How smokey or otherwise is your diesel? - PeachParts Mercedes-Benz Forum

ah-kay · #1 01-21-2013, 02:01 PM

Quote:

Originally Posted by kerry

Just had my daughter's 84 SD emission tested. 8% opacity at 60mph, 10% at 50mph, 6% at 40mph.

What does this mean? Car is moving or stationary on a dyno?

I suspect my car has low compression I think. Little blow by and oil cap does not dance. It is not black smoke but a slight white haze. It is not a smoke machine so to speak. I just want to get some opinions on what is considered normal or acceptable. All my working ( some are not ) diesels smoke, just a matter of how much.

w123fanman · #2 01-21-2013, 02:16 PM

Car had been sitting for over a year, with 311K miles on it: 190D exhaust - YouTube
Not bad I would assume. Needs all new fluids and filters, might have close to no smoke then

ROLLGUY · #3 01-22-2013, 01:17 AM

Quote:

Originally Posted by ah-kay

All my working ( some are not ) diesels smoke, just a matter of how much.

I have noticed that all mine and my brothers cars smoke a little as well. The use of veg oil will cause a little more smoke than with pump Diesel.

NC-Diesel · #4 01-22-2013, 01:34 AM

78 smokes a bit at over 200k
82 I had sit for 6 months started and no smoke at all. And somehow magicly had much reduced blow by! Guess a ring freed or something.
81 smoke son start but I know it has marginal injectors COmpression is good. Need to get the injectors rebuilt.

ah-kay · #5 01-22-2013, 11:22 AM

Quote:

Originally Posted by ROLLGUY

I have noticed that all mine and my brothers cars smoke a little as well. The use of veg oil will cause a little more smoke than with pump Diesel.

Hi Rich, I do not think Veggie or D#2 make a difference. I think the engine are all tired with many many K miles.

ROLLGUY · #6 01-22-2013, 04:34 PM

Quote:

Originally Posted by ah-kay

Hi Rich, I do not think Veggie or D#2 make a difference. I think the engine are all tired with many many K miles.

I have noticed a slight color blue smoke when running veg, but no smoke when running D2. That just may be my vehicles because of the blend I run.