Boxster catalytic converters - fix, replacement?

[Homeoboxter]

Originally Posted by Jager

Are you absolutely sure it's the catalytic converter and not gravel bouncing around in the catalytic converter/exhaust heat shield?

It is the primary cat that's one piece with the header. I think that has no shield. If you knock it with a hammer something rattles inside. I'm not looking forward to get it off, I wonder how many of the M8s are gonna snap.

[Starter986]

Originally Posted by Homeoboxter

It is the primary cat that's one piece with the header. I think that has no shield. If you knock it with a hammer something rattles inside. I'm not looking forward to get it off, I wonder how many of the M8s are gonna snap.

I'd be spraying penetrating oil on those bolts then, when ready to start removing them... try to remove one. Resistance? Apply the flame. Me? I'm applying that oil liberally, and a few times.

Read long ago about removing a resistant nut/bolt. Recommendation was to try to, lightly, give the wrench some encourgement clockwise (tightening). Just enough encouragement to hear/feel the threads "give". I wouldn't give it but an eighth of a turn then backing off trying to emove the nut/bolt. Repeat.

Had an E30 that had the rattling. Was unmistakeable... a cat.

Good luck on the header removal!

[Homeoboxter]

Originally Posted by Starter986

I'd be spraying penetrating oil on those bolts then, when ready to start removing them... try to remove one. Resistance? Apply the flame. Me? I'm applying that oil liberally, and a few times.

Read long ago about removing a resistant nut/bolt. Recommendation was to try to, lightly, give the wrench some encourgement clockwise (tightening). Just enough encouragement to hear/feel the threads "give". I wouldn't give it but an eighth of a turn then backing off trying to emove the nut/bolt. Repeat.

Had an E30 that had the rattling. Was unmistakeable... a cat.

Good luck on the header removal!

Thanks! I'll try the tightening/loosening method with some WD40. One bolt is already broken into the head so I don't have high hopes about the others. It's gonna be fun to drill it out since I don't have a lift. If they won't budge I might as well pull the engine, I wanted to do some work on it anyways.