C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

O2 Sensor Replacement

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Old Nov 25, 2003 | 12:16 PM
  #1  
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Default O2 Sensor Replacement

I need to replace the O2 sensor on my 85. Prices range from $25.00 (PEP Boys), $39.00 + shipping (Eckler's) to $52.81 (Chevy Dealer) for the part plus about $66.00 installation. Question how easy it for me to install? Also what is a Code 8 Engine and is there anything significant in the spec when ordering the O2 sensor other than 1985 Vette not a California car?
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Old Nov 25, 2003 | 12:26 PM
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Default Re: O2 Sensor Replacement (hillb)

8 is the character in your VIN that says you have an L98 engine. This is a SIMPLE job for you to do. Rent an oxygen sensor socket at autozone for $15 and get your $15 back when done. Drive the car up on some ramps, remove the old, install the new. I have the Bosch sensor from Pepboys.
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Old Nov 25, 2003 | 12:40 PM
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Default Re: O2 Sensor Replacement (scorp508)

Mine cost $25-30 when I installed it just pulled it up on some ramps took the old one out and installed the new one. Never used the o2 sensor socket just a wrench. Now the car runs fine that fixed my problem. :D
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Old Nov 25, 2003 | 01:23 PM
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Default Re: O2 Sensor Replacement (hillb)

Should car be hot or cold when this is done?
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Old Nov 25, 2003 | 01:55 PM
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Default Re: O2 Sensor Replacement (Unriced)

I did mine cold but if you cant get the old one out when it is cold you can run it for a min. get the exhaust manifold hot to loosen it up a bit
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Old Nov 25, 2003 | 03:39 PM
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Default Re: O2 Sensor Replacement (vetteguy216)

I did mine cold but if you cant get the old one out when it is cold you can run it for a min. get the exhaust manifold hot to loosen it up a bit
Very simple to do. A 7/8 shorty wrench from Sears will make the job easier.
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Old Nov 25, 2003 | 03:48 PM
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Default Re: O2 Sensor Replacement (ittlfly)

A 7/8 shorty wrench from Sears will make the job easier.
:iagree: as this is exactly how I changed both of mine.
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Old Nov 26, 2003 | 01:32 AM
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Default Re: O2 Sensor Replacement (Goody)

O2 sensor was $26.99 for a Bosch Premium one at AutoZone. I had to get the special socket for another $8 as I have headers, still cheaper than any other option! Cost me $33 total and took longer to get the car in the air than it did to change it.

Doug


[Modified by Dougs 90, 12:33 AM 11/26/2003]
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Old Nov 26, 2003 | 01:35 AM
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Default Re: O2 Sensor Replacement (hillb)

How often should the O2 sensor be replaced?
thanks
tony
:flag
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Old Nov 26, 2003 | 09:08 AM
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Default Re: O2 Sensor Replacement (oldace84)

I've owned cars where the O2 sensor lasted well over 100K miles, and others that needed replacement every 40-60K. That's a big range, but our vettes shouln't be different from the typical car. I suspect (but can't provide proof) that the better brands (Delco, Bosch) last longer than the no-name cheapies.

With a scanning tool you can look at the O2 sensor response, which tells you if it's going lazy (their response gets sluggish). When they crap out-it's obvious.
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Old Nov 26, 2003 | 04:01 PM
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Default Re: O2 Sensor Replacement (sraft)

Sensors can age and it may be a little more difficult detecting a weak O2 sensor with OBD1 (On Board Diagnostics Version One)vs OBD II>

If you have some extra money, time, and like changing parts, around 50K miles, some suggest you would be wise to change out O2 sensors. Very subjective. Have driven some over 155K and never looked back. Changed out the vettes when changing exhaust pieces. Just depends.

Good luck all.

dlmeyers 90 coupe zf6 3 speed shocks


[Modified by dlmeyers, 3:02 PM 11/26/2003]
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Old Nov 27, 2003 | 08:10 PM
  #12  
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Default Re: O2 Sensor Replacement (dlmeyers)

Does anyone know how to test if an O2 is bad? I was thinking mine might be part of the reason for my ordinary mileage.

:cheers:
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Old Nov 28, 2003 | 09:37 PM
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Default Re: O2 Sensor Replacement (Chris O')

Do a search in the archives for this one. Someone just did a great write up on how to test your O2 sensors.

The basics, are that you put a multimeter to the o2 sensor and then watch the response. The numbers should fluctuate rapidly. If not, you have a problem. The sensors are cheap enough, and easy enough to replace, that it couldn't hurt to just swap them out.

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