Quote:
Originally Posted by melcoats
Bolt off, Bolt on? How the heck do you reach the plugs? I'm not beefy by any means, but I can't get my hands in there to disconnect B1 upstream or B2 downstream sensors. It's driving me crazy. Anyone have vids or tips on reaching these puppies?
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On my V8 i got both upstreams swapped out through the wheel wells on either side--didn't even take the wheels off, just jacked it up so there was more room, and cranked the wheel to either side. Just used a couple of wrenches (use box end on the sensor, don't remember size), put one on the O2 sensor, then use the other linked into the end of the other to pry with as an extension. The downstreams I got to from underneath, used an O2 sensor removal tool, but once you've disconnected the wires I see no reason a normal box end wrench won't take the downstreams off too.
Definitely knock any mud/crud off around the sensor and soak them with a good penetrating oil before trying to take them off just in case they're nice and rusted in there.
I recommend a box end wrench over an O2 sensor removal tool--i used both to remove mine and the removal tool nearly rounded off one of the upstream sensors due to the angle, luckily I was able to get the sensor out with a box end wrench.
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2004 SR5 4WD V8
, Titanium Silver, sunroof, HCF delete, K&N drop-in, Interior 6000K LED swap, map light mod, Denso Iridium TT 4702 spark plugs, Hankook DynaPro ATM tires, SilverStar Ultra lows/highs/fogs.