Cat converter heat shield question...
09-29-2005, 08:44 PM
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Cat converter heat shield question...
I just installed my carsound cat converter and I was wondering if I installed it correctly. Is the heat shield supposed to be on the bottom side of the cat after it is installed, or vice versa? I installed it with the heat shield on the bottom side just like the old OEM that was removed.
Also, using a direct fit cat, I noticed that the outer edges of the flanges started to bend inwards with a bulge in the middle due to the thickness of the gaskets between the cat flange and the muffler and exhaust flanges. I hope I explained that clearly. I'll try to get some pics for more clarity.
Any suggestions?
Troy
Also, using a direct fit cat, I noticed that the outer edges of the flanges started to bend inwards with a bulge in the middle due to the thickness of the gaskets between the cat flange and the muffler and exhaust flanges. I hope I explained that clearly. I'll try to get some pics for more clarity.
Any suggestions?
Troy
09-30-2005, 07:36 PM
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Heatshield down.
09-30-2005, 11:58 PM
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Hey Troy,
How was your stock cat after you removed it? Are you plumbing in a complete 2 1/4" exhaust system hence the new cat? Or just putting in a new cat?
How was your stock cat after you removed it? Are you plumbing in a complete 2 1/4" exhaust system hence the new cat? Or just putting in a new cat?
10-01-2005, 06:32 AM
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Originally Posted by CoedNaked
Hey Troy,
How was your stock cat after you removed it? Are you plumbing in a complete 2 1/4" exhaust system hence the new cat? Or just putting in a new cat?
How was your stock cat after you removed it? Are you plumbing in a complete 2 1/4" exhaust system hence the new cat? Or just putting in a new cat?
I'm not sure what the condition of the stock cat was like, because I didn't cut it open. There didn't appear to be any clogging while looking at it from both open ends of the stock cat.
No new pipes, just another cat.
Troy
10-01-2005, 06:35 AM
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Originally Posted by habanero
Heatshield down.
Is the heatshield supposed to protect the undercarriage or reduce the risk of causing fires below the truck? I'm confused...
Troy
Last edited by YotaJunky; 10-01-2005 at 06:37 AM.
10-01-2005, 07:02 AM
#6
The heatshield is to dissipate heat from heating up the underbody of the rig. Putting it on the bottom would be pointless as the heat will be dissipated to the open air. The heatshield should be on top of the cat when installed.
Mine was installed professionally, so I think they'd know.
Mine was installed professionally, so I think they'd know.
Last edited by rworegon; 08-03-2014 at 11:15 AM.
10-01-2005, 08:22 AM
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Originally Posted by waskillywabbit
The heatshield is to dissipate heat from heating up the underbody of the rig. Putting it on the bottom would be pointless as the heat will be dissipated to the open air. The heatshield should be on top of the cat when installed.
Mine was installed professionally, so I think they'd know.
Mine was installed professionally, so I think they'd know.
Well, that settles it then. I'll leave it with the heatshield up.
Troy
Last edited by YotaJunky; 10-02-2005 at 06:27 AM.
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10-01-2005, 01:17 PM
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Originally Posted by waskillywabbit
Mine was installed professionally, so I think they'd know.
when i was a tire guy, i had the ASE certified mechanic ask me how to change drum brakes!!!
10-01-2005, 01:48 PM
#10
Like I said, mine was installed PROFESSIONALLY by an individual I know is a professional at muffler installs. Why the heck would I take it to an idiot?
The heat shield is just that a heat shield...for the body, not the ground!
The heat shield is just that a heat shield...for the body, not the ground!
10-01-2005, 02:38 PM
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what i was saying more often then not that the people everyone thinks is a professional is an idiot.....
the ase mechanic i worked with was a professional mechanic and made 2x what i made, but he didn't know how to change drum brakes....
the ase mechanic i worked with was a professional mechanic and made 2x what i made, but he didn't know how to change drum brakes....
10-01-2005, 02:44 PM
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Originally Posted by Grounded
Troy,
Seeing as how you're in the "zone" for replacing catalytic converters right now, here's an article on Mazda converters for Judy's car
There's also a 24/7 Live Help Assistance icon at the top of the page.
http://www.car-stuff.com/mazdacatalyticconverter.htm
Pat
Seeing as how you're in the "zone" for replacing catalytic converters right now, here's an article on Mazda converters for Judy's car
There's also a 24/7 Live Help Assistance icon at the top of the page.
http://www.car-stuff.com/mazdacatalyticconverter.htm
Pat
Thanks Pat. Maybe I can get her to do her own cat converter!!
Troy
10-01-2005, 02:45 PM
#13
Originally Posted by jimabena74
what i was saying more often then not that the people everyone thinks is a professional is an idiot.....
the ase mechanic i worked with was a professional mechanic and made 2x what i made, but he didn't know how to change drum brakes....
the ase mechanic i worked with was a professional mechanic and made 2x what i made, but he didn't know how to change drum brakes....
10-01-2005, 03:22 PM
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(yanking hard on foot in mouth) I was always told down-the fire thing. I do see the point of it being up. Will keep in mind next time I need new exhaust though so far all my systems have been 360.
10-02-2005, 06:26 AM
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Originally Posted by sandcrawler
isn't it heat shield _down_ on the stock setup?
Troy
10-02-2005, 05:49 PM
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Originally Posted by Grounded
Both reasons sound really convincing! 
I'm ready for a little myself. Carsound has a 1-800 number if you want to have peace of mind Troy.
http://www.car-sound.com/04converter.asp
I'm ready for a little
myself. Carsound has a 1-800 number if you want to have peace of mind Troy. http://www.car-sound.com/04converter.asp
I emailed them last week and haven't heard from them yet. Thanks for the suggestion Pat.
Troy
10-02-2005, 06:21 PM
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The heat shield on the coverter goes down. This is because the thing gets to 1800*F and will light things under the truck (like tall grass) on fire! You will notice there is a heat shield above the cat under the floor of the rig. THAT protects the floor.
Score one for Professional idiots....
Score one for Professional idiots....
10-02-2005, 06:55 PM
#20
Okay...I'm no expert on the subject but I just went outside and crawled under my rig and looked at the FSM for my 85.
I noticed several things.
The FSM shows a heat shield above the cat...no heat shield below or on the cat. There is nothing above my cat attached to the floor to protect it, thus I assume that is why it is up like it is. If grass is high enough to hit my cat it is going to be rubbing all that good hot stuff, header, exhaust, muffler etc...at least on my rig.
Don't know the "factual" way that the cat converter god's specify that it be done...but I see the need to protect the floor before protecting the grass.
I think my professional idiot got it right...but perhaps a heat shield in BOTH places is the answer?
I noticed several things.
The FSM shows a heat shield above the cat...no heat shield below or on the cat. There is nothing above my cat attached to the floor to protect it, thus I assume that is why it is up like it is. If grass is high enough to hit my cat it is going to be rubbing all that good hot stuff, header, exhaust, muffler etc...at least on my rig.
Don't know the "factual" way that the cat converter god's specify that it be done...but I see the need to protect the floor before protecting the grass.
I think my professional idiot got it right...but perhaps a heat shield in BOTH places is the answer?
