V8 O2 sensor changing tips?
#1
![Default](/forum/images/icons/icon1.gif)
At 127k mi I want to change the O2 sensors on the Jag, mileage is down to 18 mpg in town heavy mixed driving; used to be 20+.
Jag have done a great job of hiding the sensors away behind heat shields and plastic bits.
The front muffler has to come out the get at the sensors from beneath. Any ideas how I can do this in my driveway?
Thanks,
Dan
Jag have done a great job of hiding the sensors away behind heat shields and plastic bits.
The front muffler has to come out the get at the sensors from beneath. Any ideas how I can do this in my driveway?
Thanks,
Dan
#3
#4
![Default](/forum/images/icons/icon1.gif)
If you have mileage issue I would just replace the 2 upstreams, it's really not that hard. The one on the passenger side is very easy, just use a 22mm open end wrench to remove. The one on the driver's side you can move the water reservior to the side, tie it with a coat hanger to the hood strut so it's out of the way, remove the heat shield with a 35mm torx bit then remove 2 (not 3) nuts that hold the heatshield bracket onto the exhaust flange. to remove the sensor use a 22mm open end and a 23mm open end. Use them alternately as each one can only unscrew the sensor a little at the time. Reverse process to install new sensor.
I got my Bosch sensors from Amazon for $60.00 each, works real nicely.
I got my Bosch sensors from Amazon for $60.00 each, works real nicely.
The following users liked this post:
jaginblack (05-30-2011)
#5
![Default](/forum/images/icons/icon1.gif)
Thanks, Icebreaker!
I wasn't looking forward to taking the exhaust off!
Is the coolant reservoir drained before being tied off?
Not quite sure about using a 23 and 22 wrench, is the larger wrench to get a purchase on the sensor? I have a sensor socket, perhaps that would work?
Got mine at Amazon too, good deal!
Cheers,
Dan
I wasn't looking forward to taking the exhaust off!
Is the coolant reservoir drained before being tied off?
Not quite sure about using a 23 and 22 wrench, is the larger wrench to get a purchase on the sensor? I have a sensor socket, perhaps that would work?
Got mine at Amazon too, good deal!
Cheers,
Dan
#7
![Default](/forum/images/icons/icon1.gif)
The reason I used the open end wrenches is so that I wouldn't have to drop the exhaust if I were to use the O2 socket. The reason for using both the 22 and 23 mm wrech is because one wrench can only turn the sensor a little and I used the little bigger wrench to turn it a little bit more, you just need a little patience as you can only turn the sensor a little at a time but this way you won't have to drop the exhaust. No I didn't disconnect the reservoir, just tied it out of the way.
Trending Topics
#8
#11
#13
![Default](/forum/images/icons/icon1.gif)
Danny,
Here's the link:
http://www.amazon.com/Bosch-13441-Ox...359615&sr=8-12
By the way, if your upstream O2 sensors are bad it is possible that the downstream ones could also show bad as it is reading what the upstream sensors are adjusting which may not be correct as they are bad.
Alan.
Here's the link:
http://www.amazon.com/Bosch-13441-Ox...359615&sr=8-12
By the way, if your upstream O2 sensors are bad it is possible that the downstream ones could also show bad as it is reading what the upstream sensors are adjusting which may not be correct as they are bad.
Alan.
Last edited by Icebreaker; 11-04-2009 at 01:55 PM.
#16
![Default](/forum/images/icons/icon1.gif)
Go to amazon and select Automotive department. Type in oxygen sensor. At the top of the results is a little box "Part finder". Select your car and all the sensors fitting your year and model will be shown. It's a matter of going through them to see which ones fit either the top or bottom. Generally only two Bosch sensors (one for the top and one for the bottom) will be shown.
#17
#18
#19
#20
![Default](/forum/images/icons/icon1.gif)
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
The key thing is to put the time in to identify the correct sensor - there are so many different types, I looked for ages before finding enough information to be able to identify the correct replacement.