To drill or not to drill - 180 themostat in an NA - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-29-2006, 09:58 AM   #11
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I did not see it mentioned, but could a drilled 180 t-stat reduce the possibility of the LIM /UIM gaskets from going out because it'* running cooler?
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Old 11-29-2006, 10:01 AM   #12
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That'* the theory. It can delay the inevitable. But the proper fix is to replace the UIM with a better design, and a smaller EGR stovepipe. (then replace the DEX with non-DEX and use the aluminum framed LIM gaskets).
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Old 11-29-2006, 01:59 PM   #13
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Default drill bit size

i Used a3/16th bit too big or too small
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Old 11-29-2006, 02:01 PM   #14
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Default Re: drill bit size

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Originally Posted by Tracy34
i Used a3/16th bit too big or too small
Tracy..are you asking a question? It'* unclear from your capitalization and lack of punctuation.
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Old 11-29-2006, 02:12 PM   #15
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Tracy, I personally think 3/16" is tending towards the over-large size for drilling the T-stat.

I run a drilled 180*...two 3/32" holes, one each at 12 and 6 and have noticed no negative side, but then I live in Florida if that makes a difference to anyone.
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