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  #1  
Old November 2nd, 2010, 13:34
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DieselSJ DieselSJ is offline
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thermostat housing bolts

1991 4.0

Bolts were pretty rotted so of course one broke when I was torquing it. I thought I'd just hit the dealership for replacements but nope...discontinued and they could not even tell me what size.

Anyone happen to know what size they are? If I was smart I would have measured or brought them with me today, but I figured the dealer would know the size. I want to hit up the bolt place on the way home, so if anyone has the size I'd greatly appreciate it.

Thanks!

Mark
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Old January 24th, 2011, 10:19
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Re: thermostat housing bolts

did you ever find out because i'm going through the same thing? just called them and said it was discontinued
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Old January 24th, 2011, 10:21
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Re: thermostat housing bolts

Just took them down to my local Ace Hardware (awesome bolt selection) and found some that were a perfect match. Cost me about $1.10 for both.
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Old January 24th, 2011, 10:37
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Re: thermostat housing bolts

you don't still remember that size do you? The place I took my head in for a valve job lost it and I don't feel like dealing with them to buy me a new one... the bolt I don't have is the long one (upper right)

Last edited by seigeXJ90; January 24th, 2011 at 10:44.
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Old January 24th, 2011, 11:19
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Re: thermostat housing bolts

I remember they are 5/16x18 thread. Don't remember the length. It was a standard size though - it wasn't some funky length.
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Old January 24th, 2011, 12:32
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Re: thermostat housing bolts

cool thanks.. i'll just bring the housing then and find one that fits
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Old January 24th, 2011, 13:20
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Re: thermostat housing bolts

just added info in case anyone else searches for this... i found a thread on another forum that has the info after i searched the specs you gave me:Upper thermostat bolt: 5/16"-18 x 1-1/2"
Lower thermostat bolt: 5/16"-18 x 3/4"
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Old January 25th, 2011, 21:49
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Re: thermostat housing bolts

If you use SS studs and loctite it will make things easier next time.
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Old January 26th, 2011, 08:46
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Re: thermostat housing bolts

Quote:
Originally Posted by joe_peters View Post
If you use SS studs and loctite it will make things easier next time.
x2, I would after working with water and metal, definitely go with Stainless if they are available.
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Old January 26th, 2011, 12:39
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Re: thermostat housing bolts

Home Depot has stainless steel hardware. Not sure about studs but the bolts are under the eye hook section between the lag bolts + carriage bolts and the bins of specialized hardware (grade 8 is here) at my local store.
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