Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > POWER TRAIN GARAGE FORUMS > Cummins Engines
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 09-05-2022, 05:00 PM   #1
Senior Member
 
Ken Thompson's Avatar
 
Monaco Owners Club
Join Date: Oct 2018
Location: Mulino, OR
Posts: 423
Best and worst Cummins ISL 400 engine years

Iím looking to buy an ISL 8.8 or 8.9 engine with the common rail fuel system and without the DEF system. What are the best and worst years to buy? Also, any opinions about buying new(reman), ones taken out of a crashed RV, or used ones that say they are ďgood runnersĒ?
__________________
Ready to retire and get out of Oregon
Ken Thompson 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 09-05-2022, 05:53 PM   #2
Senior Member
 
Join Date: Apr 2018
Posts: 2,318
I don't know if they sold any non egr common rail motors but I'll guess they did. The EPA allowed them a few years to sell one motor line without egrs. Cummins picked the isl, firetrucks actually have to be dependable I guess was the thinking.
shootist is offline   Reply With Quote
Old 09-06-2022, 09:10 AM   #3
Senior Member
 
BrianGlenn's Avatar
 
Country Coach Owners Club
Join Date: Apr 2015
Location: Alberta
Posts: 1,588
Best and worst Cummins ISL 400 engine years

The CM850 is a 8.9L ISL (mine is 400HP, 1250 torque, from factory) engine build Dec 16,2006. Common rail, VGR turbo - no EGR. In my 2007 Country Coach.

Starting Jan 1 2007 engine build dates, the ISL changed to 425 with EGR and DPF. Some do not like the DPF. I personally do not like EGR or DPF.

Jan 1 2010 engine build dates and later added DEF to meet EPA lowered NOX requirements.

EDIT - there were a bunch of ISL with wrist pin manufacturing issues. Itís on the top of this forum as a sticky thread , I believe.

Brian
__________________
Towr: 2007 Country Coach Allure 470 - 37 Sunset Bay Cummins 400 ISL, Coach #31563
Toad: 2016 F150 King Ranch - 3.5L EcoBoost 4x4 Supercrew (curb weight 4,775 lbs)
Toad: SOLD 2007 Jeep Grand Cherokee (yes, it has a Hemi) (curb weight 4,720 lbs)
BrianGlenn is offline   Reply With Quote
Old 09-06-2022, 09:00 PM   #4
Senior Member
 
Happycarz's Avatar
 
Monaco Owners Club
Join Date: Sep 2007
Location: Scottsdale, AZ
Posts: 2,286
I also have a non EGR 2006 ISL400, CM850, in my 08 coach.

When I ordered it in April 2007, Monaco gave me a choice of the ISL400 or ISL425, as they had three ISL400's left in stock.

After being told the difference between the two, it was a no brainer. Glad I did, as for the next two years Cummins kept updating software for a regen issue.

No EGR and no DPF, with CPL 1096. YIPPEE,
__________________
Harry

2008 Monaco Camelot 40' PDQ
Happycarz is offline   Reply With Quote
Old 09-21-2022, 07:53 AM   #5
Senior Member
 
jdw1's Avatar
 
Monaco Owners Club
Join Date: Jul 2018
Location: Minnesota
Posts: 216
Iím not sure what production years are the best, I spent 3 years researching coaches and engineís, transmissions, etc, ÖÖ not that I know everything but I ended up seeking out a one owner 05 Monaco Dynasty on a late 04 chassis built in 12/04, common rail ISL 400, non DPF, obviously non DEF.
My personal reasoning was this, up until 05-06 the economy was running full steam ahead and people were spending money, including manufacturers, most manufacturers (of most products) weíre moving forward, making there products better for the future, then obviously the economy started to slow a bit and everyone started holding back a bit as time went on. I believe there is a sweet spot in the 04 - 07 years where coach manufacturers were building exceptional production coaches and it was before the next tier of emissions was set to hit, I have heard that Monaco had purchased a large amount of engines from Cummins before the emissions were fully implemented and put them into chassisís that sat at the factory waiting for future production. I have no idea how to sort out what coaches were built on those chassis, I know in late 05 Cummins had the wrist pin issues and I wanted to be ahead of that but wanted a common rail fuel system, maybe more than you asked for but thatís my opinion. Iím certainly not saying anything against anyone out there with different options about different model years and different reasons, these are just my thoughts and Iím sure there are better choices for everyone, obviously everyoneís budget has a factor in the decision too!
__________________
05 Dynasty Platinum IV
19 Jeep JL Rubicon
Itís the journey not the destination!
jdw1 is offline   Reply With Quote
Old 09-22-2022, 07:22 AM   #6
Senior Member
 
