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What size bolts hold the thermostat housing on?

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Old 06-01-2011, 04:12 PM   #1
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Default What size bolts hold the thermostat housing on?

What size socket do I need to remove the thermostat housing from my 1993 5.0?
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Old 06-01-2011, 05:15 PM   #2
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I would guess 13 mm. I will tell you after I do my 92 this weekend lol.
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Old 06-01-2011, 05:18 PM   #3
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It's a 13mm. I've replaced it once. In Ford terms, it might be a 1/2 since it seems that some bolts are metric and some are SAE. The 2 are interchangeable, but there is a slight difference in size. Go with whichever one has the best fit.
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Old 06-01-2011, 08:38 PM   #4
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The thread is 5/16x18 and the head is 1/2.
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Old 06-02-2011, 03:53 PM   #5
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Yeah I found out last night thanks a 13 mm will fit as well. I also found out BE CAREFUL the thermostat doesn't fall out of the housing when you put it in. Coolant tends to kinda gush everywhere when the thermostat is between the seal and the housing not in the seat and kinda makes you have to do it twice.
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Old 06-02-2011, 03:55 PM   #6
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Thank you
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Old 06-02-2011, 07:13 PM   #7
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Mine was a 13 mm, I used super glue to hold in my themostat while installing it. The heat will break down the super glue into microscopic particles that will not bind to anything.
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