Cummins Marine Diesel Repower Specialists › Forums › Cummins Marine Engines › Oil accumulation in air filter
- This topic has 13 replies, 5 voices, and was last updated 5 years ago by Dave Galehouse.
-
CreatorTopic
-
April 2, 2018 at 1:57 pm #30570
Hello,
I have two 6c8.3 Cummins engines in my boat (boat is a 2005). Boat was new to us last year. I started to notice some small amounts of oil accumulation in the air filters during the summer. I don’t have a ton of history on the boat maintenance wise, but the oil samples at survey came back good and the boat runs very well with no issues.
I came across this article which seems to describe issues with the B series engine, but I was trying to find out what I might be able to look at/diagnose?
Thank you
-
CreatorTopic
-
AuthorReplies
-
April 18, 2018 at 10:41 am #31215
Tony,
we purchased this boat last winter from a person in Connecticut who only owned it one season. We don’t have a ton of history on it maintenance wise, but my broker knows the previous owner before the CT owner and we were told he took good care of the boat and that money was never an issue. I am in the process of trying to track down some maintenance records. I have a Cummins certified mechanic going through it in the next few weeks and helping me getting it ready for spring.
I appreciate your help.
April 18, 2018 at 6:04 am #31201
Tony AthensModeratorVessel Name: Local Banks
Engines: QSB 6.7 550 HP
Location: Oxnard, CA
Country: USA
This is what I’d do:
Take off the Airsep and clean all 100% including the filter ( Go to an automotive speed shop and buy a K&N cleaning kit)…………….Remove the air side of the turbo and clean all that too using a paint brush and some good solvent –Blade, housing and air pipes….
Remove the Airsep drain line and check the 1-way valve at the bottom.. Be 100% sure that it works with just the “gravity of oil above” it as to it draining, and, does not allow air pressure to let air back up the valve–I don’t like the system, but it is what it is..
Put it all back together and WWM over the next 100 hours or so..
New aftercoolers? Tell me the history as to why?
Tony
April 17, 2018 at 2:28 pm #31182
donald rothParticipantVessel Name: Paumalu
Engines: Cummins 6BT 180 hp
Location: where the fish are!
Country: United States
Just a thought here
Have you read the articles on this site re oil level and dipstick calibration?
Many problems like the one you describe are no fault of the CCV, but are due to overfilling the crankcase.April 13, 2018 at 4:56 pm #31034
William WalterParticipantVessel Name: Positive rate
Engines: Cummings 480ce
Location: Long island
Country: Usa
Airsep
Dave will be interested in what Tony says also .i believe that no matter how much tilt you have there it will not get to that drain because to get to drain is internal to the airsep and the filter where it meets the airsep is external. That being said if it’s coming from the blow by side.That’s why I suggested a leak in the seam. You may also be picking up oil in engine room which would acumulate there if you have it tilted down.be interesting to see what the experts say.Bill
April 13, 2018 at 12:50 pm #31021Tony,
as requested here are some photos. In a brief discussion with our marina mechanic (he was a diesel mechanic in the Coast Guard but isn’t a “cummins mechanic”). He thinks, the very slight canted angle of the air filter and housing is not allowing oil vapor from the vapor/blow-by hose to funnel back down the sump hose. The housing is almost horizontal, but the air filter springs were a little loose and the air filter was angled down slightly and I think that’s why the little oil vapor that was in there was slowly pooling at the other end of the air filter over time.
But I would appreciate your input.
Thank you
Dave
April 5, 2018 at 5:25 pm #30689
Tony AthensModeratorVessel Name: Local Banks
Engines: QSB 6.7 550 HP
Location: Oxnard, CA
Country: USA
All is good!
Tony
April 5, 2018 at 10:14 am #30670Tony, I apologize for not having photos right now. The boat is wrapped up 60 miles away from me. I will try to get some in the next week or so.
April 4, 2018 at 4:51 pm #30647
Tony AthensModeratorVessel Name: Local Banks
Engines: QSB 6.7 550 HP
Location: Oxnard, CA
Country: USA
Walker AirSep issues??
Dave,
If you want real help, we need to SEE what you SEE.. Also, I need to see the complete installation of the AirSep showin all the plumbing to and from it..
Put in the effort and I’ll tell you the solution.
Tony
April 4, 2018 at 11:20 am #30645
William WalterParticipantVessel Name: Positive rate
Engines: Cummings 480ce
Location: Long island
Country: Usa
Blowback
Dave i would go to the walker site .they can explain it a lot better then I could.some oil in the airsep is normal but what happens is it drains back into the pan through a hose attached to the airsep which leads to a Ck valve.sometimes this check valve fails but I’ve heard that’s pretty rare.my leak was coming from a seam in the airsep that was leaking this oil.it would accumulate at bottom where rubber gasket hits airsep.picture is of the drain hose at bottom and the damage I had.
April 4, 2018 at 10:54 am #30644I don’t quite understand the scenario you described. Where is the oil originating from. Blowback? Mist in engine room?
April 3, 2018 at 2:24 pm #30618
William WalterParticipantVessel Name: Positive rate
Engines: Cummings 480ce
Location: Long island
Country: Usa
Air sep
Dave I have had trouble with oil leaking from the airsep also.my boat is a 2003 480 ce with walker air sep. If you call walker they were helpful to me in problem solving my issue. Seems the airsep developes a crack in a seam where the unit is joined and this will lead to a leak.I believe there is a repair kit for a fix.i was told the airsep had a finite life because of the baffling on my model..I did replace one because of the leak and prior damage.This may or may not be your problem but I would call them.Bill
April 3, 2018 at 10:57 am #30607I noticed it last summer by seeing a small spot of oil in the engine room on the floor. It was dripping from the bottom of the air filter where the metal cover meets the end of the filter held on by the three spring hooks. The only current photo I have of the air filter is attached, though not sure it helps.
April 2, 2018 at 5:13 pm #30591
Rob SchepisForum ModeratorVessel Name: Tenacious
Engines: 6BTA 5.9 330's - "Seaboard Style"
Location: Long Island, NY
Country: USA
Not too sure what you mean by “small amounts of oil accumulation in the air filters” ?
Have some pics of your setup including the CCV setup?
Are you running the oil at proper level? Have you read through this:
https://www.sbmar.com/articles/oil-pan-capacities-for-cummins-marine-engines/
-
AuthorReplies
You must be logged in to reply to this topic.