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| Forum name | Performance/Engine |
| Topic subject | ? about changing cat |
| Topic URL | https://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=77824 |
77824, ? about changing cat
Posted by shybuck, Jul-18-04 05:41 PM
are the bolts on the downpipe flange that meets the cat thread trough the downpipe flange or just the flange on the cat?
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77832, RE: ? about changing cat
Posted by techboy, Jul-18-04 06:02 PM
Just the flange on the cat. If your car is older spray them up good with wd-40 and let it sit on there for a day if your trying to take them out.
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77850, RE: ? about changing cat
Posted by Star Turbo Talon, Jul-19-04 11:06 AM
they are studs threaded into the cat. 12mmX1.25 is the pitch. from my experience if yours are heavily rusted get a nut splitter to break the nut. this way you save the stud and the nuts can be purchased at home depot or Ace.
If you have access to oxy/acetalyne then heat them up red hot and they will come off easy.
Terry
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77917, RE: ? about changing cat
Posted by shybuck, Jul-20-04 05:54 PM
i was just going to torch the bastards off then replace with new hardware. Just want to be sure they werent threaded in to the flange except the cat it self.
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77919, RE: ? about changing cat
Posted by techboy, Jul-20-04 05:59 PM
If you are going to do that and your new cat has threads on it too, get a big drill and ream them out. Then just get new hardware that slips through - much easier to deal with in the future. I did that for inspection purposes ..... I can have my cat back on for inspection in about 15 minutes, including putting the car up. :thumbsup
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