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Old 09-27-2017, 03:42 PM   #1
Mini-Skoolie
 
Join Date: Apr 2017
Location: NY,NY
Posts: 16
Year: 1992
Coachwork: Thomas
Chassis: Saf-T-Liner ER
Engine: Cummins 8.3 Mechanical (6CT)
Rated Cap: 80
Question 3208 with a DPF

Hi All,

This is my first time posting...I'll be making an intro post once we actually own a bus .

I'm looking at a 1990 Thomas with a CAT 3208 that is up for grabs from my local school district. Seems like a solid bus, low mileage (125k), overall a good deal.

What worries me is that it has an aftermarket DPF that has been installed to make it CARB compliant. I'm not too familiar with diesel exhaust systems, but I'm wondering how hard it would be to just tear out the aftermarket DPF? Is it as simple as cutting it out, stripping out the extra computer, and plugging the holes?

Could I do it on my own if I'm relatively mechanically inclined?

Thanks for the input!

Mydogisgreat is offline   Reply With Quote
Old 09-27-2017, 04:30 PM   #2
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
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Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
stay away from it... aftermarket DPF's were the worst... they really had near zero protection against engine damage if the cycle went wrong... wayyy too many good busses out there for good prices that didnt have any of that on them...
-Christopher
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Old 09-27-2017, 05:39 PM   #3
Bus Crazy
 
Join Date: Feb 2015
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Engine: TE 444
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If it is like the one that was on my first bus, just replace it with a muffler, it is just a big filter that has to be cleaned manually when the alarm goes off, no regeneration cycle, engine is still mechanical and there is no penalty for removing aftermarket DPF's that the school district was paid by the feds tho install
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Old 09-27-2017, 06:27 PM   #4
Traveling
 
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Quote:
Originally Posted by Kubla View Post
If it is like the one that was on my first bus, just replace it with a muffler,
Straight-pipe that beast.

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Old 09-27-2017, 09:48 PM   #5
Mini-Skoolie
 
Join Date: Apr 2017
Location: NY,NY
Posts: 16
Year: 1992
Coachwork: Thomas
Chassis: Saf-T-Liner ER
Engine: Cummins 8.3 Mechanical (6CT)
Rated Cap: 80
Quote:
Originally Posted by cadillackid View Post
stay away from it... aftermarket DPF's were the worst... they really had near zero protection against engine damage if the cycle went wrong... wayyy too many good busses out there for good prices that didnt have any of that on them...
-Christopher
What kind of engine damage could be expected, is it something I could inspect for when I go take a look?



Quote:
Originally Posted by Kubla View Post
If it is like the one that was on my first bus, just replace it with a muffler, it is just a big filter that has to be cleaned manually when the alarm goes off, no regeneration cycle, engine is still mechanical and there is no penalty for removing aftermarket DPF's that the school district was paid by the feds tho install
The DPF on this thing seems like more than a filter, it has full region cycles that are done using an outside power source (plugging the thing into an outlet) Link here: Horizon DPF - ESW Groupģ

Quote:
Originally Posted by Rusty View Post
I like that sound...the CAT would purrrr though right?
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