Remove Soot Trap? - Diesel Place : Chevrolet and GMC Diesel Truck Forums
Home Forum Market Place Garage Lounge (2) Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > 6.5L Diesel Engine
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Auto EscrowAuto LoansInsurance is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Closed Thread
LinkBack Thread Tools
Old 11-21-2008, 12:58 PM   #1 (permalink)
Diesel Technician
Dave001's Avatar
Join Date: May 2008
Location: NH
Posts: 280
iTrader Score: 0 reviews

Remove Soot Trap?

If I've done my homework correctly, my '97 doesn't have a cat, it has a soot trap that looks like a cat. Is this right? Before I realized this I was thinking of removing the cat to take some restriction out, but now I'm not sure. Does it make any sense to remove the soot trap?

I want to keep the noise down so I plan to keep the muffler, and I don't want to do anything else that might add resonance or increased noise.
'98 GMC K2500 Extended Cab Long Bed - Heath Max E Tork Towing PCM, turbo-master, 4.10 gears, 4L80, boost, EGT, fuel pressure on the A-pillar.

(Use this one at work) '98 K3500 Crew Cab Long bed Dually - Heath Max E Tork Towing PCM, turbo-master, 4.10 gears, 4L80.

(Sold) '97 GMC Suburban 2500 4WD 6.5 L65 "F" remote PMD - 202,000 miles
Heath Max-E-Tork GLE PCM, Heath Turbo-Master, Walbro FRB-5 fuel pump, vac pump delete
4L80/85E transmission 4.10 gears 265/75-16 Firestone Transforce A/T tires, 4" Diamond Eye exhaust
2-tank wvo conversion - Boost, wvo Fuel, and wvo filter vacuum gauges on A-pillar, EGT and fuel temp below dash
Sponsored Links
Old 11-21-2008, 12:59 PM   #2 (permalink)
Diesel Technician
DieselBeast65's Avatar
Join Date: Jan 2007
Location: Wauseon, Ohio
Posts: 379
iTrader Score: 0 reviews
Send a message via AIM to DieselBeast65

Buckeye Oil Burners Member

Northeastern Ohio Diesel Crew Member

yes, cut it off, then try to shine a light through it, very restrictive!!
-2007 Silverado Classic 2500HD LT3, LBZ, CCSB, Banks intake, 5" Magnaflow exhaust

-1996 GMC K2500, 6.5 Turbo Diesel, L65 HO VIN F, 4L80E, 14 Bolt Rear - 10.5" Ring Gear, 3.73, Factory Locker - G80 , dual thermostats, GEP Heads, ARP head studs, 4" straight pipe, 2.5" warpspeed crossover, Autometer Ultra-lite Boost Gauge, pyro, tranny temp, semi air horn, Recon Marker lights, high idle switches, HP4 and Turbo-Master, vacuum pump delete, Powermaster Gear-reduction Starter

-2006 Jetta TDI, 45mpg, not loud enough, stock for now

"The use of vegetable oils for engine fuels may seem insignificant today, but such oils may become in the course of time as important as petroleum and the coal tar products of the present time."-Rudolph Diesel, 1912
Old 11-21-2008, 01:01 PM   #3 (permalink)
Diesel Master
Join Date: Dec 2006
Posts: 1,114
iTrader Score: 0 reviews

Lone Star Diesels Member

get rid of it.
If you ask me it causes more harm than good
Old 11-21-2008, 01:04 PM   #4 (permalink)
Diesel Technician
1994ch's Avatar
Join Date: Oct 2008
Location: West Texas
Posts: 234
iTrader Score: 0 reviews

If I understand correctly the "CAT" is actually just a soot trap. I cut mine of and it now runs a lot better. The turbo sounds alot better to. Have not got a fuel milege check since I did it but I expect it to rise.
94 4X4 2500 chevy VIN F 190,000 mi.
PMD on bumper FINALLY
no cat, no snorkle
Member #10 of the Young and Poor club

"Elementary my dear Watson elementary!" Sherlock Holmes
Old 11-21-2008, 01:09 PM   #5 (permalink)
Green Machine
She Don't Smoke!
Green Machine's Avatar
Join Date: Aug 2007
Location: Ohio
Posts: 4,290
iTrader Score: 1 reviews

Northeastern Ohio Diesel Crew Member

All it really does get filled up, cause restriction, and cause higher egt's imo... the one on my truck was removed long time ago (before i bought it).

some people keep them on because they have to worry about emissions, or some people clean them out and weld a pipe through it for a visual inspection...
Dyno on April '09 - HorsePower: 228 , Torque: 376 YouTube Video
Quote: "Mind over Matter - I don't mind cause you don't matter!"

Old 11-21-2008, 01:56 PM   #6 (permalink)
Diesel Master
Join Date: Nov 2005
Location: San juan Capistrano, California
Posts: 1,673
iTrader Score: 0 reviews

It is a Catalytic converter as well as a "soot" trap oxidizer. The trapped soot particulate burns off when on the highway & under load.That is based on the proper operation of the OE factory designs. I suspect low speed operation,not getting out on the highway are the normal reasons for pluggage. Also I would think modified or malfunuctioning engine controls play a part in the overall disatisfaction of the TO/Cat. I have one flanged on each end for being able to reverse the exhaust flow. I expirmented with it for some time & could "un clog" the unit by reversing the flow. Here in Ca. we may have Bi annual smog inspection/testing at some point for vehicles under 8200 lb GVW. Numerous Imported light passenger & van vehicles are coming into the USA so not sure if the testing will be necessary on the older population of light duty vehicle by age. If any one has a good take off Ill be glad to take it & pay shipping . Better than throwing it away IMO.Please take a minute to let me know.Thanks
97 Cheyenne C 2500 6.5 TD 8600GVW/ 5 spd 3.73, G80. Cruise,Tilt, Rare Radio & Cassette option that plays simultaneously .Rhino Liner & 265 / 75 Michelin LTX/MS on PYO alloys. HEATH PMD & Turbo Master ,& Exhaust system. Coming up a low production y2k GMC 3500 ext cab,short bed pick up, " Denali Diesel "!!!