Ken Thompson's Avatar
 
Monaco Owners Club
Join Date: Oct 2018
Location: Mulino, OR
Posts: 423
Good theory. I got my 2001 because it was a very good deal. Just slow
__________________
Ready to retire and get out of Oregon
Ken Thompson is offline   Reply With Quote
Old 09-24-2022, 04:44 PM   #7
Senior Member
 
tinman 55's Avatar
 
Join Date: Apr 2020
Location: So. California
Posts: 142
As Brian stated above, there are wrist pin failures (possible) with 2145 ISL 400's built between Oct 17, 2005 and April 18, 2006 with serial numbers in the range of 46543077 to 4660393. That said, if you can source a salvaged engine from a Foretravel, they were only sent 9 of those potentially affected units. Country Coach was delivered 94 of them. I purchased my 2006 Country Coach Sunset Bay with one of the units within the serial numbers above. My coach had impeccable maintenance records and a pre purchase check of all the fluids confirmed no indicated issues. I have my fluids checked annually when I complete my service of the coach and still, no indications of any issues. All that said, I love my 2006 pre EGR and DEF ISL.
__________________
Ray

2006 37' Allure Sunset Bay #31442
tinman 55 is offline   Reply With Quote
Old 09-27-2022, 11:18 PM   #8
Senior Member
 
Smitty77's Avatar
 
Join Date: Aug 2010
Location: Over the next hill, around the next curve...
Posts: 5,348
The CAPS era ISL's, usually in 370 to 400HP flashings, were also a good engine. Pretty much smog free. They did have Lift Pumps that would need to be replaced from time to time, or many went with a FASS system and bypassed the Lift Pump completely. And these engines were built and designed to run on Pre ULSD, Type II diesel. So adding some lubrication to your ULSD fuel, is not a bad idea to do. (Even with Bio fuels, having added lubrication is certainly not going to hurt.).

The Common Rails with VGT's starts to filter into coaches in the 2003 build years, but most of these were I believed considered 2004 models. (We had a CC Allure 2004, built Sept 2003, with a CAPS era ISL370 built in July 2003 - as an example.). As some manufactures had engines available from earlier years, so to be sure you know what you're buying. Get the specific coach Engine's Serial Number, and call Cummins to confirm what engine configuration you are looking at.

We were well pleased with the support of the CAPS era ISL. That being said, the Common Rail with VGT engines, do have both broader power ranges, as well as provide higher Braking Horse Power too - as the turbo vanes close off, and add higher Back Pressure.

Happy hunting,
Smitty
__________________
07 Country Coach Magna Rembrandt 45' ISX600
Roo II was our 04 Country Coach Allure 40'
OnDRoad for The JRNY! Enjoy life...
Smitty77 is offline   Reply With Quote
Old 09-29-2022, 10:09 AM   #9
Senior Member
 
Ken Thompson's Avatar
 
Monaco Owners Club
Join Date: Oct 2018
Location: Mulino, OR
Posts: 423
ISC to ISL engine swap

After having a seized tappet in my 2001 ISC350 8.3 I was determined to put the more powerful 8.8 ISL 400 in. After countless hours and days trying to find what will work, I have found a 2003 ISL400 with the same CM554 ECM unit. This makes the change easier. The newer ISL has the 2 stage jake which is hands down better than the near worthless pacbrake. Since the only difference between the ISC and the ISL is the ISL is a stroked ISC. All of the intake and exhaust is the same. That makes the swap easier as well. The problem comes when trying to get someone to do the swap. No Cummins shop will do it. They will only do like for like engine changes. I finally found a private shop in Eugene that will do the job. The used engine is coming from Visone RV salvage in Kentucky. From the reviews they are a trustworthy company to deal with. What ever you do stay away from JJ Rebuilders in Florida. They have very bad reviews and sell junk engines. The engine I am getting came out of a 45í Monaco Dynasty, so it should make my 36í Dynasty go up the hills a lot better. Now itís a waiting game till I get the engine and get it installed. I canít wait!
__________________
Ready to retire and get out of Oregon
Ken Thompson is offline   Reply With Quote
Old 09-29-2022, 10:17 AM   #10
Senior Member
 
