O2 sensor nuts

Just curious, has anyone found a way to keep these from rusting? Along with the studs also. Also never knew to stick with the Denso brand. Now I do. Thanks to others.

 

Because of the thermal cycling not much you can do.

Anything you would spray or coat the hardware with would just burn off.

You could try going to stainless steel studs and nuts.

 

No sure on the studs but when I replaced my o2 sensors I put these nuts on them:

$14 Micro Trader 12pcs Exhaust Manifold Nuts Head Stud Nut M8 Hex Copper Self Locking Car Parts

https://www.amazon.com/dp/B07GJHDLQY?ref=ppx_yo2ov_dt_b_product_details

 

@noodles93 Thank you. That is what I was looking for. Didn't even know copper was an option. Thanks again
John

 

coat em in ,,,anti seize......or that white high temp thread lock...

not as much the nut as its the stud that turns to dust eventually....

 

FMY (for my information) shopping at Home Depot or Lowes, what exactly would the package or single nut have as it’s spec on the package? I’m too am replacing an O2 sensor bank1 (

$136 Denso 234-9001 Upstream Air Fuel Ratio Oxygen Sensor with 10.6” 4-Wire Harness, for Auto Trans Equipped Vehicles

Denso 234-9001). M8? Is that the threading? What else will be on the package info? Just in case.

 

M8x1.25

I have found by the time the O2 sensor fails the studs are going to need replaced .

Most likely the whole exhaust system as well.

 

Not Mine! Damnit! (No whammy no whammy). Dry climate, non rust belt, USA. Much PB Blaster to be applied beforehand.

 

My first O2 sensors needed replaced around 230,000 miles .

I just replaced the whole exhaust because I had all the parts

I am glad your in a dry Climate and don`t need to fight the constant battle with rust.

 

Your cone heater element lasted a freakish amount of time. My PO131 CEL code indicates it’s the O2’s heater fail (at 123k). 230,000 miles? Unreal. Some report factory installed fail at 45K! They lament…”why is that?” You got lucky. Me? Lasted 123k.

 

About time I have good luck for once.

Maybe sensors and Cats were better in 2000.

I have had PO420 codes from leaking gaskets the only issues.

Other then pulling the front sensor harness out with the transmission.

 

Connectors…heh. 15 minutes to get the sensor nuts off, 35 minutes to unbuckle the harness connector.

 

There was no need to disconnect the harness connector that pulled apart just fine .

Found a 4 pin male and female connector soldered and heat shrink the top truck side connector on with lots more length.

Drop it down put the new connector on the O2 sensor side plug things in secure away from the exhaust no need to remove any rusted nuts or studs.

 

Ah. Side note. The

$136 Denso 234-9001 Upstream Air Fuel Ratio Oxygen Sensor with 10.6” 4-Wire Harness, for Auto Trans Equipped Vehicles

Denso 234-9001 actually comes in two variables. The 9002 and 9003. Both with longer cables. For what it’s worth.

 

This happened 100,000 miles ago .

When the sensor was replaced I just installed my plug and hooked things up.

 

I like using this to protect against future issues.
https://amzn.to/45tMie9

 

Been there buy Never seize by the case .In 3 different flavors .

Around Here on exhaust it might help break your nut loose it does not keep the studs from deteriorating or the nuts from thermal cycling and winter chemicals.

It goes on everything but engine internal hardware.

It never hurts.