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.
  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 03-18-2015, 05:28 PM   #1
Junior Member
Join Date: Nov 2009
Posts: 4
Belt & Hoses Replacement Cost

Hi All:

I want to replace the belts and hoses on my 2008 Monaco Diplomat with 55K miles.

It has a Cummins 400 ISL with a rear radiator.

I would really appreciate knowing what cost I should expect for this work.

Many thanks.

Jeff T.
2008 Diplomat 40 PDQ
Fair Oaks Ranch, Texas

TXTURNER 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 03-18-2015, 06:14 PM   #2
Senior Member
Join Date: Sep 2010
Posts: 1,888
There are a lot of hoses that should be checked and if needed be replaced which will effect the cost a lot. The heater hoses can be a big project if they also need replacement. Just did hoses and belts on ISM 500 and the hoses and belts were almost 200$ not including heaters and 1/4 vent hoses. It was a 5 hour project which would equal about 500$. I would thing you are looking at 500 to 650$. Do do it so you aren't broke down or damage engine.

tom chelbana is offline   Reply With Quote
Old 03-21-2015, 08:59 AM   #3
Junior Member
Join Date: Nov 2009
Posts: 4
Thanks, Tom, for the response. I'm looking specifically for info from people with rear radiator coaches.
TXTURNER is offline   Reply With Quote
Old 03-21-2015, 11:20 PM   #4
"Formerly Diplomat Don"
Dutch Star Don's Avatar
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 9,278
"TXTURNER"....I changed mine on my 05 Diplomat 400 ISL myself. You didn't say if you're doing it yourself or having it done. I didn't want to chase all the special hoses and I wanted to convert to silicone because I was looking to reduce the stress the hoses were putting on the radiator.....a radiator mounting issue with Monaco. The silicone hoses flex more readily. I had a leaky radiator that I had to replace because it was too rigidly mounted.

Here's what I did. I looked at the hoses and determined, for example, the lower radiator hose was 12" with a 90 degree bend and 6" more of straight hose. I was able to go to a website and buy several hoses that fell into the sizes I needed and some had extra inches on them that were used where short straight pieces were needed. I ordered the hoses and did the change myself. I know this doesn't help you much, but here are some of the hoses you need to change....I would leave the heater hoses alone. You have upper and lower radiator hoses. A short hose on top for the thermostat. The radiator hoses, underneath are plumbed into and out of your trans cooler, so there are two more hoses there.

On your coolant tank, there are two small hoses, that run over to the turbo and back. Those should be changed. There us also one large hose under the coolant tank, odd size straight piece that Napa sells.

I'm guessing if you pay to have it done, probably about 4-5 hours of labor, plus coolant and hoses.
Don & Mary
2014 Newmar Dutch Star - All Electric - 450 ISL
2016 GMC Canyon 4WD Crew Cab
Dutch Star Don is offline   Reply With Quote
Old 03-21-2015, 11:31 PM   #5
Senior Member
Mr_D's Avatar
Solo Rvers Club
iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 28,382
Just be sure if you go to silicone hoes that you DON'T use a coolant with sodium 2-ethyl hexonate. This is an acid that can eat the hoses and clog the radiator. Cummins ran into it on some ISL's in trucks.
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 03-23-2015, 07:40 AM   #6
Junior Member
Join Date: Nov 2009
Posts: 4
Many thanks, Dutch Star Don & Mr-D, for the very helpful info!

TXTURNER is offline   Reply With Quote

ace, replace, replacement

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
Fan belt without the A/C ron55 Workhorse and Chevrolet Chassis Motorhome Forum 20 05-16-2017 03:12 AM
2007 45 select Fan Belt Problem Cayne Travel Supreme Owner's Forum 6 06-08-2014 12:34 PM
Slide gear motor replacement - CHEAP Ron @ HHI Travel Supreme Owner's Forum 3 06-06-2014 02:48 PM
Power Gear Hose Replacement On Rear Jacks 98FPA Fleetwood Products Owner's Forum 6 03-12-2014 06:30 PM
ISL Serpentine Belt Change Procedure?? smlranger Cummins Engines 7 02-17-2014 03:24 PM

» Virginia Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 08:15 AM.

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