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Removing A Broken Sensor from the Head

 
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Old 09-21-2009, 10:42 PM
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Removing A Broken Sensor from the Head

I broke the coolant temperature gauge sensor while putting it into the head and it will not budge. I tried using an extractor but that did nothing...does anyone have any idea what I can do to remove this sensor?
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Old 09-21-2009, 11:16 PM
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Re: Removing A Broken Sensor from the Head

small pipe wrench if you can fit it wherever the sensor is and if its sticking out enough........take a pic of it
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Old 09-21-2009, 11:26 PM
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Re: Removing A Broken Sensor from the Head

Here are some pictures:



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Old 09-22-2009, 12:55 AM
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Re: Removing A Broken Sensor from the Head

get some easy outs. theres already a hole in it so thats 95% of the work right there. just get a large enough one to fit it. my friend snapped a bolt that holds his vc on. i drilled a hole in it and used easy outs. altogether it took like 3 minutes to get out. something like this
http://buy1.snapon.com/catalog/item....e=&dir=catalog
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Old 09-22-2009, 09:28 AM
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Re: Removing A Broken Sensor from the Head

I already tried using an extractor like the one you linked to. It did not work, but maybe I did it wrong.

Basically what I did was place the extractor into the hole, then hammer it in, then turn it and it just kept getting tighter and tighter but the sensor never moved position. Obviously I was turning it counter-clockwise.
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Old 09-23-2009, 01:37 PM
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Re: Removing A Broken Sensor from the Head

I'm at a loss...I'm thinking of using a heat gun to heat up the area and hopefully the sensor will come loose.

I assumed the sensor was made out of brass and looked up the coefficient of thermal expansion for it and compared it to aluminum (the head) and the aluminum will expand more than the brass sensor.

Does this sound like a good idea?
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Old 09-23-2009, 01:45 PM
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Re: Removing A Broken Sensor from the Head

hmmm I dunno. did you try going to a machine shop or engine shop and asking for advice?
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Old 09-23-2009, 01:47 PM
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Re: Removing A Broken Sensor from the Head

or, since there is a little bit sticking out, get a punch and try to hammer that lip towards the center, and try and get it out with needle nose pliers
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Old 09-23-2009, 02:12 PM
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Re: Removing A Broken Sensor from the Head

extractors should work perfectly. maybe soak it in PB-blaster first??
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Old 09-23-2009, 02:31 PM
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Re: Removing A Broken Sensor from the Head

I already tried using a punch, but after I took the pictures. I should have said that. The punch just sheared the excess pieces off.

The bolt itself is not rusted at all. It had some old liquid gasket on it when I removed it but I cleaned all that off and the threads on the sensor were mint. I don't understand why the extractor wouldn't work either.

I was using a #5 extractor (not sure if the sizes are standardized) and it just got really tight without moving the sensor. It got to the point that I was a little worried about cracking the head. So I put on a #4 extractor but that was too small to catch enough of the sensor.

My only worry about using a heat gun is the brake line that's about an inch away from the sensor. It's a hard line, so it doesn't really want to move anywhere.
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