Exhaust smell!

[steve5B]

I was wondering if I might have a engine problem here shortly.  I noticed today when I started the engine up, the smell of the

exhaust would make your eyes burn and the smell was sickening. I haven't noticed this before, it's a 8v-92 natural (yes they

made several of these, and I have one in my bus!)  I pulled an oil sample ran it through my spectrometer and everything looked

fine. No fuel dilution. Would there be anything out of adjustment?


Steve 5B........Thanks!

[makemineatwostroke]

Steve, the engine probably has fuel and oil build up in the air box it needs to be driven to clear  the excess out.check the air box drains and make sure they are open with no water and antifreeze coming out of them.Your 8v92NA was a  popular engine swap in the mid to late 80s 

[steve5B]

Makemineatwostroke,

  Thanks for that info, where are the drains located?


Steve 5B.........Thanks!

[makemineatwostroke]

Steve some call the drains slobber tubes they are on the rear of the engine on each side 1/4 in tubing and should have a check valve on each one

[tekebird]

Sounds like unburnt fuel, this can happen from excessive idleing

[gumpy]

Could just be that it's colder than it has been, too. It is that time of year.

[TomC]

If it is cold, the white smoke can be rather strong smelling.  If it clears up once it is warmed up, no worries. Good Luck, TomC

[RJ]

Steve -

Your profile doesn't indicate what part of the busnut world you live in, but it's pretty cold across a lot of the US right now, and that's a factor.  (If you add your city/state to your profile, it helps.)

Make Mine made a good comment that appeared to be overlooked - get out and DRIVE your coach.  Drive it 50 miles or more, but drive it.  Any combination of city or highway, just do it.

Most diesels cool when idling, and your two- stroke 92 is no exception.  You must get it out and run it under load to bring the temp up to the 180 range, where it will start burning off all the crud that develops when you let it idle too long.

FWIW & HTH. . .

[Hartley]

Fuel...


The new ULSD has a distinctive nasty smell to it. If you were used to the old
fuel smell which to me smelled "sweet" then you have to get used to the noxious smell of the new fuel. It stinks like you filtered it through old gym socks and has an acid/acrid odor to it.

Just my 2-cents worth...

Dave....

[GM0406]

Steve,  It might be wise to check the outside temperature and humidity when you are experiencing this.  A comparison could be in a house with a gas drier on a cold humid day.  The thing stinks period.  Also how is the exhaust piped?  Of particular attention would be the rpm of the engine when you first start it.  I have to put a shim in throttle stop to keep my engine about 800 rpm on a start.  This helps keep oil presssure up and bring in enough air to get a good start and better burn.  If you have some kind of a fast idle device, maybe it broke?  Bill T.

[steve5B]

 
  Gumpy,


Thanks for the response, maybe it is more noticeable in colder weather.  I'll take note!


  Happy Holidays:


Steve 5B.......

[steve5B]

   Tom C,


Hope that's the case, I'll keep a close eye on it!

  Happy Holidays


Steve 5B......

[steve5B]

  Hi Russ,

  Have tried several times to post my location (Indianapolis, Indiana ) what type of bus and so forth) but for some how I can't

  get it to work. When I first joined, I had to have Nick post a picture of my bus.  Anyway thanks for your impute!

  Happy Holidays,


  Steve 5B.

[steve5B]

  Gmo406,


  I have noticed when the Humidity was high the smell was what you described.  Also I'll try raising the RPM  maybe that's the ticket!

Happy Holidays,

  Steve 5B.

[steve5B]

  Dr.Dave-Reloaded


Hey you may have hit the nail on the head, Never thought on the ULSD.  I might fill some filters with some off road and see if that's the problem!


Happy Holidays,

Steve 5 B.......