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 05-29-2009, 10:26 AM   #1
Junior Member
Join Date: Jul 2008
Posts: 16
Lightbulb Diesel algae problem

Just got word from my Cummins repair shop that due to algie growth in my fuel tank that I need a new lift pump and my fuel line needs to be re routed in order to install a pre filter. This problem is on the rise due to low sulphur diesel fuel especially in southern states or vehicles that have fueled in southern locations. This is a costly repair $2000.00 that could be avoided with the addition of a pre filter and the use of some fuel additive, and of course the knowledge of this problem which niether the dealerships or the government are handing out. If anyone else has experienced this please respond ,I would like to get your thoughts. PO"D IN VA

ub40 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 05-29-2009, 03:49 PM   #2
Senior Member
Fred and Bonnie's Avatar
Workhorse Chassis Owner
Join Date: Jan 2002
Location: Pacific Northwest or SoCal
Posts: 2,866
Send a message via ICQ to Fred and Bonnie
I don't want to sound harsh, the problem with algie and water are very well know problems with diesel fuel.

You need to keep close tabs on a diesel fuel system.

Fred and Bonnie
2005 Dolphin LX 6375
Abby, Ruffles & Scarlett, "The Cats"
Fred and Bonnie is offline   Reply With Quote
Old 05-30-2009, 03:01 AM   #3
Community Moderator
RV Wizard's Avatar

Country Coach Owners Club
Appalachian Campers
Gulf Streamers Club
Join Date: Mar 2000
Location: Chattanooga, Tn.
Posts: 12,062
Keeping the fuel fresh and the tank full is the best. Next would be to use something like Algae-X. They also make filter systems that will clean the fuel.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7
RV Wizard is offline   Reply With Quote
Old 05-30-2009, 09:06 AM   #4
Moderator Emeritus
Gary RVRoamer's Avatar

Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,632
I've never heard of algae harming a lift pump either, but I suppose it is possible of some of the crud gets through the filter. Algae clogs the filter quickly, but that's what filters are for. The opre-filter will get clogged too, but the secondary hopefully stays ok.

And most coaches already have a pre-filter. There was a period of about 18 months where Freightliner was installing only one filter (roughly 2003 thru 2004) with permission form Cummins, but they went back to a pre-filter + final filter combo after problems arose. I have one of the single filter coaches but have never had a problem. I do use an algaecide when the coach sits for awhile, but don't bother when I am runing it regularly and keeping things stirred up.
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 05-30-2009, 02:33 PM   #5
Senior Member
Join Date: Nov 2006
Location: Grayson, GA
Posts: 862
I am wondering if the problem is algae or just the crud that the new diesel "cuts" lose from the tank and the fuel lines -- lots of problems with that due to the new Ultra low diesel. I installed a dual filter system on my MH just because of that problem. I also use an additive with about every other fill to help with any moisture and algae problems. After two fill ups with the new diesel and after the new filter system installed, the "pre-filter" had to be changed due to clogging up with the "crud." changed out both filters at the same time just to be careful. The dual filter set up cost right at $500.00 at Cummins South and included the re-routing of fuel lines, wiring in the new sensor, mounts, both new filters, and labor.
Dave and Karen -- '02 Ultimate Advantage 36 C, 350 HP Cummins, Allison 3060 Tranny
'07 Ford Escort, Brake Master 4160, '13 Ford Edge, InvisiBrake
David K is offline   Reply With Quote
Old 06-03-2009, 11:06 AM   #6
Senior Member
Join Date: Jan 2008
Location: Big Bear Lake, Ca
Posts: 912
Diesel fuel is a fraction of crude oil that is wet as is Jet A. The removal of sulfur would not effect microbial life. Algae growth in wet fuels is common and has been known forever. The use of diesel additives that inhibit microbial growth is also a very old practice. Proper filter maintenance and the use of a quality fuel additive should eliminate algae problems. Buying from high volume sources is also recommended.

BTW there two sources of petroleum based diesel. Diesel based on high paraffinic crude, high gravity, has a yellow sweet smelling appearance and normally has a high cetane number. Diesel based on low gravity crudes are root beer colored and usually a fowl smell, they have been cracked, and require cetane improvers to meet specifications.

Forest Grump is offline   Reply With Quote

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
Hazard Flasher Problem Ms. Jean Thor Industries Owner's Forum 17 08-28-2014 04:54 PM
Onan Quiet Diesel Problem Need Help bdpreece MH-General Discussions & Problems 3 01-09-2008 06:07 PM
A Rather Odd A/C Problem ( a bit long) gasbag MH-General Discussions & Problems 7 10-16-2007 10:10 AM
Help! -- Diesel Leak OldForester Alpine Coach Owner's Forum 3 08-19-2007 05:49 PM
Brake problem caused by Florida atmosphere Stockwill Workhorse and Chevrolet Chassis Motorhome Forum 13 09-17-2006 06:07 AM

» Featured Campgrounds

Reviews provided by

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:41 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.