X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from vms173019pub.verizon.net ([206.46.173.19] verified) by logan.com (CommuniGate Pro SMTP 5.3.10) with ESMTP id 4599828 for flyrotary@lancaironline.net; Thu, 02 Dec 2010 10:52:04 -0500 Received-SPF: pass receiver=logan.com; client-ip=206.46.173.19; envelope-from=finn.lassen@verizon.net Received: from [75.203.145.140] ([unknown] [75.203.145.140]) by vms173019.mailsrvcs.net (Sun Java(tm) System Messaging Server 7u2-7.02 32bit (built Apr 16 2009)) with ESMTPA id <0LCT00KJA5DJNV70@vms173019.mailsrvcs.net> for flyrotary@lancaironline.net; Thu, 02 Dec 2010 09:51:21 -0600 (CST) Message-id: <4CF7C075.6070903@verizon.net> Date: Thu, 02 Dec 2010 10:51:17 -0500 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Help - O2 sensor removal References: In-reply-to: Content-type: multipart/alternative; boundary=------------060208080602090906000205 This is a multi-part message in MIME format. --------------060208080602090906000205 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit As I recall, even with heating the bung to red hot it was still a bitch to unscrew the sensor. You definitely will want a wrench on the bung to prevent it from twisting in the exhaust header and creating a weak spot around the weld there. Especially if the header is of relatively thin material like 0.035 SS. Finn On 12/2/2010 9:16 AM, Al Gietzen wrote: > > *Subject:*[FlyRotary] Re: Help - O2 sensor removal > > Use anti- seize next time. > > Brian Trubee > > Looking at the new Bosch O2 sensor, I find the threads amply covered > with an anti-seize compound; and recall the prior one was the same. So > that's been done. Haven't had a chance yet to have another go at > removing it, but I'm sure it will get done. Meanwhile the current one > is still functional. > > Thanks, > > Al > > -----Original Message----- > From: Al Gietzen > To: Rotary motors in aircraft > Sent: Tue, Nov 30, 20102:39 pm > Subject: [FlyRotary] Help - O2 sensor removal > > After about 130 hrs my O2 sensor seemed to be getting a little > sluggish; so I decided to replace it. I put a wrench on it and unable > to budge it. A bigger wrench and still no luck -- getting worried > about cracking the weld around the bung, or some other damage. Any > ideas about getting that thing loose? > > I didn't put anything on the threads when I put it in -- perhaps next > time; but what? > > -- > Homepage:_http://www.flyrotary.com/_ > Archive and UnSub:_http://mail.lancaironline.net:81/lists/flyrotary/List.html_ > --------------060208080602090906000205 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit As I recall, even with heating the bung to red hot it was still a bitch to unscrew the sensor. You definitely will want a wrench on the bung to prevent it from twisting in the exhaust header and creating a weak spot around the weld there.
Especially if the header is of relatively thin material like 0.035 SS.

Finn


On 12/2/2010 9:16 AM, Al Gietzen wrote:

Subject: [FlyRotary] Re: Help - O2 sensor removal

 

Use anti- seize next time. 

Brian Trubee

Looking at the new Bosch O2 sensor, I find the threads amply covered with an anti-seize compound; and recall the prior one was the same. So that’s been done.  Haven’t had a chance yet to have another go at removing it, but I’m sure it will get done. Meanwhile the current one is still functional.

Thanks,

Al

 

-----Original Message-----
From: Al Gietzen <ALVentures@cox.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, Nov 30, 2010 2:39 pm
Subject: [FlyRotary] Help - O2 sensor removal

After about 130 hrs my O2 sensor seemed to be getting a little sluggish; so I decided to replace it. I put a wrench on it and unable to budge it.  A bigger wrench and still no luck – getting worried about cracking the weld around the bung, or some other damage.  Any ideas about getting that thing loose?

 

I didn’t put anything on the threads when I put it in – perhaps next time; but what?

 

 

 


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