Last edited by 4doorTAHOE6.5TD; 11-21-2008 at 01:59 PM. Reason: more content
Old 11-21-2008, 01:57 PM   #7 (permalink)
Diesel Technician
phalfhide's Avatar
Join Date: Feb 2008
Posts: 433
iTrader Score: 0 reviews

Can I just cut it off and empty it and put it back?
I live in NC and thay have yearly inspections
1996 GMC Suburban C1500 6.5 Diesel "F"
3.42 Gears. Good highway Gears.
New 93000 miles. (Previous Owner)
Relocated PMD in front bumper #9 Risistor.
Heath Turbo Master !WOW! POWER
7/16/09 removed vac pump. Engine runs much Better.
6/12/12 Replaced Steel rims with OEM 2500 aluminum rims. Cant beleive how heavy the steel rims are.Very very little improvement in MPG.
11/4/12 Replaced Cytalytic Converter with Fake.(inspection in my State) BIg differance.

6/27/14 270,905 New injector pump from Heath diesel The one from the dealership is junk
270,905on Original Engine and still going strong.
Next owner is the junk yard!
Old 11-21-2008, 02:18 PM   #8 (permalink)
Diesel Technician
pgguru's Avatar
Join Date: Jun 2007
Posts: 421
iTrader Score: 0 reviews

Ontario Diesel Place Chapter Member

I would like to see a picture of one cut in half to see how full they get.
1995 GMC Suburban 1500HD SLT 2WD SLR 6.5 Turbo Diesel F L65 4" exhaust Heath Diesel Tow Chip Turbomaster and remote PMD

2003 Jetta TDi
2005 Passat TDi
2003 Ford Excursion 7.3
I don't change spark plugs
Old 11-21-2008, 03:21 PM   #9 (permalink)
Diesel Master
Join Date: Nov 2005
Location: San juan Capistrano, California
Posts: 1,673
iTrader Score: 0 reviews

In my observation,see prevous post, they don't get "full". The engine facing end just gets a splattered or a random pattern of pluggage. I was able to clean one up by driving cross country ,2K mi.,unladen but at 70 MPH. I actually dropped the front down at a muffler shop in the midwest for a look see. It was mostly cleaned up after the trip. I was the only driver ,ran70MPH on the cruise & the MPG varied by a few tenths per tank right from the start of trip. I now have a full 3 in. exhaust system - cat on the truck & have no reference road trip since to compare. But I would say on daily driving in urban area it is improved some over stock complete system.I would say local MPG is not as improved as the power improvement is.
97 Cheyenne C 2500 6.5 TD 8600GVW/ 5 spd 3.73, G80. Cruise,Tilt, Rare Radio & Cassette option that plays simultaneously .Rhino Liner & 265 / 75 Michelin LTX/MS on PYO alloys. HEATH PMD & Turbo Master ,& Exhaust system. Coming up a low production y2k GMC 3500 ext cab,short bed pick up, " Denali Diesel "!!!
Old 11-21-2008, 03:54 PM   #10 (permalink)
Diesel Technician
6.5silverado's Avatar
Join Date: Apr 2007
Location: Akron/Canton, Ohio
Posts: 383
iTrader Score: 0 reviews

i took mine out and went to town on it with a peice of pipe, a crowbar, and hammer. once everything was complately knocked out i put it back on that way when i get it e checked they will think i have one. its been checked twice since it was removed and passed with flying colors.
95 silverado 4x4 3/4 w/ 1 ton rear axle, 4:10 gears, straignt pipes (4 in), custom wastegate, "F" motor rebuilt by "Jasper", guages, cranked T bars, 265/75-16 Mud Countries, 16" Summit aluminum rims, Pro Comp es9000 shocks, '03 cab lights, "4x4 DIESEL" bed decals, rear locker, TSC diamond plate tool box, brake controller, 800 watts of pure loudness, manual TC lockup, high idle(coming soon), Giant "Yamaha" decal across back window

Competition riders of America XC racer
'04 YZ250F

Sponsored Links
Closed Thread

Thread Tools

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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
LML Sans Soot Trap moss6 Fifth Generation Duramax Electronics/Tuners 9 01-28-2011 12:57 PM
Soot Trap (l65) midnightrumbler 6.5L Diesel Engine 21 06-05-2010 10:46 AM
Cut out Soot Trap and now.... mrwilkerson 6.5L Diesel Engine 6 12-30-2008 04:55 PM
soot trap IamDave0887 6.5L Diesel Engine 9 11-05-2007 08:37 AM
Soot Trap Juancho 6.5L Diesel Engine 1 02-03-2005 01:21 PM

All times are GMT -4. The time now is 01:40 AM.

Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide

SEO by vBSEO 3.6.0