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N56629
Dodge Dakota
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10/12/2006
06:48:21
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 Subject: RE: Cat. Conv. Purchase
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Wrapping is a problem with mild steel headers but may not be so with stainless steel headers. If you live in a damp area of the country then mild steel headers may rust out in as little as one year. If you live in the southwest then they may last the life of the vehicle.
I don't know of anyone that has first hand experience with wrapping stainless headers. Most of what you hear on the internet, in regards to wrapping headers, is based on old info.
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CluCool
Dodge Dakota
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10/17/2006
20:41:50
| RE: Cat. Conv. Purchase
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Ok call me dumb if you want but we have to learn somehow right? Well first off I'm sending my headers out to Jet Hot Thursday for the Blue coating. It will take 7-10 business days once they receive them. So I have been thinking. If I am getting new pipeing and cat from my headers back is there not a sensor in that pipeing somewhere I should replace?
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Mike Stager
Dodge Dakota
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10/17/2006
23:19:24
| RE: Cat. Conv. Purchase
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The O2 sensor? If it's never been replaced, then replacing it certainly isn't going to hurt. As they get older, they get slower at reading the exhaust, so as long as you are in there tinkering, I'd replace it/them. I'll be doing the sensors when I replace my Cat in the near future.
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GB2000
GenIII
10/18/2006
02:44:10
| RE: Cat. Conv. Purchase
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How many miles are on the truck? Personally I'd just leave your O2 sensors til they go out...you'll know when they go since your gas mileage will take a sh*t. If it's got over 60,000 miles and you don't mind buying a new one, you can do it and just consider it preventative maintenance. Definitely wouldn't hurt, just isn't crucial either.
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J and J Auto
GenII
10/18/2006
03:41:01
| RE: Cat. Conv. Purchase
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The o2 sensor is the most important of them all
they can get lazy and go bad but not effect gas
mileage all the time
they can go either way
rich poor mileage is a resault
lean this way is not very noticeable gas mileage
stays about the same but poor performance ping
can occure
on a stock truck the computer tables are so close
that the truck will still run fine but still be
bad on a modded motor a lot more noticeable
you can unplug the o2 sensor and the truck will
trip the 52 code but still run fairly well
now try that on a motor that is modded a lot and
it will run very bad because its flow is farther
away from the stock tables
stay away from the bosch chrysler uses the NGK
NTK sensors and they list for $108 but you can
get them from ngk.com for less than half the price
exact same sensor
The dealer cost on the 23023 sensor is $62 you
pay $108 for the box that says moparyour cost
direct is $44 this is what is used on most of
the dodge trucks 1 and 2 sensor systems
now the 05 hemi has 4 and they are only $20 each
weird hey already had to replace 1 on a hemi
truck with under 10,000 miles on it
go to ngk.com and replace the dam thing and not
even give a second thought to weather its bad or
not most start to get lazy around 60 to 80,000
and that is also the recomend replacement period
a scanner watching the sensor will apear like its
working fine hook an ociliscope up to it and
you can see the wave pattern is way off from
what it should be
this is how I finally after pulling my hair out
trying to figure out why these trucks were running
lean poor performance and just running crapy it
was the bosch o2 sensors failing at as low as
10,000 miles not reading the increased flow from
the mods
if you do these mods and notice no improvment its
probably the o2 especialy throttle body port
work and the 1.7 rockers these mods should be
noticed as soon as they are bolted on and improve
a lot from there within the first 200 miles
Larry
J&J Auto
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CluCool
Dodge Dakota
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10/19/2006
19:12:50
| RE: Cat. Conv. Purchase
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Whid part # do i need? Is it #23023 sensor or #23099 sensor for a 1999 3.9l on the ngk.com website? When I look for it by year/make/model/engine I get the #23099 is Rear and #23151 is Front. So I am totaly confused. Is there a front and rear that I need or do I just need Rear?
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CluCool
Dodge Dakota
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11/04/2006
15:51:34
|  RE: Cat. Conv. Purchase
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Ok the day has finnaly come.
This is how it went down....For the past two years or so ive been hearing a noise of like a lifter or rod ticking. I never investigated it because the noise would stop after it warmed up enogh?
What it has turned out to be was a bolt on each one of my manifolds was broken. So they had to take the front tires off and the hard plastic type stuff that is under each front fender off to get at the bolts.
Once he got the headers on he bent and welded up some 2 1/2" pipe. They pipes come to a Y and go to the muffler. He said he had to get some new nuts for the (2) 02 sensors, they were $15 each.
It does sound good though. I would say it sounds like a "Healthy" V6. It is not really loud like a Hemi or Cummins 27,000" dia exhaust. It does not sound like a Friggin' ricer either! It just sounds nice. On a scale 1-10 it is like a 5 For Loudness.
Check at some pics if you want http://www.cardomain.com/ride/2143892
Oh yeah he charged me $355 for the intallation and pipeing and O2 nuts. Is this a lot do you think or is it a fair price to pay due to what was involved?
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Eddie
Dodge Dakota
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11/04/2006
19:29:08
| RE: Cat. Conv. Purchase
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The broken bolts could be taken out without taking the fenders out. What yr is yours, I just took 4 bolts out of my brothers 93 3.9 auto with out removing anything but the manifolds. Whats up with the o2, mine only has one and so does my brothers truck.
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GB2000
GenIII
11/04/2006
19:34:41
| RE: Cat. Conv. Purchase
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The newer Dakotas have 2+ O2 sensors...mine has an O2 sensor before the cat and one after (they check to make sure the cat is doing it's job). Even newer Dakotas I think may have more than that...they have multiple cats/pre-cats and stuff.
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Mike Stager
Dodge Dakota
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11/06/2006
21:41:52
| RE: Cat. Conv. Purchase
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Taking the bolts out of the heads without the inner fenderwell off I can see, but if there was a broken stud, then that's the only way you'll get access with a drill properly ( I just performed this very task ).
And for those wondering, don't straight pipe your Dakota's cat unless you really want the cab noise.
I'll have to make a vid of the interior of my truck before I put the new cat on...it's way too noisy.
http://www.youtube.com/watch?v=Mbpuohniy7E
That's what it sounds like on the outside.
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