11-26-2012, 11:27 AM
Senior TN Member
Join Date: Dec 2010
Location: Ramah, NM
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A cat that rusty may have failed internally- especially with 300k miles on the engine. Cat in my '91 was failed at ~270k miles. Removed the insides and never looked back.
If you need to smog it where you live, pull the cat and inspect it. It'll be fairly easy to tell if it has failed- if the leading face of it has a bunch of even square holes in it you're good... If some of the holes are plugged, it's no good. You can also look through it at a light, as they sometimes slag themselves in the middle (my '91 did this) and you can't tell they've failed looking at the leading face.
Hit those bolts with some PB Blaster, let them soak for a day or so. Hit them with some heat. Attack them with vise grips. You may need to cut into them with a hacksaw or a sawzall, then split them with a hammer and a cold chisel.
'88 Camry All-Trac DLX 5SFE 5-speed manual
'91 Camry base-model 3SFE 5-speed manual
'92 Geo Tracker 4x4
'78 Dodge LeisureCraft
'90 Ford Ranger 4x4