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
 
Thread Tools Search this Thread Display Modes
 
Old 05-05-2009, 05:00 PM   #1
Senior Member
 
tigersharkjd's Avatar
 
Winnebago Owners Club
Freightliner Owners Club
Join Date: Apr 2009
Posts: 162
Cummins Temp and Slobber Tube

I contacted Freightline regarding a slobber tube extension kit for my Cummins 425 ISL. I was told this 2007 engine does not have a slobber tube, as it is actually recycled back through the engine. They indicated on earlier ISL and Cat engines there was an issue with the slobber tube venting into the radiator airflow. I called Freightliner because of the many comments regarding over heating and having to clean the radiator, input fans, etc. The simple green application and spraying (no pressure sprayer) inward and outward periodically was recommended, even though I have no slobber tube venting. They indicated that my engine, due to environmental protections will run a little warmer, but should not exceed 215. The downshift on the uphill grades and keeping RPMs between 1500 and 2000 was suggested as a cooling effect. I wanted to just pass on the information I received for my particular situation, as I know this is a much discussed topic.
__________________

__________________
JB and PS
2013 Winnebago Tour
tigersharkjd 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 05-05-2009, 08:31 PM   #2
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 19,625
Most ISL's are installed with a side radiator and the slobber tube is not an issue anyway. It is the rear radiator configuration (more common with the ISC than the ISL) that has a problem with spraying the slobber onto the radiator and anything towed behind the coach.
__________________

__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 05-06-2009, 09:51 PM   #3
Registered User
 
Join Date: Feb 2008
Posts: 266
The 425-07 engine has a closed crankcase ventilation system, so no slobber tube. It does however, have a filter in that system that has to be replaced periodically. The filter can be seen sitting flat above the valve cover on the transmission end of the cover. The filter has 13 bolts holding the cover on it and can be reached from the bedroom access very easily.

The folks at Freightliner in Gaffney did not have any information on the filter, didn't know where it was, and didn't even know it was a time/mileage change item. This is specified in the Cummins engine book. Furthermore, Freightliner had no filters. Said I'd have to go to Cummins for that.

John
Pigman is offline   Reply With Quote
Old 05-09-2009, 06:51 AM   #4
Senior Member
 
tigersharkjd's Avatar
 
Winnebago Owners Club
Freightliner Owners Club
Join Date: Apr 2009
Posts: 162
Pigman please post what you hear from Cummins on this filter and the change intervals. Thank you.
__________________
JB and PS
2013 Winnebago Tour
tigersharkjd is offline   Reply With Quote
Old 05-10-2009, 06:55 PM   #5
Registered User
 
Join Date: Feb 2008
Posts: 266
I have not contacted Cummins yet but this is what I've found in my Cummins book.

The Crankcase filter carries Cummins Part Number 4939749, or Fleetguard CV 5060300. These numbers are correct as I have removed the filter cover on my 425 ISL EPA 07 engine and this is the filter I found in there.

According to our manual, the filter should be replaced each 60,000 mi or 2 years, but under the 80,000 mi or 2 year column, there is also an entry saying the crankcase filter needs to be replaced at that interval. One of these days I guess I'll call Cummins and ask them to clarify the 60,000 vs 80,000 mile issue. Based on my examination of my filter I think these numbers are quite conservative, but everyone will have to decide this point for themselves.

John
Pigman is offline   Reply With Quote
Old 05-15-2009, 10:41 PM   #6
Senior Member
 
powerboatr's Avatar
 
Damon Owners Club
Freightliner Owners Club
Join Date: Mar 2006
Location: North East Texas
Posts: 4,072
Quote:
Originally Posted by tigersharkjd View Post
I contacted Freightline regarding a slobber tube extension kit for my Cummins 425 ISL. I was told this 2007 engine does not have a slobber tube, as it is actually recycled back through the engine. They indicated on earlier ISL and Cat engines there was an issue with the slobber tube venting into the radiator airflow. I called Freightliner because of the many comments regarding over heating and having to clean the radiator, input fans, etc. The simple green application and spraying (no pressure sprayer) inward and outward periodically was recommended, even though I have no slobber tube venting. They indicated that my engine, due to environmental protections will run a little warmer, but should not exceed 215. The downshift on the uphill grades and keeping RPMs between 1500 and 2000 was suggested as a cooling effect. I wanted to just pass on the information I received for my particular situation, as I know this is a much discussed topic.
freightliner or cummins actually said to use SIMPLE green on the alum radiator?
IMO as a corrosion entity, this seems a bit on the wrong side.
a. most folks use WAY to much simple green or never dilute it.
b. most folks NEVER ever get it all rinsed off
c. the simple green residues will cause hydrogen embrittlement to aluminum structures and the the thinner the metal the faster to fail, especially areas of stress like the alum to copper joints or alum to plastic joints.

d simple green is a great fairly earth friendly cleaner, but it has to be diluted and RINSED and RINSED and RINSED again to get it off with no residue
__________________
USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, no your eyes are fine, there are really 6 slides
2016 Expedition Toad on Hauler flat bed
powerboatr is offline   Reply With Quote
Old 05-16-2009, 10:18 AM   #7
Moderator Emeritus


 
Monaco Owners Club
Excel Owners Club
Join Date: Nov 2006
Location: Hangin' with Sacs and the Pins
Posts: 9,413
Quote:
Originally Posted by RV Roamer [Gary] View Post
Most ISL's are installed with a side radiator and the slobber tube is not an issue anyway. It is the rear radiator configuration (more common with the ISC than the ISL) that has a problem with spraying the slobber onto the radiator and anything towed behind the coach.
I want to say that maybe "Some ISL's are installed with a side radiator" because I know Monaco Diplomats & HR Endeavors are very popular RVs - and I know for a fact that our radiator is not on the side...and YES ... we have an ISL engine with a slobber tube.

MM



__________________
MM
*MonacoMama with the 2 Pins & SacsTC Nearby*
*2007 Monaco Diplomat 40' SFT<>2006 Chevy VortecMax Toad<>2006 Buick Lucerne Leading the Way*
MonacoMama is offline   Reply With Quote
Old 05-16-2009, 03:36 PM   #8
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 19,625
Yes indeed, MM. Monaco uses a rear radiator with the ISL in the Diplomat/Endeavor. When they upgraded the engine in the Diplomate/Endeavor from the ISC back around 2004, they stuck with the rear radiator for some reason. Most manufacturers use the side radiator with the ISL cause it needs a lot more cooling and the side rad can more easily meet that need.

I'll stick with my claim, though. I still think MOST coach manufacturers use a side rad with an ISL.
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is offline   Reply With Quote
Old 05-16-2009, 03:42 PM   #9
Registered User
 
Join Date: Feb 2008
Posts: 266
And the ISL 425HP-EPA07 engine has a closed crankcase ventilation system. No slobber tube.

John
__________________

Pigman is offline   Reply With Quote
Reply



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
2004 Journey with CAT 330hp overheating on long pulls Golfingene Winnebago Industries Owner's Forum 38 05-07-2009 12:06 PM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:33 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.