45XX Smoke in Salon during Cruise-gctid380555

[Guest]

My 1991 4588 develops a haze of oil smoke from the engine blowby in cruise. When we removed the sittee for installation of new carpet I found that the salon floor does not go all the way to the hull but floats on the structure with gaps of 1" to 6" inches in places along the side walls. On the port side I was able to use some insulation and aluminum tape to seal the gaps. The starboard side is a different problem since the cabinet is built all along that wall. When we changed the freezer I saw that there is a big gap and all of the lines, hoses, and wires are just loosely strung from the cabin into the engine compartment.

The engine side vents on the hull don't seem to have much purpose and the blowers are stuffed up into the aft end of the vents without any obvious way of even getting to them to install new ones. The big black vertical vents on the side of the upper cabin just end with a 3" vent hose hanging down into the open spaces behind the cabinets on the port and starboard sides. I have a 4788 parked next to me that doesn' t even have the cabin side vents so I really don't know if there is any reason to even have them on the 4588.

Has anyone "improved" their engine compartment venting system? I am considering the new environmental turbocharger adapters that put a suction on the engine crankcase vent so it pulls the blowby gases back into the intake system. Those kits are about $750 each without installation.

[boatworkfl]

I have talked to 2 boaters that had those kits on their Cummins, they removed them.

If you have that much smoke in the engine room run your blowers, and/or find out what is causing it. That much smoke in the engine room is not normal and you will get a lot of carbon deposits inside the engine room; if it is comming from the exhaust another story, mabe an injector issue.

[ksanders]

Seems like allot of smoke but I'm not familiar with Hino engines.

isn't this an issue that would be solved with Walker Airseps?

[boatworkfl]

ksanders wrote:
Seems like allot of smoke but I'm not familiar with Hino engines.

isn't this an issue that would be solved with Walker Airseps?

Walker airsteps are the ones the 2 boats I know of that removed them, both on D dock Seward.

Could also be a turbocharger issue.

[Guest]

The Walkers were my choice and they are available from Fisheries or the manufacturer. It isn't exhaust smoke because I put on new stainless risers and checked the system. The crankcase breather hoses are the source. The problem is probably because the boat only has 1100 hours and it is 21 years old. Sitting around and not being run at least every month is the worst thing anyone can do to a motor. They crank at the touch of a key and purr like kittens so I don't contemplate any internal work.

[boatworkfl]

Randyzon wrote:
The Walkers were my choice and they are available from Fisheries or the manufacturer. It isn't exhaust smoke because I put on new stainless risers and checked the system. The crankcase breather hoses are the source. The problem is probably because the boat only has 1100 hours and it is 21 years old. Sitting around and not being run at least every month is the worst thing anyone can do to a motor. They crank at the touch of a key and purr like kittens so I don't contemplate any internal work.

You comment rings a bell as to the reason they were removed, but, one of the 2 boats had new engines.

[mmichellich]

There should be a hose from the breather to the engine air intake to suck the blowby back thru the engine. Should be piped right to the air cleaner side. This can create a mess at the air filter so many folks have built a slobber catcher out of PVC and stainless scrubbing rags to catch the oil. Is your tube blocked? Check old posts on slobber.

[Guest]

This Hino 250 model just has a hose coming out of the valve cover area and goes straight down the side of the motor next to the oil pan and just has an open end.

[mmichellich]

Randyzon wrote:
This Hino 250 model just has a hose coming out of the valve cover area and goes straight down the side of the motor next to the oil pan and just has an open end.

You might consider rerouting it back to lay along side the air cleaner (foam if original) middle, so when engine running it sucks in the output of the breather. Many folks have made slobber catchers to got in middle of the line to collect the oil so the air filter does not get plugged. Here is a photo. Put some of those cooking pot cleaner stainless scrubbers in the bottom. The metal surfaces will collect the oil and let it drain to the bottom.

http://im1.shutterfly.com/media/47b7dc25b3127ccec01d9f84a4d100000010O08AcN2rNq4btQe3nwQ/cC/f%3D0/ps%3D50/r%3D0/rx%3D550/ry%3D400/

There are numerous posts on excessive blowby and what to do about it. Here is just one.

http://im1.shutterfly.com/media/47b7dc25b3127ccec01d9f84a4d100000010O08AcN2rNq4btQe3nwQ/cC/f%3D0/ps%3D50/r%3D0/rx%3D550/ry%3D400/

[The_Other_Gary]

I ditched my Walker Air seps in favor of the Racor closed crankcase ventilation system.

My blowby now goes into a Racor CCV 4500 filter cannister and then to a Racor Air filter.

The CCV 4500 collcts the oil in the blowby and either sends it back tothe crankcase or to a puke bottle.

I used to get some sooting of the transom and now I get none at all.

My engine room is clean and there is no diesel smell at all.

Very happy I made the upgrade.



the air filter is much quieter than the walker air sep, you can see the hose barb that goes to the CCV 4500 just before the turbo connection.

[smitty477]

"This Hino 250 model just has a hose coming out of the valve cover area and goes straight down the side of the motor next to the oil pan and just has an open end."

That is not normal but.... add an old 1-2 gallon empty and cleaned bottle at the base old the engine as a 'test'. Cut off a small section of the top of the bottle and direct this hose to near bottom of the bottle and filll the bottle with cheap 'scrubbies' from a dept store. See if this reduces the smoking to a much lesser degree as a simple quick test. If it does you can make a much more elaborate 'puke can' with the output side leading to the intake filter area as well.

FWIW these engines do not normally put out that much 'mist' at all - our puke can capture less than a few tablespoons of mist over 500+ miles at fast criuse. Are you quite sure of the source?

Hope this helps

[mmichellich]

I had a lot of smoke coming into the cabin of our 47 once and it was a small burned hole in the top of the exhaust hose about a foot from the riser. No water, just smoke. Had to install new risers.