SimonB Posted August 8, 2002 Share Posted August 8, 2002 Anyone know the part numbers for the gasket that goes between the 1st CAT and the turbo elbow (or whatever it's called) on a Jspec ? Oh, and the bolts that hold it on as well ? I think I'd be there all day if I tried to find out from Toyota... I presume it's a good idea to change these while removing the CAT ? Quote Link to comment Share on other sites More sharing options...
Terminator Posted August 8, 2002 Share Posted August 8, 2002 I think you will find most after market cat removal pipes will not require a gasket, just use a good quality exhaust sealing compound. That it all I have in mine. I have a gasket as I ordered it to use but then discovered I did not need it as it won't fit. If you use the correct tools you should be able to get the bolts off with plenty of WD40 soaking in for a while before. I will have a look at my parts CD and find the part number for the nuts and post later. Unless someone beats me to it. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 8, 2002 Share Posted August 8, 2002 Originally posted by SimonB Anyone know the part numbers for the gasket that goes between the 1st CAT and the turbo elbow (or whatever it's called) on a Jspec ? Oh, and the bolts that hold it on as well ? I think I'd be there all day if I tried to find out from Toyota... I presume it's a good idea to change these while removing the CAT ? The first cat is held up to the elbow by studs and nuts. Without welding gas gear you almost certainly won't get the studs out of the elbow without snapping them, UNLESS they happen to unscrew from the elbow the first time you undo the nuts, rather than the nuts unscrew from the studs, as should happen. The studs sometimes come out instead, but it's rare. I have part numbers somewhere, the studs are a rare metric fine thread, and from Toyota are ludicrously expensive, but top quality material. I doubt you will find the correct overall and thread lengths and pitch elsewhere.The all metal locknuts are very dear too. You can use other nuts if you can find a metric fine supplier. If you are fitting my front cat pipe just use a hefty smear of exhaust sealant paste (white stuff in a tube, any car accesory shop will have it) on the flange of the pipe where it mates with the elbow, ensuring the elbow has had ALL crud scraped off it first. Do not try and use the crushable sealing ring the cat uses. The flange will deform and leak if you actually manage to get the ring to sit in place. The flanges are ground flat to give a perfect seal, the ring is not required nor is its usage desirable. If you snap a stud off you are in trouble, don't make i worse by cack handed attempts to drill it out, you can make things a lot worse VERY easily! My advice is if the nuts seem to try and "pick up" once the initial high torque yield is broken, do NOT try and carry on turning, just nip them up and get professional help. Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted August 9, 2002 Share Posted August 9, 2002 hi i have just decided to fit my all in 1 downpipe i bought off paul whiffins car,i was dreading the 3 manifold nuts after all the storys of them been hard to get off.after struggling for ages to get to them i got them off with not too much bother.thought that would be it the hard part out the way. but i was wrong, the mid cat pipe i have fitted already was a bitch i ended up rounding the nut off and could not get off,tried allsorts.also the o2 sensor nut got rounded off too got one out,just got pi**ed off in end and booked it in to local garage to fit he is charging 25 quid all in,done hardest part of getting manifold nuts off. the hard part for me is if you struggle and not have the right tools.i was doing the work off a standard jack and trolley jack with a wheel under car in case it drops.cant beat having a ramp to get to car easy.i have just started to buy a few tools to start doing my own small work.got a gasket and some exhaust paste off eyefi (thanks mate) i will see how i go with boost when it gets fitted today.if i am getting too much i will be getting both cw pipes. use plenty of wd40 i used a can soaking all the nuts.cant wait to have it fitted see how much better it goes and sounds no cats and blitz nur spec and cams if worst comes to worst i have my exhaust silencer which might act as a restrictor Quote Link to comment Share on other sites More sharing options...
SimonB Posted August 9, 2002 Author Share Posted August 9, 2002 Cheers guys. I won't bother replacing them then. I'm off on holiday tomorrow, so I'll do it when I get back. In fact I'm quite tempted to just go down the local exhaust place and get them to do it. I'm just too lazy to exert myself undoing bolts... Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted August 9, 2002 Share Posted August 9, 2002 just got mine done what a difference i am hitting 1.1 bar only had a little play in wet with traction control set on dry setting its spinning a lot more now but will have to test in dry conditions it does seem a lot faster. the all in 1 pipe i have had put on is smaller than the mid section de cat pipe i have took off.sounds louder and revs more freely too. next time i see you eyefi will show you more testing needed Quote Link to comment Share on other sites More sharing options...
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