180 thermo -vs- 160 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 03-09-2004, 11:18 AM   #1
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Default 180 thermo -vs- 160

I noticed most of you have the 180 thermo mod and only a few the 160. Is there an advantage to the 180 over the 160? Wouldn't the 160 be the 'cooler' mod?
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Old 03-09-2004, 11:47 AM   #2
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the 160 would be pretty much dedicated to track use. Your PCM wouldn't like it for a daily driver.

I prefer a drilled 180 myself.
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Old 03-09-2004, 02:45 PM   #3
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Bill hit it on the nose, 160 is for track use ONLY. You want a 180 for a street car.
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Old 03-09-2004, 04:53 PM   #4
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I dunno, I don't have any problems with my 160, but my chip is tuned for it.
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Old 03-09-2004, 05:44 PM   #5
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DRILLED 180, splain that to me, please
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Old 03-09-2004, 06:52 PM   #6
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yeah... drilled = ?
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Old 03-09-2004, 07:41 PM   #7
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Drilled one or more holes in the rim of the thermo, so coolant can always flow just a little.
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Old 03-09-2004, 10:37 PM   #8
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Quote:
Originally Posted by jwikoff99
Drilled one or more holes in the rim of the thermo, so coolant can always flow just a little.
How big (and where) should you drill these holes?
Anyone got any pix?
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Old 03-09-2004, 10:41 PM   #9
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Well, I did it when I used a 180. Two holes, close to the center on the outer rim, maybe 1/16" or 3/32". You could do up to four, I've heard. I don't have any pics, but here is a pic from ZZP (I hope they don't mind):
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Old 03-09-2004, 10:48 PM   #10
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Quote:
Originally Posted by willwren
the 160 would be pretty much dedicated to track use. Your PCM wouldn't like it for a daily driver.

I prefer a drilled 180 myself.
I too have to agree with Bill here.....
A 160 would be too cold for street use only. A 180 on the other hand works well, especially if you drill no more than 2 - 1/16" holes in it too. a 160 will NEVER let the engine come up to operating temp for the ECU/PCM & will throw code after code too. A 180 will not throw a code unless something else is at fault.
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