Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Thread Tools Display Modes
Old 10-29-2021, 04:39 PM   #1
Join Date: Sep 2020
Posts: 24
8.2l Black smoke

Hey there everyone. So my engine overheated a while back with a leaky radiator hose. Fixed it up put water in and it drove back fine. No smoke for a hundred miles. Itís still running fine nonissue. Put a new alternator in it. Changed the oil and filters. Now itís blowing black smoke at acceleration and shifts. Took air filter off and ran it to see if it was air and not that. Whats next to look at. Like I said a couple months back it overheated up to 230. Fixed up cooled off and drove the last hundred mile leg just fine. Could that have done it. New to diesels. Thanks.

MedicineBus is offline   Reply With Quote
Old 10-29-2021, 04:54 PM   #2
Bus Crazy
s2mikon's Avatar
Join Date: Nov 2014
Location: NM USA KD6WJG
Posts: 1,336
Year: 1991
Coachwork: Bluebird
Chassis: All American RE 40 FEET
Engine: Cummins 8.3
Where are you now and what is the altitude?
Why can't I get Ivermectin for my horses?
s2mikon is offline   Reply With Quote
Old 10-29-2021, 05:58 PM   #3
Join Date: Sep 2020
Posts: 24
I’m in Silver City, Nm 88061. 4000 ft elevation. This is where the bus has been for over a year without smoke.
MedicineBus is offline   Reply With Quote
Old 10-30-2021, 07:29 AM   #4
Bus Nut
flattracker's Avatar
Join Date: Sep 2019
Location: Bly Oregon
Posts: 541
Year: 1986
Coachwork: Crown
Chassis: Supercoach
Engine: Cummins 350 big cam
Rated Cap: 86 passengers?
To me black smoke means excessive fuel flow to the engine. (diesels) If you don't lose coolant and you don't have water in your oil (tan colored oil) and you don't have oil in your coolant then you probably didn't hurt your engine from the one overheating. I hope you replaced the water with antifreeze so you don't freeze up your engine in the cold. It would ruin your engine in a hard freeze.
Experiencing 230 degrees shouldn't have done any real damage to your engine. Keep in mind you need to get the air out of the water jacket in some diesels when you lose the coolant. I know this is the case for Detroit 671s and Cummins big cam engines.
flattracker is offline   Reply With Quote
Old 10-30-2021, 09:18 AM   #5
Bus Geek
Join Date: May 2014
Location: West Ohio
Posts: 3,769
Year: 1984
Coachwork: Bluebird
Chassis: International 1753
Engine: 6.9 International
Rated Cap: 65
Black smoke all the time, or only when full throttle?

Free flowing exhaust?

I agree with the others. Black smoke is a sign of too much fuel or not enough air. Plugged air filters, collapsing air tubes, mud dobbers in the intake, plugged mufflers will all cause this.

If it's black smoke all the time, even at idle, you might have an injector problem.
My build: The Silver Bullet
Booyah45828 is offline   Reply With Quote
Old 10-30-2021, 10:24 AM   #6
Join Date: Sep 2020
Posts: 24
Water Jacket? Never heard of that one yet. Yes I added coolant when we got home. No coolant in oil and vice versa. Running fine. I’ll check for mud dobbers and collapsing tubes. Plugged mufflers? There is only puffs of black smoke during acceleration and gear changes. Thanks again for you guys help.
MedicineBus is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 12:00 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.