Mk4Gaz Posted August 18, 2013 Share Posted August 18, 2013 Hi chaps, I fitted my 1st decat today, and after removing the original cat, I tried to get the sensor out of it, and mullered it! Am I right in thinking its just an egt sensor and not necessary, or is it anything more important than that? The bolts holding the plate to the cat had disintegrated to nothing, and the only thing left is the probe itself! Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted August 18, 2013 Share Posted August 18, 2013 Its just a cat overheat sensor, no cat means it has no use, just snip it off! Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted August 18, 2013 Author Share Posted August 18, 2013 Its just a cat overheat sensor, no cat means it has no use, just snip it off! Happy days, I thought as much, but thought it wise to double check!!! Cheers bud, that's put my mind to rest For the record, I never want to fit another 1st, what a total prat of a job to do! Quote Link to comment Share on other sites More sharing options...
safcdixon Posted August 18, 2013 Share Posted August 18, 2013 Its just a cat overheat sensor, no cat means it has no use, just snip it off! I thought snipping it put the cat overheat light on permenant? I just zip tied mine up out the way Quote Link to comment Share on other sites More sharing options...
chris0132 Posted August 18, 2013 Share Posted August 18, 2013 Happy days, I thought as much, but thought it wise to double check!!! Cheers bud, that's put my mind to rest For the record, I never want to fit another 1st, what a total prat of a job to do! Oh god is it that bad I'm doing mine tomorrow now I'm worried lol any tips like what socket sizes or any special tools you used? Quote Link to comment Share on other sites More sharing options...
chris0132 Posted August 18, 2013 Share Posted August 18, 2013 Oh and did you have the 2nd cat already off if so how much louder is it or sound wise different Quote Link to comment Share on other sites More sharing options...
Mugello Posted August 18, 2013 Share Posted August 18, 2013 I thought snipping it put the cat overheat light on permenant? I just zip tied mine up out the way Can anyone confirm this ? Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted August 18, 2013 Author Share Posted August 18, 2013 I did in fact just tie it up out of the way, although on the mr2's I've always just unplugged them and chucked them in the bin! Chris, its a total sod to get to the 3 bolts where the cat/decat joins to the manifold. Granted, 1 is worse than the other 2, but I think what made it worse is that they potentially have never been undone before - and doing it on your back on the driveway makes it really awkward! I ended up dropping the entire system, which made it much easier, and my car already has a second decat, but I had to cut the two bolts where it joined to the cat, as they were rusted to buggery! As for noise, its not much louder tbh, but a bit deeper and more of a burble - it sounds lovely in fact! I managed to strip the thread on one of the 3 manifold to decat studs, so I've only got 2 holding it on, its not blowing, but I'm going to have to get another stud at some point. Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted August 18, 2013 Author Share Posted August 18, 2013 Oh, before you tackle the job, make sure you have a wobbly/universal joint in your socket set, otherwise you'll never get a socket on the nuts. I used all 1/2" drive stuff, purely because of the leverage needed to crack the nuts undone - had to extend my ratchet with a jack handle Lol! Quote Link to comment Share on other sites More sharing options...
chris0132 Posted August 18, 2013 Share Posted August 18, 2013 Oh joy sounds like I'm going to have fun then was dreading it before but now I really am how long did it take roughly Quote Link to comment Share on other sites More sharing options...
Mk4Gaz Posted August 18, 2013 Author Share Posted August 18, 2013 Oh joy sounds like I'm going to have fun then was dreading it before but now I really am how long did it take roughly 4 bastard hours, and I'm certainly no spanner novice! Quote Link to comment Share on other sites More sharing options...
chris0132 Posted August 18, 2013 Share Posted August 18, 2013 Think I may give it my mate then to fit as he owns an exhaust shop you recon on a ramp would be alot easier then? Quote Link to comment Share on other sites More sharing options...
chris0132 Posted August 24, 2013 Share Posted August 24, 2013 Got mine on today took about 40minutes thanks to a mate who let us use his ramp Quote Link to comment Share on other sites More sharing options...
Mugello Posted August 24, 2013 Share Posted August 24, 2013 What did you do with the sensor in the end ? Quote Link to comment Share on other sites More sharing options...
chris0132 Posted August 24, 2013 Share Posted August 24, 2013 I just cut it off as my sensor was not gonna budge the nuts were round lol Quote Link to comment Share on other sites More sharing options...
Mugello Posted August 24, 2013 Share Posted August 24, 2013 I just cut it off as my sensor was not gonna budge the nuts were round lol Any light on the dash as a result ? Quote Link to comment Share on other sites More sharing options...
chris0132 Posted August 24, 2013 Share Posted August 24, 2013 Nope nothing mate, didn't know if one would come on but thankfully it hasn't and I've used it a few times today and still no light, so all is good just be careful trying to get the 3 nuts off the manifold end of the cat the 2 hardest to get to for me were fine but the easiest was a bit stubborn, if you can though get it on a ramp it literally took 40 minutes as you don't have to struggle to get to the nuts and you can get a nice long extension on the nuts Quote Link to comment Share on other sites More sharing options...
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