ASemper Posted August 22, 2016 Share Posted August 22, 2016 As I've been...gently guided towards the decat route by several friends there is the obvious MOT to deal with. Not sure if I should ask but are there any 'friendly' MOT testers near Camberley, GU15, area? Maybe its best to PM me? If not, do you decat guys swap in your cats once a year? Sent from my SM-G900F using Tapatalk Quote Link to comment Share on other sites More sharing options...
Ekona Posted August 23, 2016 Share Posted August 23, 2016 Just swap them back in, it's a 30min job tops. 1 Quote Link to comment Share on other sites More sharing options...
RS8055 Posted August 23, 2016 Share Posted August 23, 2016 Just swap them back in, it's a 30min job tops. Seriously? A 30 minute job even for a complete novice such as myself (obviously with a guide)? Quote Link to comment Share on other sites More sharing options...
brillomaster Posted August 23, 2016 Share Posted August 23, 2016 assuming you have a jack, axle stands and some spanners, its simply nuts and bolts. Quote Link to comment Share on other sites More sharing options...
RS8055 Posted August 23, 2016 Share Posted August 23, 2016 assuming you have a jack, axle stands and some spanners, its simply nuts and bolts. Don't decats throw up a CEL? How do I ensure that the car starts fine everyday (I have a code reader)... but does that mean I need to constantly reset the ECU? Quote Link to comment Share on other sites More sharing options...
veilside z Posted August 23, 2016 Share Posted August 23, 2016 Get some spacers from zmanalex buddy to space out the sensors. I suppose if you can't find a friendly tester, then you will have to swop them out. Quote Link to comment Share on other sites More sharing options...
Ekona Posted August 23, 2016 Share Posted August 23, 2016 Just swap them back in, it's a 30min job tops. Seriously? A 30 minute job even for a complete novice such as myself (obviously with a guide)? Yup, as Brillo said it's honestly incredibly simple. Quote Link to comment Share on other sites More sharing options...
Adrian@TORQEN Posted August 23, 2016 Share Posted August 23, 2016 (edited) Just swap them back in, it's a 30min job tops. This must be the joke of the month With no ramp and no professional tools, it will be at least 2hrs. It will take you half an hour just to jack the car up and start removing the undertray... If you have some rusty bolts and they start rounding or snapping, it will be more than that. @Dan, sorry, didn't mean to be rude, just joking. Edited August 23, 2016 by Adrian@TORQEN 8 Quote Link to comment Share on other sites More sharing options...
StevoD Posted August 23, 2016 Share Posted August 23, 2016 Sean From SJB did it on the floor no hard task at all 1 Quote Link to comment Share on other sites More sharing options...
davey_83 Posted August 23, 2016 Share Posted August 23, 2016 all for a few bhp LOL Quote Link to comment Share on other sites More sharing options...
bizizl Posted August 23, 2016 Share Posted August 23, 2016 (edited) 30 minutes is not realistic. By the time you jack up the car, and actually figure out what you're looking at, it might be close to 10-15 minutes. Aim for two hours for your first time doing something like this. There are two awkward nuts (one on each cat) where the cats go up and attach to the manifold. I had to use a ratchet with a knuckle attached to tighten these up. Expect the two nuts on the bottom of each cat where the cat attaches to the y-pipe to be rusted to @*!#, and shear. Make sure you soak all of the nuts and bolts in wd40/plusgas/<insert-rust-penetrator> for some time beforehand (a day/overnight would be ideal). You may need to use a knuckle/extension bars to sufficiently tighten the pipes back on once you have swapped them out. You can risk it providing you don't have a CEL, but it's up to you to decide whether or not it's worth your time for a potential re-test fee. Feel free to PM me if you have any issues or questions surrounding this. p.s. I'd suggest making sure these bolts/nuts are really tight, maybe use some high-temp thread lock. Edited August 23, 2016 by bizizl 2 Quote Link to comment Share on other sites More sharing options...
davey_83 Posted August 23, 2016 Share Posted August 23, 2016 What work is carried out from the engine bay/top side? Quote Link to comment Share on other sites More sharing options...
bizizl Posted August 23, 2016 Share Posted August 23, 2016 What work is carried out from the engine bay/top side? None Quote Link to comment Share on other sites More sharing options...
coldel Posted August 23, 2016 Share Posted August 23, 2016 Get sports cats, most pass the mot. 1 Quote Link to comment Share on other sites More sharing options...
ASemper Posted August 23, 2016 Author Share Posted August 23, 2016 Thanks all My cat to Y pipe studs were rusty lumps and...interesting to remove with my limited tools but I managed it in the end. So I would be happy to swap decats in/out when required, even if it takes more than 30mins for me. Was mainly seeing if many people did know of friendly testers so I can be lazy Have had a PM anyway, cheers guys! Sent from my SM-G900F using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
ASemper Posted August 23, 2016 Author Share Posted August 23, 2016 all for a few bhp LOL And the extra noise Sent from my SM-G900F using Tapatalk Quote Link to comment Share on other sites More sharing options...
GMballistic Posted August 23, 2016 Share Posted August 23, 2016 all for a few bhp LOL And the extra noise That's the best bit. 1 Quote Link to comment Share on other sites More sharing options...
Irn Bru Posted August 23, 2016 Share Posted August 23, 2016 all for a few bhp LOL And the extra noise That's the best bit. The worse bit......is running lean and engine damage if not mapped 1 Quote Link to comment Share on other sites More sharing options...
ASemper Posted August 23, 2016 Author Share Posted August 23, 2016 all for a few bhp LOL And the extra noise That's the best bit. The worse bit......is running lean and engine damage if not mapped Decat along with plenum spacer is all i need/want before remap so will have uprev done pretty much as soon as those are on Sent from my SM-G900F using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
Irn Bru Posted August 23, 2016 Share Posted August 23, 2016 all for a few bhp LOL And the extra noise That's the best bit. The worse bit......is running lean and engine damage if not mapped Decat along with plenum spacer is all i need/want before remap so will have uprev done pretty much as soon as those are on Sent from my SM-G900F using Tapatalk Very wise decision. 1 Quote Link to comment Share on other sites More sharing options...
bizizl Posted August 24, 2016 Share Posted August 24, 2016 The worse bit......is running lean and engine damage if not mapped Is there any evidence behind this? Surely it runs rich if it thinks there's more air flowing through the "cats" than there actually is? Quote Link to comment Share on other sites More sharing options...
davey_83 Posted August 24, 2016 Share Posted August 24, 2016 no, more air IS actually passing thru the engine with bolt on's ie air filter, plenum spacer, hfc or decats and exhaust system. Quote Link to comment Share on other sites More sharing options...
Richf Posted August 24, 2016 Share Posted August 24, 2016 Very unlikely to be lean the air flow is read by the meters anyhow, plus stock cars are very rich from the factory , thats really not a concern Quote Link to comment Share on other sites More sharing options...
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