O2 sensor loose
Senior Member
Joined: Jul 2009
Posts: 2,761
Likes: 76
From: Massachusetts
Let me explain my reasoning,
Our O2 sensors use a crush washer... you should always use a new crush washer when re installing an O2 sensor. The washer crushes but wants to re expand thus locking the threads together...
I'm trying to save him from searching for a crush washer for the O2 and also save him from aggravation when the loc tight doesn't work... Either heats up and liquefies or cooks and kills the male and female threads upon the next removal... (see trashed threads below)
here's one of our type I just pried the crush washer from, you wouldn't even know it was there till you push a screw driver against it...
Trust me, a quick tap with a punch and it won't back out, it's a mechanical weld and is easily broken loose by hand... also use never seize on it, the slight grit texture will help lock it as well as keep it from freezing up in the threads and ending up like the one I just took a picture of...
Our O2 sensors use a crush washer... you should always use a new crush washer when re installing an O2 sensor. The washer crushes but wants to re expand thus locking the threads together...
I'm trying to save him from searching for a crush washer for the O2 and also save him from aggravation when the loc tight doesn't work... Either heats up and liquefies or cooks and kills the male and female threads upon the next removal... (see trashed threads below)
here's one of our type I just pried the crush washer from, you wouldn't even know it was there till you push a screw driver against it...
Trust me, a quick tap with a punch and it won't back out, it's a mechanical weld and is easily broken loose by hand... also use never seize on it, the slight grit texture will help lock it as well as keep it from freezing up in the threads and ending up like the one I just took a picture of...
Thread Starter
Senior Member
Joined: Sep 2011
Posts: 1,109
Likes: 2
Originally Posted by A7X
Let me explain my reasoning,
Our O2 sensors use a crush washer... you should always use a new crush washer when re installing an O2 sensor. The washer crushes but wants to re expand thus locking the threads together...
I'm trying to save him from searching for a crush washer for the O2 and also save him from aggravation when the loc tight doesn't work... Either heats up and liquefies or cooks and kills the male and female threads upon the next removal... (see trashed threads below)
here's one of our type I just pried the crush washer from, you wouldn't even know it was there till you push a screw driver against it...
<img src="https://www.f150forum.com/attachment.php?attachmentid=66107"/>
Trust me, a quick tap with a punch and it won't back out, it's a mechanical weld and is easily broken loose by hand... also use never seize on it, the slight grit texture will help lock it as well as keep it from freezing up in the threads and ending up like the one I just took a picture of...
Our O2 sensors use a crush washer... you should always use a new crush washer when re installing an O2 sensor. The washer crushes but wants to re expand thus locking the threads together...
I'm trying to save him from searching for a crush washer for the O2 and also save him from aggravation when the loc tight doesn't work... Either heats up and liquefies or cooks and kills the male and female threads upon the next removal... (see trashed threads below)
here's one of our type I just pried the crush washer from, you wouldn't even know it was there till you push a screw driver against it...
<img src="https://www.f150forum.com/attachment.php?attachmentid=66107"/>
Trust me, a quick tap with a punch and it won't back out, it's a mechanical weld and is easily broken loose by hand... also use never seize on it, the slight grit texture will help lock it as well as keep it from freezing up in the threads and ending up like the one I just took a picture of...