> What year Honda? How many miles on it?
Its a 98 Civic with 75,000 miles

> Just want to double check: Have you tried soaking the threads as best you
> can in PB Blaster for a few times a day, then overnight, or similar, then
> tried breaking them free?
I've never used PB Blaster, I sprayed with wd40..
Because I'm working under the car with the car on ramps and jack stands I
dont have enough room to get good leverage so I ususlly have to cut off
these stuborn nuts/bolts.

I expected to be able to then remove what was left of the bolts and replace
them with new ones. These seem to be one with the flange???

Steve

>
> PB Blaster is remarkable stuff. It freed some nasty exhaust bolts/nuts on
> which I was working a couple of years ago, though it still took some
> serious leverage.
>
> I think the exhaust bolts are second only to certain suspension bolts in
> seizing over time. The suspension bolts are prone to break before they
> free. People seem to have much more luck with exhaust bolts.
>
> "Steve" <junk@therivets.net> wrote
>> The front of the cat has a flexable connections with bolts and springs.
>> No problem here. The back end of the cat has three threaded studs/bolts
>> coming out of the flange. I'm hoping to reuse the cat but I cannot get
>> these three bolts out of the cat.. I had to cut the rusted nuts off to
>> disassemble and I need to be able to bolt this end of the cat onto the
>> new pipe I'm replacing. Looks like I'm going to have to grind the flange
>> flush on both sides and drill the holes out to accept three new bolts????
>>
>> I've never seen perminant bolts like this?? I've seen a fixed nut on one
>> flange but not the bolt.????
>>
>> When I look up new Catalytic converters it looks like there are holes
>> there not threaded studs???
>>
>> Could these bolts be badlt rusted in place? I wacked it pretty hard and
>> have just about cut one of the "heads" off (they look like a "t" head not
>> a nut shape) and the shaft of the bolt wont budge... Like its part of the
>> flange..
>>
>>
>> Is this unusual????
>>
>>
>> Thanks
>>
>> Steve
>>
>
>