to clean the rad for years now. It is right there in the way though so sometimes I (or a shop) have to access the engine from under the bed. I got a quote once on rodding the rad and the shop told me 1 hour remove, 1 hour replace, so just 2 hours extra if your engine needed that kind of extensive work requiring the rad be removed. Unlikely.

So, your choice is potentially either assume the problems associated with a rear rad or those with a side rad. Neither is perfect. I would NOT base my purchase on where the rad was positioned alone. It's not all that important.

__________________
'02 Winnebago Journey DL, DSDP, 36' of fun.

Visit my RV Travel & Repair Blog at : http://chaos.goblinbox.com
Jim_HiTek is offline   Reply With Quote
Old 11-21-2015, 01:49 PM   #12
Member
 
Join Date: Jun 2013
Posts: 43
I think the Detroit Diesel 6V92 and 8V92 series make the best music, or were you asking about other criteria?
__________________
Len
LDMcL is offline   Reply With Quote
Old 11-21-2015, 02:45 PM   #13
Community Moderator
 
barmcd's Avatar


 
Monaco Owners Club
Texas Boomers Club
Join Date: Nov 2015
Location: Central Texas
Posts: 4,403
Quote:
Originally Posted by mhbell View Post
What would be the reason for choosing a side radiator over a rear one on a DP is one better than the other? I don't have a DP but am curious.
Mel
There are a few, number one is cooling capacity. HP and torque generate heat that has to be dissipated and a side radiator is more efficient than a rear radiator. I've heard that 350 hp is about the limit for a rear radiator coach and that's pretty much been my experience. I haven't seen a 400 hp rear radiator motor home and I've seen 315 hp and up with a side radiator.

The second reason is ease of maintenance. I'll do most of the work myself and I think I can do most anything that doesn't involve rebuilding the engine. A side radiator makes getting to the engine a lot easier. It's also cheaper if you have someone else do it because you don't have to remove the radiator for everything.

The third reason is maintaining cooling efficiency. A side radiator isn't as prone to picking up dirt an debris which blocks the fins. It's also easier to clean.

A side radiator does add complexity and another source of potential failure, but for me the benefits outweigh the disadvantages.

YMMV.
__________________
barmcd is offline   Reply With Quote
Old 11-21-2015, 02:59 PM   #14
Senior Member
 
ecurb74's Avatar
 
Join Date: Feb 2013
Posts: 233
The Cummins ISM (M11) is hard to beat. Plenty of HP and torque, especially in a 36 ft motorhome. Couple that with the Allison HD4060 transmission with retarder and you don't have to worry about towing or hills. Nothing like horsepower! Like most other engines take care of them and they will out last you.


Bruce & Teresa
2000 Foretravel U320 4010
Cummins ISM 450hp
Allison HD4060R 6 Spd W/Retarder
__________________

__________________
Bruce & Teresa
2000 Foretravel
U320 4010
ecurb74 is offline   Reply With Quote
Reply

Tags
diesel, engine



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Check Engine Light and cruise control crkoral Class A Motorhome Discussions 11 10-26-2015 08:31 PM
New Cummins Diesel engine suiteowner Cummins Engines 32 03-11-2015 09:19 PM
Diesel engine for short trips? monkey Trailer Towing and Tow Vehicles Discussion 39 09-29-2014 11:54 AM
Having issues.... Diesel engine sputtering and coughing vanbuskirk Class A Motorhome Discussions 62 08-03-2014 05:04 PM
Diesel engine starting issues. lbaldwin Monaco Owner's Forum 6 02-18-2014 04:20 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:24 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.