Oxygen sensor install questions.

[Gary Allan]

They recommend disconnecting both cables (NEG first just to prevent arching while disconnecting the POS) and then grounding the POS cable for 30sec. to discharge any stored energy ...but your way sounds easier. "They" being DC/jeep.

 

[leftlane]

Originally Posted By: Gary Allan
How does one change a battery without disconnecting the neg terminal

That usually only happens once every 5-7yrs which would be less assumed risk than disconnecting it many times during that same period for maintenance. How is it that people are frying their electronics when disconnecting or connecting their batteries? That is what I'd like to avoid so I'll do what has been posted here so far to prevent that and thanks everyone for your info.

 

[Gary Allan]

Just curious. There's lots of stuff that I've been exposed to here that I've never heard of before. Brake fluid flushing, routine total hose replacement, etc. (said in the way Monty Python did "No one expects the Spanish Inquisition!") I mean, just think about DeathCool

 

[leftlane]

I like to change the brake fluid every 3yrs but I dont flush it. "Bring out your dead!"

 

[severach]

Quote:
How does one change a battery without disconnecting the neg terminal


There are widgets that maintain power to your vehicle through the lighter or other connectors while the battery is changed.

The instructions that came with my Denso oxygen sensor were similar to these I found online.
Quote:
CAUTION: Correct torque of oxygen sensor is critical to prevent crushing glass beads in graphite anti-seize compound. Crushing glass beads will cause sensor to seize in exhaust manifold. This may necessitate replacement of exhaust manifold at the next removal.
Installation
1) Whenever an oxygen sensor is removed, coat threads with anti-seize compound before it is reinstalled. New oxygen sensors already have this compound applied to threads.
2) Install oxygen sensor in exhaust pipe. Tighten sensor to 30 ft. lbs. (41 N.m).


Additional instructions indicated that impact hammers can destroy oxygen sensors. You might need to use an impact to remove an old sensor but do not use an impact hammer to install one.

One oxygen sensor I could not remove even with the torch. The manifold just ate up too much heat. I drove the car until the manifold was at maximum temperature then immediately applied the torch and 1/2" impact. It came out but the Snap-on sensor socket was ruined.

 

[leftlane]

Severach did you try penetrating lube? If not then maybe it wouldve spared your socket.

I wish I had impact wrenches for installing/uninstalling things in tight spaces that way you wouldnt have to try breaking a bolt lose in a hot 2" space by hand. I'll have to get those before its over with.

 

[Kestas]

Originally Posted By: severach
... It came out but the Snap-on sensor socket was ruined.

Had you known the O2 sensor was junk, you could have snipped the wires and used a regular deep-well socket.

 

[firemachine69]

Get that Snap-On replaced under warranty! At fourty bucks a pop, I'd do it!

 

[severach]

I'm sure I tried lube and waited 24 hours but it took all that Ohio Blue Tip had to offer to get it off. I like breaking Snap-on sockets anyways.

Not too long later Bosch made their sensors larger so the old Snap-on sensor sockets wouldn't fit. I called it a defect but it wasn't reason enough for Snap-on to replace it.