Catalylic convertor gurus
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Shops, Barns, Varmints, and Trucks
Forum Description: anything you want to talk about except politics
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=155390
Printed Date: 19 Jul 2025 at 12:13pm
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Topic: Catalylic convertor gurus
Posted By: desertjoe
Subject: Catalylic convertor gurus
Date Posted: 06 Nov 2018 at 7:33pm
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Well,,on the little Nissan Frontier I picked up,,I noticed the MPG was not too swift and just kept gettin worse. It gettin bout 11 MPG now and thas a 4 cylinder with 5 speed and gentle drivin,,!!! Was drivin it to go vote and the check engine light come on so I went and voted then drove to O'Reillys and they tell me the Catalytic Convertor is pluggin up,,,,WTF,,?? The dang trk only gots 145,000 miles! So, I stop at Autozone and they tell me the same thing ,,,HMMMmmm?? new convertor is $170,!! holey CHIT,!! Anybody got any suggestions ,,seems like I read somewhere that you can drill into it and drain the catalyst and be good to go,,,,!! Failing that,,,any kind words of wisdom. Bye the way NM is not like californy and NO check stations,,,,
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Replies:
Posted By: jaybmiller
Date Posted: 06 Nov 2018 at 7:49pm
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aftermarket cats should be cheaper... also they make 'test pipes' that fit where the cat was..... ------------- 3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water |
Posted By: Les Royer
Date Posted: 06 Nov 2018 at 7:50pm
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I feel yer pain Joe. I'm a little upset my 4.9 in my brick nose 4x4 only gets 11-13. But I need to find a site where I can calculate my non stock tire size with those 31/10.50-15 tar's on there. Maybe I'm coverin more ground than the odometer says. That Nissan all stock or do you got it all jacked up where you can see Nebraska from the drivers seat? ------------- I still gots my A/C but it's clear out in the barn now. |
Posted By: blue924.9
Date Posted: 06 Nov 2018 at 9:44pm
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Cut exhaust pipe off right after cat. Drive somewhere you won't mind a mess. Take a big long rod and 4 pound hammer. Drive rod through exhaust pipe. Start vehicle and watch platinum pellets fly out the back. Use s clamp to reseal exhaust pipe ------------- hi my names dan, I am a young guy. i have a problem, i prefer my tractors orange and my clutches mechanical, thanks for letting me share |
Posted By: 1955CA
Date Posted: 06 Nov 2018 at 10:05pm
LOL  Yep, mine are gone and have cheater pipe in their place.
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blue924.9 wrote:Posted By: Ted J
Date Posted: 06 Nov 2018 at 11:45pm
Oh MY!!    The test pipe does the trick...BTDT.... ------------- "Allis-Express" 19?? WC / 1941 C / 1952 CA / 1956 WD45 / 1957 WD45 / 1958 D-17 |
Posted By: desertjoe
Date Posted: 07 Nov 2018 at 3:22am
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I checked out some YouTube videos and most people use two of the spark plug non-foulers and screw them into the collar where the sensor was on pipe and that "fools" the ECM when the catalyst is rodded out or cat replaced with one of those test pipes,,,,, I'm gonna pull the cat in the mornin cause it gots flanges on both ends,,,,,and then,,,,and then,,,,I'll make sure and wipe off any ,,,,"Incriminatin evidence",,,,er,,,just make sure it looks unmolested,,,,,,I'm outa here,,,,,
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Posted By: PaulB
Date Posted: 07 Nov 2018 at 3:31am
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That’s what you get when you have a vehicle controlled by a computer 👎 ------------- If it was fun to pull in LOW gear, I could have a John Deere. Real pullers don't have speed limits. If you can't make it GO... make it SHINY |
Posted By: jaybmiller
Date Posted: 07 Nov 2018 at 6:35am
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yeah ..computer...sigh.. 99 CRV blew out the front O2 sensor , so 'mechanic' replaced with after market one..too lazy to use old one....time passes ..engine light comes on... 'cat not rdy'..I dig into it..seems the computer 'gurus' set the trip points in the computer a tad 'fine' so you need the $$$$ O2 sensor. I tried another after market one( $20 delivered) and it was OK for awhile. Sad thing is there's NOTHING wrong with the cat( it's new), just the computer program. I timed it just right this year..got all lights off, computer happy, had E-test done( they just read computer..NOT gases coming out), so good for 2 more years. Jay ------------- 3 D-14s,A-C forklift, B-112 Kubota BX23S lil' TOOT( The Other Orange Tractor) Never burn your bridges, unless you can walk on water |
Posted By: Dakota Dave
