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05-21-2020, 04:51 PM
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#1
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Senior Member
National RV Owners Club Freightliner Owners Club
Join Date: Nov 2018
Location: Sun City West, AZ
Posts: 123
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Exhaust Smoking
Had a minor accident with a drunk guy and he hit the rear corner of the MH. this squashed the exhaust pipe flat and I was able to pry it open enough to be able to run and not get it towed, about 90%.
after getting it repaired, when idling and on full throttle it now throws out black smoke. Never did it before.
the tailpipe was replaced and a new beautiful chrome exhaust end now sticks out.
how could this have caused the exhaust to smoke?
I do not think there was any engine damage, but I may be wrong in my assumption.
any ideas?
thanks
Tom
04 tropical, 350hp cat c7
__________________
2004 National RV Tropi Cal 
2001 GMC Jimmy 4x4 toad/// oops, totaled by nice blond lady
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05-21-2020, 05:00 PM
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#2
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Senior Member
Join Date: May 2017
Location: Vancouver Wash
Posts: 7,227
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Probably just shook the soot loose.....
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05-21-2020, 05:13 PM
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#3
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Community Moderator
Monaco Owners Club
Join Date: Jul 2016
Location: Central, Arkansas
Posts: 11,292
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could it have jarred the air cleaner loose and kinked the intake hose?
__________________
2004 Beaver Monterey Laguna IV
Cummins ISC 350HP Allison 3000 6 speed
2020 Chevy Equinox Premier 2.0t 9 speed AWD
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05-21-2020, 05:36 PM
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#4
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Senior Member
Triple E Owners Club
Join Date: Jul 2013
Location: Nanoose Bay B C
Posts: 394
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Exhaust Smoking
Sounds like something is plugging your air intake.
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05-21-2020, 09:13 PM
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#5
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Senior Member
National RV Owners Club Freightliner Owners Club
Join Date: Nov 2018
Location: Sun City West, AZ
Posts: 123
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will tear the intake apart and look, hadn't thought of that and it was in that corner.
tom
__________________
2004 National RV Tropi Cal
2001 GMC Jimmy 4x4 toad/// oops, totaled by nice blond lady
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05-21-2020, 09:39 PM
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#6
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Senior Member
Triple E Owners Club
Join Date: Jul 2013
Location: Nanoose Bay B C
Posts: 394
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Keep us posted.
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05-21-2020, 09:52 PM
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#7
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Senior Member
Join Date: Jan 2005
Posts: 1,447
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The bent exhaust could cause high back pressure this can damage the turbocharger exhaust seal ring. What color smoke? and what does the smoke smell like? Blue or blue whitish smoke would indicate oil being burnt. The smell can be either a fuelish smelling or smell like burning oil. If it smells like oil I would say you need to get your turbocharger resealed. Safe Travels
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05-27-2020, 05:11 PM
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#8
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Senior Member
National RV Owners Club Freightliner Owners Club
Join Date: Nov 2018
Location: Sun City West, AZ
Posts: 123
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the smoke looks black, can't smell it.
took it to frightliner and they came back with all the cats smoke  and only thing they can find is two injectors are going bad and heiu pump tests almost bad.
you know about 7k worth.
that was a lot of help, don't want to be going down the street puking out black smoke.
tom
__________________
2004 National RV Tropi Cal
2001 GMC Jimmy 4x4 toad/// oops, totaled by nice blond lady
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05-27-2020, 05:35 PM
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#9
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Registered User
Join Date: Oct 2011
Posts: 2,183
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Thats a simple fix.
Could be much more complex.
If you let the pump and injectors fix go you will write a very big check.
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05-27-2020, 05:35 PM
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#10
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Senior Member
Join Date: Jan 2005
Posts: 1,447
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If the injector is stuck open-dumping diesel in it can smoke black but it usually knocks pretty loud.
It might be time to get a second opinion. Is there a Cat dealer close to you?
its your decision but I would get a opinion. And they hardly smoke at all. Too many emission standards to let that happen.
Good Luck and Safe travels.
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05-27-2020, 08:41 PM
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#11
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Senior Member
Join Date: Mar 2009
Posts: 1,718
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Could the Charge Air Cooler be leaking or one of the CACs connections?
Richard
__________________
95 Bounder 32H F53
460
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05-28-2020, 06:23 AM
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#12
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Senior Member
National RV Owners Club Freightliner Owners Club
Join Date: Nov 2018
Location: Sun City West, AZ
Posts: 123
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Quote:
Originally Posted by House Husband
Could the Charge Air Cooler be leaking or one of the CACs connections?
Richard
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how would I be able to check that?
tom
__________________
2004 National RV Tropi Cal
2001 GMC Jimmy 4x4 toad/// oops, totaled by nice blond lady
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05-29-2020, 06:06 PM
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#13
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Senior Member
Join Date: Mar 2009
Posts: 1,718
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Quote:
Originally Posted by F451degrees
how would I be able to check that?
tom
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You would have to visually inspect the components for cracks or loose connections.
Richard
__________________
95 Bounder 32H F53
460
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