klm
SIOUX FALLS, SD
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Joined: 05/26/2004
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I have a cummins 5.9 isb on a '02 Newmar w/83k miles. I am currently parked for the snowbird season, on concrete. I can see what appears to be 4 oil drips on the concrete. I crawled under and I can see evidence of a leak, but I am so engine ignorant it's pitiful. So, when the season is over, I will take it to Cummins Coach Care - but I would appreciate any input about oil leaks - what, where, why, and HOW MUCH $$$$. I had the coach serviced by cummins in Nov, prior to traveling from NJ to FL for the winter. There was no indication of a leak at that time. Thanks for any insight you can offer to the mechanically challenged.
'02 KOUNTRY STAR DP
2012 HONDA FIT "PUMPKINMOBILE"
GILLIGAN- 1ST MATE CAT - 3 HR TOUR
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Dog Trainer
Richmond Mi.
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Joined: 08/17/2006
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I had a significant oil leak on my b 5.9 last season.I found a couple of the timming cover bolts loose. I tightened them and no more leak. It could be the oil pan has some loose bolts. Cummins will certainly find the leak. If it just tightening some bolts and a few hrs to diagnose you will probably be charged about 85.00 per hr. (don't hold me to it)You can save some money if you are willing to crawl around and try to locate the leak or general area and a bunch more if you take a torque wrench and check the oil pan, timming cover and the gasketed areas. In the end if you find the leak and don't want to mess with it at least you can point out the spercific area and ask for an estimate.
93 Airstream 35' Dp
5.9 230 uprated to 300 HP
Allison MD 3060
Dutchess and Shadow Golden's Daktari Cavalier King Charles (fur Bearing Children)
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troll3193
SouthWest, MI USA
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Joined: 07/07/2004
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i don't have a motorhome, but do have a 5.9l in my truck.
I have a small leak on my rear main seal..
I don't see drips on my driveway, but i do have moisture on the bottom of the bell housing. Dealer has looked at it and said they don't believe it is worth fixing yet. Considering it would be on my dime, I appreciated that...
bryan
2006 RAM 3500 MegaCab w/Cummins Turbo Diesel
Mopar Exhaust Brake
2004 Dutchemen 31BK
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powderman426
ohio
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Joined: 06/28/2010
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the front seal is sometime known to leak. If it looks oily on the front cover, chances are thats the problem. If just a few drops I wouldn't worry about it. Just keep an eye on oil level. 
Ron & Charlotte
28' Prowler & 05 Ram QC LB
I started with nothing and I still have most of it left
I never fail, I just succeed in finding out what doesn't work
.JPG)
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ScottG
Bothell Wa.
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Joined: 02/25/2005
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You have a draft tube that may or may not have a catch bottle. This tube is from the crankcase vent system and it's normal for it to drip oil if it doesn't have a bottle or if the bottle is full (should be emptied at oil change).
Scott, Grace and Wesly
2003 Dodge 3500 4x4, 6 speed Cummins (lightly bombed),
2004 Forest River 25RKS many, many mods.
H0NDA eu2000i
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eHoefler
ozark mountains
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Joined: 10/22/2011
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I would second the road draft tube.
2010 Ram 3500, Crew Cab, Long bed, 4 x 4,Dually, Lights & Siren!
2006 40' Landmark Mt. Rushmore
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wcjeep
Tacoma, Wa
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Joined: 04/11/2008
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If it's a new leak and not obvious anywhere else probably the draft tube.
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LongWeekends
Scottsdale, AZ
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Joined: 09/07/2011
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FWIW, our 5.9 developed a leak within two weeks after we bought it. The previous owner just had it serviced. The oil filter wasn't tight. Tightened it up and it is dry as a bone. Worth a shot to check.
Michael
Just me, my wife, our 11 year old daughter and our two big, hairy Goldens.
2004 Coachmen Cross Country
370DS - 300HP - 2 Slides
2007 Suburban(Not the best toad but hey, it works and has room for the dogs)
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