Date Posted: 07 Nov 2018 at 7:08am
| Your computer will never be happy with a test pipe or a hollowed out cat. Put a can of sea foam in a half tank gas and drive it hard. You can remove the cat and fill it with very strong hot water and dawn soak and reinstall. But that's a lot of work. I hate exhaust work so tommorrow I'm taking my $250 Pontiac transport beater in and having a new exhaust installed. It'll cost as much as I paid for the car but it worth it. |
Posted By: weiner
Date Posted: 07 Nov 2018 at 8:15am
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That’s what you get when you have a vehicle controlled by a computer 👎 Dittos! ------------- Real heros wear dogtags, not capes. |
Posted By: desertjoe
Date Posted: 07 Nov 2018 at 8:28am
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Well,Dave,,,I was gonna take the cat off,,,either for clean out or rod out. I checked out several YouTube videos on cleaning em out with some of ole Shameless's favorite stuff,,,just plain old Vinegar,,,ugh,,,,,,,they show pics of before and after and looks like the vinegar does work. I'ma try that first but,,,,but,,,me bein a person of short patience,,,if cleanin with vinegar don't do the trick,,,,it be out with the crow bar,,,,,,,,,
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Posted By: john(MI)
Date Posted: 07 Nov 2018 at 9:31am
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The last one I did, I used a long 1/2" extension and rammed it in and dumped it out til it was empty. Unfortunately you can't buy the test pipes anymore, at least in MI you can't. If your handy, you can make one and weld it in place. The problem you run into now is they are attached to the manifold so if you want to replace it, you'll need a pipe with a flange on one end. ------------- D14, D17, 5020, 612H, CASE 446 |
Posted By: darrel in ND
Date Posted: 07 Nov 2018 at 10:57am
| I thought that I read once (maybe even on here) that the platinum in those catalytic converters is some valuable stuff. Is there anything to that. ..? Darrel |
Posted By: chaskaduo
Date Posted: 07 Nov 2018 at 11:06am
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Scrap prices listed for different sizes etc. Rockaway Recycling, NJ. https://catalyticcontrol.rockawayrecycling.com/catalytic-converter-scrap-prices/" rel="nofollow - https://catalyticcontrol.rockawayrecycling.com/catalytic-converter-scrap-prices/ Need to also check your state regs on doing it. ------------- 1938 B, 79 Dynamark 11/36 6spd, 95 Weed-Eater 16hp, 2010 Bolens 14hp |
Posted By: desertjoe
Date Posted: 07 Nov 2018 at 1:04pm
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Back when the price of junk iron and aluminum and all was all so high,,there was this group of locals that were scavanging the cats off parked cars and trucks. They carried generators with saws alls and was just cuttin em off the vehicles. Then when that dried up they were actually stealin em off operating cars. I got asked several times if I wanted to sell the cats of our two vehicles. You even seen em for sale in the want ad papers,,,,,,don't have any idea what the platinum was sellin for Tho,,,,
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Posted By: Dakota Dave
Date Posted: 07 Nov 2018 at 4:11pm
| the platinum is only valuable if its still in the converter. Its illegal for a recycling location to except your platinum if its out of the converter. |
Posted By: Les Royer
Date Posted: 07 Nov 2018 at 8:01pm
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I've only taken one cat in for scrap. Don't know what it was off of an it was pretty good size and they gave me 70 bucks for it ------------- I still gots my A/C but it's clear out in the barn now. |
Posted By: desertjoe
Date Posted: 07 Nov 2018 at 8:17pm
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Well,,I got under the Nissan trk this mornin and,,,,and,,,the friggin catalytic convertor has already been replaced with a piece of exhaust pipe,,,so,,WHAT THE HECK TRIGGERED THE CHECK ENGINE LIGHT?? I checked out some more YouTube videos and see where some people remove the second sensor and install TWO of the old timer "Spark Plug Non Foulers",,then reinstall the sensor in the top non-fouler after drilling it out where the sensor will fit inside the non fouler,,,Done it all like they said and fired thet mother up and ran it down the road plumb to the county line road and back just as fast as I wanted to,,,,and,,,and,,,believe you me,,that dang engine started to run smoother and smoother with more power the more I drove the piss out of it,,SO,,I done it again just for good measure,,,!! I am impressed with the difference in the engine now,,!! And the check engine light never offered to come back on,!! Ole Shameless is gonna be impressed now but he won't mind that the price on the trk just went up a bit,,,and him wantin it so bad,,,
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