What size plug do i need to plug the hole where the o2 sensor goes? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

66olds442 · 03-25-2011, 12:49 PM

I was able to remove and reinstall 3 of the 4 o2 sensors on my new headers. One won't come out and I need something to plug up one of the empty holes where the o2 sensor should go. What size screw will I need or what should I ask for? The guys at my local auto shop have no idea and don't carry o2 sensors.

Thanks in advance.

joes407 · 03-25-2011, 12:57 PM

Quote:

Originally Posted by 66olds442

I was able to remove and reinstall 3 of the 4 o2 sensors on my new headers. One won't come out and I need something to plug up one of the empty holes where the o2 sensor should go. What size screw will I need or what should I ask for? The guys at my local auto shop have no idea and don't carry o2 sensors.

Thanks in advance.

when i did my 92 Z/28 headers i used a threaded metal pipe cap that i bought at ACE hardware. just match the threads to the threads on your sensor.

Russell James · 03-25-2011, 01:02 PM

Penetrating oil overnight. Then heat up the exhaust pipe bung around the sensor with a torch. Should come out. The service manual says to take out the O2's when the exhaust is still on the car and hot from driving. They spin right out if you do that. If left in a cold pipe, quite the hassle to get out but often a torch works.

66olds442 · 03-25-2011, 01:06 PM

Quote:

Originally Posted by Russell James

Penetrating oil overnight. Then heat up the exhaust pipe bung around the sensor with a torch. Should come out. The service manual says to take out the O2's when the exhaust is still on the car and hot from driving. They spin right out if you do that. If left in a cold pipe, quite the hassle to get out but often a torch works.

Thanks Russell james. I got 3 out while hot but this one just wouldn't break free. I let oil penetrate over night and still won't turn. Just need something to plug the hole up for the moment so I can drive my car.

clg_98ta · 03-25-2011, 01:29 PM

Don't know the size. You could take one of the sensors out of your new exhaust and take it to your hw store to find a nut that fits it. Then buy a short bolt that fits the nut.

Or just find a new sensor... most any auto parts store SHOULD carry O2 sensors, and muffler shops should have them as well.

And yes, heat will help getting the old sensor out. Be careful, since the penetrating oil is flammable, and make sure you don't have a puddle of it on your garage floor.

TornadoSS · 03-25-2011, 03:15 PM

Not exactly sure, I'm at work a the moment but I'm thinking that I used an M18 oil drain plug on my Harley (which uses the same sized GM style O2 sensor). I used an exhaust RTV on the threads. You might give that a shot.

Russell James · 03-25-2011, 03:20 PM

most are M18

03-25-2011, 12:49 PM	#1
66olds442 Born Olds, Living Chevy Drives: 2011 2SS/RS: VR A6 Join Date: Dec 2010 Location: New Mexico Posts: 2,080 View My Garage	What size plug do i need to plug the hole where the o2 sensor goes? I was able to remove and reinstall 3 of the 4 o2 sensors on my new headers. One won't come out and I need something to plug up one of the empty holes where the o2 sensor should go. What size screw will I need or what should I ask for? The guys at my local auto shop have no idea and don't carry o2 sensors. Thanks in advance. __________________

03-25-2011, 01:29 PM	#5
clg_98ta Drives: 2010 Camaro 2SS Join Date: Jan 2010 Location: Austin, TX Posts: 2,698 View My Garage	Don't know the size. You could take one of the sensors out of your new exhaust and take it to your hw store to find a nut that fits it. Then buy a short bolt that fits the nut. Or just find a new sensor... most any auto parts store SHOULD carry O2 sensors, and muffler shops should have them as well. And yes, heat will help getting the old sensor out. Be careful, since the penetrating oil is flammable, and make sure you don't have a puddle of it on your garage floor. __________________ Black 2SS ordered 1/4/2010, received 2/19/2010

03-25-2011, 03:15 PM	#6
TornadoSS WICKDSS Drives: 2011 1SS/RS IOM LS3 Join Date: May 2010 Location: Wichita, Kansas Posts: 1,111 View My Garage	Not exactly sure, I'm at work a the moment but I'm thinking that I used an M18 oil drain plug on my Harley (which uses the same sized GM style O2 sensor). I used an exhaust RTV on the threads. You might give that a shot. __________________ 2011 IOM SS/RS, M6. Look up our all generation Camaro club website at Heartland Camaros Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei 11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds.

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03-25-2011, 01:02 PM	#3
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	Penetrating oil overnight. Then heat up the exhaust pipe bung around the sensor with a torch. Should come out. The service manual says to take out the O2's when the exhaust is still on the car and hot from driving. They spin right out if you do that. If left in a cold pipe, quite the hassle to get out but often a torch works.

03-25-2011, 03:20 PM	#7
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	most are M18