Gramps Posted June 5, 2021 Report Share Posted June 5, 2021 Hi all. I'm looking to fit some Topgear sports headers on my gen 2 Boxster S. I didn't want to get half way through the job and come across seized bolts so I've removed greased and retightened all bar 2 of my infamous manifold bolts (my 3/8 drive knuckle and extension bars arrived yesterday so will hopefully do the remainder today), luckily no issues so far. Ideally, if possible if the wiring allows, I'd prefer to undo the sensors (providing they're not seized of course) and leave them attached to the car then screw them back in the new headers once fitted, or if that is not possible to disconnect them from the loom and then remove them in situ on the original headers and transfer them to the replacement headers once the original headers are off? If the latter option then can anyone advise me where the connectors are for the O2 sensors? I've tried following the loom with my fingers but it just disappears out of reach. There are several videos on YT but they are all for Gen 1s. Any info and/or advice most welcome. Cheers in advance Rob (AKA Gramps) Quote Link to comment Share on other sites More sharing options...
Laney456 Posted June 6, 2021 Report Share Posted June 6, 2021 So we did this exact job yesterday... we applied heat to the old sensor thread for about 30 seconds and they came out easily. Connector... if you've got car jacked up get under (head towards the front) and the connector was reasonably easy to find... just trace the wire. There is also a little plastic clip you need to remove use ... put it in the same position on new sensor vs. Old one by laying them side by side. Quote Link to comment Share on other sites More sharing options...
Ninesomething Posted June 6, 2021 Report Share Posted June 6, 2021 On 6/5/2021 at 1:11 AM, Gramps said: Hi all. I'm looking to fit some Topgear sports headers on my gen 2 Boxster S. I didn't want to get half way through the job and come across seized bolts so I've removed greased and retightened all bar 2 of my infamous manifold bolts (my 3/8 drive knuckle and extension bars arrived yesterday so will hopefully do the remainder today), luckily no issues so far. Ideally, if possible if the wiring allows, I'd prefer to undo the sensors (providing they're not seized of course) and leave them attached to the car then screw them back in the new headers once fitted, or if that is not possible to disconnect them from the loom and then remove them in situ on the original headers and transfer them to the replacement headers once the original headers are off? If the latter option then can anyone advise me where the connectors are for the O2 sensors? I've tried following the loom with my fingers but it just disappears out of reach. There are several videos on YT but they are all for Gen 1s. Any info and/or advice most welcome. Cheers in advance Rob (AKA Gramps) I've considered doing this - be interested to know what you think when it's all done. Quote Link to comment Share on other sites More sharing options...
Gramps Posted June 6, 2021 Author Report Share Posted June 6, 2021 3 hours ago, Laney456 said: So we did this exact job yesterday... we applied heat to the old sensor thread for about 30 seconds and they came out easily. Connector... if you've got car jacked up get under (head towards the front) and the connector was reasonably easy to find... just trace the wire. There is also a little plastic clip you need to remove use ... put it in the same position on new sensor vs. Old one by laying them side by side. Cheers Laney456, just popped indoors for a cuppa before continuing and seen your post. I'd previously split the cat to rear section on the right so that side was fine but just tried splitting the same section on the left and the 1st bolt has already snapped 🙄. Shouldn't be a prob as I'm going to change the manifold and cat anyway and can deal with the removing the remainder of the bolt once it's all off. But currently struggling with undoing the 2nd sensor on the left (nearest the rear), it's well seized in there. Literally just dug out my blowtorch to try some heat. I'll have another go at tracing the wiring back. Did you locate where the rear airing disappears off to? Quote Link to comment Share on other sites More sharing options...
Gramps Posted June 6, 2021 Author Report Share Posted June 6, 2021 wiring, not airing??? Quote Link to comment Share on other sites More sharing options...
bally4563 Posted June 6, 2021 Report Share Posted June 6, 2021 4 hours ago, Gramps said: wiring, not airing??? If you remove the inner bulkhead/ inspection cover you can see it fastened on the inner side passenger side Quote Link to comment Share on other sites More sharing options...
Gramps Posted June 6, 2021 Author Report Share Posted June 6, 2021 3 hours ago, bally4563 said: If you remove the inner bulkhead/ inspection cover you can see it fastened on the inner side passenger side Cheers Bally4563. Never had the inner bulkhead cover off yet, always nice to find out that little bit more. Will take a peak 👍 Quote Link to comment Share on other sites More sharing options...
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