I'm a newbie owner of a 1996 Trooper w/108k on the clock. The "check
engine" light is on and it's been scanned with "O2 sensors slow to
move" or something like that. They probably do need replacing but can I
do this myself with basic mechanical skills?
How easy are the O2 sensors to get to on a '96? Any pitfalls in a
backyard mechanic trying to do this himself? Is it a DIY type auto
project? Special tools?
Thx for any input!
get Liquid Wrench and pre-soak the O2 sensor on exhaust for a couple hours,
couple times before you apply a standard 21 or 23 cm wrench to turn counter
comes off really easy after that. place some newspaper under the area to soak
you can buy replacement Bosch sensor from Advanced Auto Parts or Napa for around
other than the wrench, no other tool is needed
Like Dodo said - soak them with liquid wrench first. They are nearly
impossible to get out otherwise. I don't know about that trooper, but most
vehicles have 2 or more O2 Sensors - one on each exhaust pipe before the
collector, or one after the collector, but before the catalytic converter
and one after the cat. Chances are if one is going the other(s) will go
soon, so I would go ahead and replace them all.
BTW, a 21 or 23 cm wrench is _way_ to big try, a 21 or 23 mm instead (I
know it was a typo, but I couldn't help myself) or even a large cresent
wrench, but that is more likely to slip off.
I have 4 sensors on 98 Trooper. Right front one is impossible to change
without removing prop shaft. Liquid wrench (or equivalent) is a must, or you
wont get them out.
General opinion on the net is not to use aftermarket Bosch sensors (people
say they fail pretty quickly), so I went for Borg-Wagner... and both
replacements failed after about 10K miles. So I got OEM (only slightly more
expensive than BWs), and these have been working just fine so far. I'm
keeping my fingers crossed ;)
o2 sensors are not as easy as you may think. You may possibly strip the
treads in you exaust manifold trying to remove it. Isuzu is famous for
rusting parts. When you remove it try to remember if you get it out to
use high heat anti sieze when you put the new one in.
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