GeneralDisorder Posted October 24, 2006 Share Posted October 24, 2006 What size tap am I going to need to clean out the threads on the stock EA82 y-pipe? I've got to do two of these things tommorow. I shattered the first one, and took an impact to it. The sensor threads just disintigrated - left all the thread metal in the cat. So I'm going to have to buy a tap for it since my set doesn't go quite that big.... GD Quote Link to comment Share on other sites More sharing options...
torxxx Posted October 24, 2006 Share Posted October 24, 2006 12x1.0 IIRC. If no one else posts up an answer I will check one at work tommorow for ya Quote Link to comment Share on other sites More sharing options...
NorthWet Posted October 24, 2006 Share Posted October 24, 2006 IIRC (from 6 years ago ) it is the same thread as the spark plugs. I used a common dual ended sparkplug tap/chaser... 18mm/14mm? Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted October 24, 2006 Author Share Posted October 24, 2006 Hhhhmmmm - old spark plug with some grooves cut in the threads, and a slight taper ground at the end? I'll take a look at that. Thanks a bunch! GD Quote Link to comment Share on other sites More sharing options...
NorthWet Posted October 24, 2006 Share Posted October 24, 2006 ... or $5-10 for a proper hardened-steel chaser... bought mine at NAPA Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted October 24, 2006 Author Share Posted October 24, 2006 Yeah - I should probably own one anyway. But I'm all about "feild expediency" as we used to call it.... you should see the neutral switch I created today.... any excuse to use my welder I suppose. GD Quote Link to comment Share on other sites More sharing options...
NorthWet Posted October 24, 2006 Share Posted October 24, 2006 All well and good... until you try to clean galled/welded threads out of that weld-hardened bung. How many modified splugs do you want to wear out in the process? Mine was a (minor) bear to clean out even with the chaser. Me, I am in to "lazy" when I can. Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted October 24, 2006 Author Share Posted October 24, 2006 Heh - if one plug doesn't do the trick, it's off to the tool department. Last time I took one of these out, it actually came out (big fight tho). This time it just ate the threads. Pretty ugly really. GD Quote Link to comment Share on other sites More sharing options...
NorthWet Posted October 24, 2006 Share Posted October 24, 2006 Yeah, I ripped all the threads of of mine... well, it was my bro-in-law's, but now it is mine. EGO sensor came out looking pretty smooth where all of the threads were supposed to be. That was before I read that there was a procedure for removing EGOs (something like: warm engine, turn EGO 1/4 turn, spray on penetrant and go away for 24 hours before turning again). Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted October 24, 2006 Author Share Posted October 24, 2006 That's a nice procedure! Too bad the y-pipe isn't on a car yet. ...... and I already tore it out with my impact. Hooray for air! Quicker to cut the thing off, impact it, and then chase the threads. Whole countries have been overthrown in 24 hours. GD Quote Link to comment Share on other sites More sharing options...
daeron Posted October 24, 2006 Share Posted October 24, 2006 wonderful timing for this thread, i need to replace my O2 sensor and we have a couple spares at the shop.. now I just need to look up the vehicle whence they came, and see if this matches the subie. thanks guys :- ) oh and spark plug thread chasers FTW:headbang: every cheap*ss needs one. Quote Link to comment Share on other sites More sharing options...
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