Astro 1985-2005
Chevy's first entry into the minivan class, offered in All Wheel Drive to add to its versatility.
Platform: M-Body

service engine soon code P4020

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Old June 3rd, 2009, 5:07 PM
  #11  
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still my question is where can I find a cat online for a reasonable price?
Old June 14th, 2009, 8:35 PM
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Default Universal Cat Converters

Originally Posted by roc0999
they're a little on the expensive side , 346.00, I seen them for 285.00 w/free shipping thanks for the input though
What's wrong with using a Universal Catalytic Converter?
I just replaced mine with Universal; costs around $100 with all the camps?
Attached Thumbnails service engine soon code P4020-astrovan-2000-catalytic-converter-installation-002.jpg  
Old June 16th, 2009, 7:32 PM
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so you just cut yours out and that one slips right over the existing pipes and then clamps?
Old June 17th, 2009, 10:08 AM
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Default Installing Universal CatConv

Originally Posted by roc0999
so you just cut yours out and that one slips right over the existing pipes and then clamps?
I just did this on my 2000 Astro. I dont know how different it is from your model year.
I found a Maremont Cat Conv part number 38765. I think it has a 5 year warranty.
I used a reciprical saw to cut out the old one just where it begins and ends; about 1/2 inch from the weld on each side. Becaus it actually flares larger around the weld.
The you can slip on the new one and then clamp it down.
The diameter of the openings on the new Universal CatConv is 3 inch but the my exhaust is 2 3/4.
I had to make up for the 1/4 inch of space. You may think that it's no big deal, it's up to you. So I found reducing couplings; Maremont 548588 (2 3/4 ID and 3'' OD). That took out the 1/4 inch gap. Then two 3inch and two 2-3/4inch clamps.
Now, you may just not need all that coupling and be able to clamp it down. Maybe just by tightening the clamps you can get it tight enough. I chose to look for size reducing couplers because I thought I get a better fit.
Took the old one to a salvage yard, and got $20 for it!
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Attached Thumbnails service engine soon code P4020-astrovan-2000-catalytic-converter-installation-001.jpg   service engine soon code P4020-astrovan-2000-catalytic-converter-installation-002.jpg   service engine soon code P4020-astrovan-2000-catalytic-converter-installation-003.jpg  
Old July 12th, 2009, 1:20 PM
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okay I just replaced the cat and wiped out all my codes, I had p0420 and p0446 and both were elated to the cat being clogged. I only paid 67.00 for it and 100 for it installed, not to bad, by the way they wanted over 400 at my local muffler shop for the cat installed from them
Old July 12th, 2009, 7:21 PM
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Very nice! Glad to hear you got it repaired for a good price.
Old July 13th, 2009, 8:43 PM
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thank you , I guess it just took a little research to find the good deals
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