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Old 08-27-2012, 08:33 AM   #1
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Angry bolt size for t-stat housing

Hola guys,

Well I am probably the worlds slowest mechanic as it comes to finding time to getting around to fix the Jeep, but alas, I found the clogging in my hoses that lead to my constant over heating... I went to put the thermostat housing back in, but it didn't flush mount because the thermostat itself slid down... SNAP!!! went the housing...

I bought a new housing, but it doesn't come with new bolts... what size bolts go on the housing? I can't get the top one out of the original housing, so I figured I might as well replace it all....

Cliffs notes:

broke thermostat housing
bolts are old and starting to strip
what size bolts needed for thermostat housing




thanks!
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Old 08-27-2012, 11:44 AM   #2
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anybody? I'm hoping to get the bolts after work and fix it tonight!!
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Old 08-27-2012, 11:47 AM   #3
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5/16-18 thread
Top one is 1 3/4 long, bottom is 3/4 long

https://www.google.com/search?q=Jeep...hrome&ie=UTF-8
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Old 08-27-2012, 11:55 AM   #4
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that sounds about right, and I was googling just thermostat bolt jeep, leading me to threads about how to extract them stripped.

thank you though!
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Old 08-27-2012, 06:11 PM   #5
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The threading is right, but the top one is more like 2 1/2 long. The 2 inch one barely threads. So im not gonna push it.
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Old 08-28-2012, 02:00 AM   #6
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The threads seize because the steel screw ends up losing its zinc plating, and it rusts to the iron head.

To prevent this? Either use brass/bronze screws (a marine supply house should have them,) or coat the threads and screw shank with RTV before you install it (does double duty as a light-duty threadlocker, and seals the threads as well.)
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Old 08-28-2012, 02:00 AM
 
 
 
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