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Im currently trying to install a turbo back exhaust with a mate. Apart from the obvious little hiccups, we are having a real issue with removing the sensor in the old cat. I dont know what it does, or if its needed, but the spanner on it is just rounding the nut as its too rusted in. WD-40 has not helped. What does this thing do? Do we need it or can it just be cut out?

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no nothing bad will happen. due to the angle of the wires, mine had been half cut through, so the sensor would sometimes come on as soon as i turned the key in the morning. i got sick of the light flashing on every time i hit a bump so i disconnected it.

i had a problem with that aswell, i had a mechanic mate look at it and we were both too worried we would shear the bolt head off, so i decided to get a workshop 2 take it off and fit it so theyd have 2 deal with it if they did.... got the dump/front removed and put in for $115... took about 2 hours coz the guy who did it was quite clueless about the whole thing

Yep weve had a few dramas. Basically we had everything removed but the top half of the dump pipe. We got 3 of the 6 bolts out but could do no more. As it was getting dark we just refitted the dump and stock cat and have left it at that, will be getting a workshop to fit it for me this week. Unfortunetly though im now driving a terribly loud car and im paranoid about being defected.

temp sensor as said. Juts take it off. I replaced my cat last week and just tucked it up under the car.

as for the bolts..u'd be suprised how many people don't use exactly the right size and hence when they use some force...round the head or nut.

I had issues geeting my stock dump pipe off...with the right size and a good length you can get some force onto it. I used a rachet for some though which has an extendable arm for greater torque. but good quality spanners and ring spanners work a treat of u have space.

I used the WD40 beforehand. Then when they still wouldn't come off, try using your socket extension and a rubber mallet to give them a good knock. It is probably corroded so if you can break up the oxidised rubbish between the nut and the flange, it'll come off a whole lot easier.

That said, I still needed to use the rattle gun for the last stubborn sucker.

All the best dude

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