Guess who gets to pull the O2 housings??

[Chris GTO TT]

This guy...yup thats right went to replace the O2 sensors and the rear one fucked the bung up so at this point i'm pulling the housings and just going to replace them.

[bridge]

have fun! i broke a stud fri. i forgot to add heat to the equation after spraying pb blaster.

[Jeremy C]

you can't heli-coil it?

[Chris GTO TT]

nope brought all the threads from the housing out with it shit looks like a clean untapped bung LOL

[Jeremy C]

then you should still be able to heli-coil it. proper heli-coil requires you to tap the hole bigger then put the coil in. If it didn't take too much extra material there should be enough to tap it out. I had to tap heli coil all 3 of the trans mount holes due to them getting all buggered up from so many pulls.

[Chris GTO TT]

right but what O2 sensor would fit into that larger hole?

[VR4]

Get the right helicoil and it will work fine. Otherwise its pretty easy to pull the rear O2 housing

[Chris GTO TT]

This also gives me an excuse to gut the precats and fix the leaks at my down pipe. so its not a big deal really.

[Chris GTO TT]

So after 5 months my car is done, both O2 sensors replaced and replaced the motor mounts with poly mounts while I had it that far apart. The good news the new O2 Sensors seem to have fixed my light throttle hesitation at low rpms.

[HLxDrummer]

Glad to see it fixed your issue after all the work! I think I need to change my O2s as well :(

How do you like the poly mounts?

[Chris GTO TT]

Glad to see it fixed your issue after all the work! I think I need to change my O2s as well :(

How do you like the poly mounts?

I got the stiffer ones from paul here and so far i like them, there is a noticeable amount of vibration at idle but not too bad. You feel it mostly at startup. I know people say that solids arent much worse than poly but i'm glad i didnt get soild mounts. My stock motor mounts were really in pretty good shape just the rear was cracked, but not as bad as some peoples i've seen.

[vroom4]

Did you end up using that gutted precat? I cant remember if I even ever sent it haha.

[HLxDrummer]

Thanks for the info. I don't want much more vibration than stock (definitely not as much as solids!) but I've heard that stiffer mounts are better for the drivetrain.

[green-lantern]

You know I've been thinking of replacing my O2 sensors. When I did my TT conversion I used one sensor from a California NA manifold. Shit went up around then down and had a bunch of O2 sensors. I'm not sure if they are the same or not. I was just in a hurry and didn't get new ones. The car seems to run a bit funny in closed loop so it got me thinking I should replace them.

[Chris GTO TT]

Did you end up using that gutted precat? I cant remember if I even ever sent it haha.
Yours and the other one i ended up with both appear to be off a JDM motor since they don't have the O2 bung. That wasn't really a problem since I had ordered new bungs and was planning on welding them on. The problem I had was no EGR port. And since I was getting the car smogged right after I got it running again I needed to have that on there. So I ended up using the one I took off my car.

Thanks for the info. I don't want much more vibration than stock (definitely not as much as solids!) but I've heard that stiffer mounts are better for the drivetrain.

There are noticeably more vibrations at start-up and idle, however I wouldn't say its obnoxious. Also from what I've read the poly mounts seem to soften up after a little of use, but i wonder how much of that is just getting used to the vibrations. Overall I highly recommend replacing the motor mounts, this whole project really made my car a lot more fun and easy to drive. My mounts were in fairly good condition and even I noticed a large decrease in drivetrain slop. If you are concerned with vibration issues paul offeres a softer polyurethane for his mounts.


You know I've been thinking of replacing my O2 sensors. When I did my TT conversion I used one sensor from a California NA manifold. Shit went up around then down and had a bunch of O2 sensors. I'm not sure if they are the same or not. I was just in a hurry and didn't get new ones. The car seems to run a bit funny in closed loop so it got me thinking I should replace them.

When I was shopping for O2 Sensors I noticed that they changed over the years, my 91 had different O2 sensors than 92's so that may be why they are a little different. I couldn't really figure out what was different about them all I know is the O2 sensors were more expensive for my car than others lol.

[green-lantern]

When I was shopping for O2 Sensors I noticed that they changed over the years, my 91 had different O2 sensors than 92's so that may be why they are a little different. I couldn't really figure out what was different about them all I know is the O2 sensors were more expensive for my car than others lol.

3sx has a crapload of different models on their site. I'm not sure what the difference is. Did you get stock or aftermarket? I can get some bosch (I believe) ones by tomorrow and they are supposedly different from front to rear but it could just be the length of the wire or something.

[Chris GTO TT]

3sx has a crapload of different models on their site. I'm not sure what the difference is. Did you get stock or aftermarket? I can get some bosch (I believe) ones by tomorrow and they are supposedly different from front to rear but it could just be the length of the wire or something.

I got OEM exact fit style Denso sensors. I just didn't want to have to cut up the wires and splice the OEM style connector to the 'universal' O2 sensors. The front wire is much shorter than the rear so that is a difference in part numbers.

[green-lantern]

I got OEM exact fit style Denso sensors. I just didn't want to have to cut up the wires and splice the OEM style connector to the 'universal' O2 sensors. The front wire is much shorter than the rear so that is a difference in part numbers.

Cool, so that seemed to help how it ran at part throttle around town driving? Mine seems to running funny like that. I might just need to go get a tune.

[Chris GTO TT]

Well my car is fairly stock (Intake, EBC, and Downpipe), and as long as i've owned my car (since 2003) it has always had an odd loading up feeling between 2000 and 3000rpm. If I gave it too much throttle below 2500rpm the car would load up and then surge into power. When I was out driving around yesterday gave it a LOT of throttle down low at 1800rpm and the car pulled smoothly away from that point.

[green-lantern]

Good to know, that sounds a lot like mine. It cant hurt, and I do know that one is a NA sensor with about 160k miles and the other, like I said was pulled out of a CA NA model so maybe I'll save a bit of gas anyway. Auto Zone will have them tomorrow.

[green-lantern]

BTW did you end up gutting your cats?

[Chris GTO TT]

BTW did you end up gutting your cats?

nope didn't do that because of the smog (yes i know it should pass with just a main cat but not worth the risk of failing a CA smog test.). Because i didn't change really anything else I'm almost positive that the new O2's fixed my issues.

[green-lantern]

Because i didn't change really anything else I'm almost positive that the new O2's fixed my issues.

That's what I was wondering. ha ha

[Chris GTO TT]

O2 sensors have a life span of 60-100k from what i've read so it should help if you replace them...

Also the rear motor mount is a bitch i wouldnt go after it if you dont have the rear precat out or need to get it out for something else.

[green-lantern]

When I talked to the guy at the part store he mentioned it said to replace every 50k but it was from a part store dude so take it for what it's worth. Mine are way past their mileage anyway.

[Chris GTO TT]

yeah they still 'work' when they are past age but arent as accurate