Tsia Posted August 18, 2013 Share Posted August 18, 2013 Hi all, Trying to get my head around the way the exhaust system etc works. I know there's a cast bit that attaches to the manifold with an o2 sensor slot, but then I notice that the 1st decat also has an o2 sensor slot. Does the decat replace this part? If not, would there not be two o2 sensors? Probably being stupid, but hey. Cheers Link to comment Share on other sites More sharing options...
chris0132 Posted August 18, 2013 Share Posted August 18, 2013 It's a cat heat sensor mate you just remove it and most just cable tie it to the chassis Link to comment Share on other sites More sharing options...
Tsia Posted August 18, 2013 Author Share Posted August 18, 2013 Ahh, I see! B*gger, there I was thinking I was going to get away with not having to source this bit by getting a decat - nevermind! Thanks. Link to comment Share on other sites More sharing options...
safcdixon Posted August 18, 2013 Share Posted August 18, 2013 The one in the 1st cat or decat is the cat overheat sensor, some decats come with the hole fir refitting some dont, the o2 sensor is in the cast part sbove the first cat which stays in place I think thats what your asking mate Edit i was far Too slow Link to comment Share on other sites More sharing options...
Tsia Posted August 18, 2013 Author Share Posted August 18, 2013 That's exactly what I was asking Link to comment Share on other sites More sharing options...
chris0132 Posted August 18, 2013 Share Posted August 18, 2013 Do you mean the decat pipe you've found has the hole in it for the sensor the decat I'm about to fit doesent have the hole for a sensor so I'm just tie'ing it to the chassis Link to comment Share on other sites More sharing options...
Mace Posted August 18, 2013 Share Posted August 18, 2013 Useful I needed to know that one, If you dont have the Cat temp sensor what happens if its not even plugged in to the loom? Link to comment Share on other sites More sharing options...
safcdixon Posted August 18, 2013 Share Posted August 18, 2013 Do you mean the decat pipe you've found has the hole in it for the sensor the decat I'm about to fit doesent have the hole for a sensor so I'm just tie'ing it to the chassis Either way works, i think its just there too make a neater more stock looking job, i also have mine tied to the chassis as mine didnt come with the a sensor hole either Useful I needed to know that one, If you dont have the Cat temp sensor what happens if its not even plugged in to the loom? As far as im aware the circuit needs to be complete otherwise the overheat light will illuminate Link to comment Share on other sites More sharing options...
chris0132 Posted August 18, 2013 Share Posted August 18, 2013 As a heads up I've just been told its a nightmare of a job too gonna try and do mine tomorrow and really not looking forward to it can be it being a long ass job and fiddly Link to comment Share on other sites More sharing options...
hackin_n_bashin Posted August 18, 2013 Share Posted August 18, 2013 It's not the end of the world. Couple of hours with the right tools and it'll come off. Give all the nuts and bolts a good soak beforehand with plug gas. I've not had the cat overtemp sensor in for a couple of years, and it's unplugged under the dash, the circuit isn't complete and my light isn't on. - - - Updated - - - As a heads up I've just been told its a nightmare of a job too gonna try and do mine tomorrow and really not looking forward to it can be it being a long ass job and fiddly Where in the west mids are you mate, I'll be in Walsall all next week. Link to comment Share on other sites More sharing options...
chris0132 Posted August 18, 2013 Share Posted August 18, 2013 It's not the end of the world. Couple of hours with the right tools and it'll come off. Give all the nuts and bolts a good soak beforehand with plug gas. I've not had the cat overtemp sensor in for a couple of years, and it's unplugged under the dash, the circuit isn't complete and my light isn't on. - - - Updated - - - Where in the west mids are you mate, I'll be in Walsall all next week. I'm in Birmingham mate about 5 minutes from the airport Link to comment Share on other sites More sharing options...
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