paul65k's Avatar


 
Alpine Owners Club
Join Date: Nov 2015
Location: Lake Havasu City, AZ
Posts: 2,735
Quote:
Originally Posted by Ken Thompson View Post
After having a seized tappet in my 2001 ISC350 8.3 I was determined to put the more powerful 8.8 ISL 400 in. After countless hours and days trying to find what will work, I have found a 2003 ISL400 with the same CM554 ECM unit. This makes the change easier. The newer ISL has the 2 stage jake which is hands down better than the near worthless pacbrake. Since the only difference between the ISC and the ISL is the ISL is a stroked ISC. All of the intake and exhaust is the same. That makes the swap easier as well. The problem comes when trying to get someone to do the swap. No Cummins shop will do it. They will only do like for like engine changes. I finally found a private shop in Eugene that will do the job. The used engine is coming from Visone RV salvage in Kentucky. From the reviews they are a trustworthy company to deal with. What ever you do stay away from JJ Rebuilders in Florida. They have very bad reviews and sell junk engines. The engine I am getting came out of a 45í Monaco Dynasty, so it should make my 36í Dynasty go up the hills a lot better. Now itís a waiting game till I get the engine and get it installed. I canít wait!
Keep us posted please!
__________________
Paul & Jean
2001 Alpine 36FDDS (74291)-1600W Solar, 13,440Wh (525Ah @24V) LiFePO4
2019 Jeep Grand Cherokee Trailhawk (Hemi)
2006 Alpenlite 32RL - Sold
paul65k is offline   Reply With Quote
Old 09-29-2022, 09:47 PM   #11
Senior Member
 
jdw1's Avatar
 
Monaco Owners Club
Join Date: Jul 2018
Location: Minnesota
Posts: 216
Some pictures if at all possible, that would be interesting to see!

Thanks!
__________________
05 Dynasty Platinum IV
19 Jeep JL Rubicon
Itís the journey not the destination!
jdw1 is offline   Reply With Quote
Old 09-30-2022, 12:04 AM   #12
Senior Member
 
Ken Thompson's Avatar
 
Monaco Owners Club
Join Date: Oct 2018
Location: Mulino, OR
Posts: 423
Quote:
Originally Posted by jdw1 View Post
Some pictures if at all possible, that would be interesting to see!

Thanks!
What would you like pictures of?
__________________
Ready to retire and get out of Oregon
Ken Thompson is offline   Reply With Quote
Old 09-30-2022, 10:51 PM   #13
Senior Member
 
jdw1's Avatar
 
Monaco Owners Club
Join Date: Jul 2018
Location: Minnesota
Posts: 216
Quote:
Originally Posted by Ken Thompson View Post
What would you like pictures of?
Engine removal, engine removed, the new one installed, It just would be interesting to see!
__________________
05 Dynasty Platinum IV
19 Jeep JL Rubicon
Itís the journey not the destination!
jdw1 is offline   Reply With Quote
Old 09-30-2022, 11:57 PM   #14
Senior Member
 
saddlesore's Avatar


 
Foretravel Owners Club
Join Date: Apr 2016
Location: Home is Where WE PARK IT...
Posts: 5,479
Quote:
Originally Posted by Ken Thompson View Post
Good theory. I got my 2001 because it was a very good deal. Just slow
Ready to retire and escape the tax happy state of Oregon are You? [chuckles]
When wife retired in'19 from the state, We sold out, Became "Full Timer" RV'ers in our Motorhome [40' Foretravel Motor Coach], joined the Escapee's for our Mail forwarding service, and Declared South Dakota as Our "State Residence of Record".
NO Income Taxes of any kind [wife got an immediate 9.9% raise in her pension]
Low sales tax rates.
Becoming a SD Resident is stupud Easy..That even a retired truckdriver can do it!
(Spend one night in a campground and get the receipt, Have the letter from Escapees stating your new SD address and your mailing address.
Gather up Your Social Security card, birth cert's, and marriage license for the wife, then head to Drivers services building...30 minutes later You are a resident, registered to vote and have a new Drivers License in hand..


Then, You only have to return to the state every 5 years to have them take another picture for the drivers license renewal..
__________________
Retired truckdriver, Full Timing in a Foretravel.
Escapees of Box Elder, South Dakota
....Whether our shack is moving or parked.. We are still home.
saddlesore is offline   Reply With Quote
Reply

Tags
cummins, 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
Cummins ISL 400 Engine Failure FandM9973 Cummins Engines 20 07-13-2017 04:32 PM
2005 Cummins ISL 400 or 2015 ISL 450??? canes1 iRV2.com General Discussion 4 08-20-2015 02:42 PM
Cummins ISL 400 Engine Warm when garages jbialy Fleetwood Owner's Forum 8 07-28-2015 05:38 PM
Are Cummins fuel and air filters the same? 350 ISL. compared to 400 ISL ? DGBPokes Cummins Engines 4 06-04-2015 06:40 PM
Stop engine light Cummins ISL-400 Dutch Star David Cummins Engines 4 06-09-2009 04:33 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 04:49 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.