Turbo Oil

[Briankinley2004]

The inner port turbo on my 8V-71's has always had a very small amount of oil on the exterior of the outlet hose when I run her up on plane for a while. I can wipe it off and it will return when I run her on plane. I typically run 1000 RPM and put on plane every 4-6 hours for about 5-10 minutes. This last trip I ran her on plane for about 8 miles two days in a row. This was at 1950 RPM for about 30 minutes. I noticed this afternoon that since doing that all four turbos have this going on. I took the below picture. Any idea what could cause this? I wouldn't think all 4 turbos would go bad at once and the port outer turbo was just rebuilt a few months ago. I was wondering if it could be dirty intercoolers or somehow they are sucking oil through the airseps. I cleaned the check valves about 50 hours ago and they return to the crank case not a crap can. I have also heard of "wet stacking" from idling alot. Not sure if this is a sign.

 

[SKYCHENEY]

Inlet air side. Probably from the Air Seps

 

[madhatter1]

I get manifold leaks and random coolant sprinkles running slow. On plane and loaded nothing. Not saying to change your habits that work for you, just saying heat them up under a load more often. I have always said the best and cheapest way to maintain a Diesel is to burn fuel.

 

[Briankinley2004]

Inlet air side. Probably from the Air Seps

Is it a normal phenomenon or do I need to do anything other than what Mike said and run em some more. My 12V71s never did this but they had the foam filters instead of air seps

 

[Captain Ralph]

I would not call it a turbo oil leak, just an oily air leak.

If those are not the real orange DDC air hoses and/or those clamps are not tightened down guitar string tight, they will leak this oily air.

Saturated coalescer filters in the Walkers is where the oil is coming from.

Walkers are not service free.
The original design required the whole assembly to be replaced when the coalescer filters were saturated. The later designs have just replaceable cartridges.

As above, run the engines to clear the slobber from the air box.
Running the engines will not help clear the Walkers..

 

[SKYCHENEY]

I have never liked the Air Sep design. I installed the Racor CCV's instead. They did a better job.

 

[Briankinley2004]

I might need to replace those filters then. I just cleaned them about 50 hours ago. Maybe I don't need to spray the red oil on them after I clean them. Seems like they wind up oily anyhow

 

[Captain Ralph]

I might need to replace those filters then. I just cleaned them about 50 hours ago. Maybe I don't need to spray the red oil on them after I clean them. Seems like they wind up oily anyhow

I'm not talking about the air filters.
The coalescer filters are internal in the Walker cans.
The original design coalescer filters are not serviceable, The later models are.

Please consult the owners manual for service life of the model of Walker AirSep you are using.
Sadly, lots of folks do not know there is a service life of either model coalescer oil filters.

 

[Briankinley2004]

I'm not talking about the air filters.
The coalescer filters are internal in the Walker cans.
The original design coalescer filters are not serviceable, The later models are.

Please consult the owners manual for service life of the model of Walker AirSep you are using.
Sadly, lots of folks do not know there is a service life of either model coalescer oil filters.

Wasn't able to find any coalescer filters in mine and thought someone prior had removed them. Upon further investigation on the Walker site the type I have (with filter springs) don't have the coaleser filters (or they can't be replaced? Wasn't real clear). I was unable to find a service manual on their page, only videos of how to swap out the c filters and clean the air filters. The air filter I removed was definitely oil soaked and there was oil inside the housing. I guess I will clean them and the check valves while I am doing my winter maintenance. Seems like I did this about 50 hours ago.

 

[madhatter1]

Maybe post a pic of your setup. That would help. Saying because there are so many different setups.

 

[Sonic Boom]

Are the turbo oil drain lines vertical? Have seen this when the oil lines did not have enough "fall" to get the oil back to the pan. When on plane, the boat is at a higher running attitude and there is more oil to drain. Even saw one that would drain at all RPM's at the dock but not while on plane. Just a thought

 

[Captain Ralph]

Yep, you have the older air seps. The coalescer is internal and are not serviceable and whole assembly disposable when saturated.

I took a quick peek at their web site and sadly, it's just full of the new assembly information.
A direct call may help find more data on your setup.

 

[Briankinley2004]

I will try to post some pics. Pretty sure the turbo drains are straight down but I definitely will check that. I am looking into possibly going with the Racor system and will research that. Looking at Walker's site I would pretty much have to replace most of the system to go to the new style and that is 3K per engine if I am reading it properly. I ran my 12V71's without these things using the foam sock with a silencer. Never had any issues with oil leaks, etc.

 

[SKYCHENEY]

We kept the air sep filters and housings on a pair of 12v71's in a 60C and added the Racor CCV and then plumbed through the Racors to the inlet on the Air Sep. Seems to work fine and no oil in the Air seps as the Racor catches all of it first.

 

[Briankinley2004]

We kept the air sep filters and housings on a pair of 12v71's in a 60C and added the Racor CCV and then plumbed through the Racors to the inlet on the Air Sep. Seems to work fine and no oil in the Air seps as the Racor catches all of it first.

Did you use 1 racor per engine or two. I have read two is not necessary. Do you happen to have any pictures of the install? This is what I am thinking of doing.

 

[SKYCHENEY]

One per engine

 

[Dominion]

Sky Cheney, appreciate your knowledge on this, as I have same issue after rebuild and want to correct prior to putting 6V92TA's back in service on 41'. Can you please give photos or diagram, as I think I would like to switch to Racor and in reading it sounds like you may have done just that. My engines are single turbo. Question: Do I need to throw old 1989 Air-Sep stuff away, or can I use large air intake canister and add Racor filter with new style crank case pressure units? We appreciate your return effort on this, thanks!

 

[SKYCHENEY]

On my 6v92's I used regular K&N filters and drilled a hole in the end to accept the inlet hose from the Racor CCV. On the 12v71's we left the AirSep filters and housings in place on the turbos and ran from the outlet on the valve covers to the CCV and then on to the Air Sep.