To drill or not to drill - 180 themostat in an L67 in AK - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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View Poll Results: What To Do
Leave It At 200 1 12.50%
Install A 180 5 62.50%
Install A 180 Drilled 2 25.00%
Voters: 8. You may not vote on this poll

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Old 11-29-2006, 11:11 AM   #1
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Default To drill or not to drill - 180 themostat in an L67 in AK

Since Bill brought this up, I got to thinking - Would you want a warmer engine in the winter, especially being up here, or does it matter. IMO you would want it running at 200

Thoughts?
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Old 11-29-2006, 11:14 AM   #2
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I'd do a non-drilled 180. I left my drilled 180 in last coupla winters and I've been fine; but I don't drive my car that often...

If it gets too cold, drive the 4x4 Suburban
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Old 11-29-2006, 11:17 AM   #3
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In your case Greg.. I'd stick with what you have.

(Actually..I didn't bring it up.. it was a split off.. Mod'* are making me look good..that'* all)

Edit: personal experience with the Intense (slightly drilled 180) in my car is that I'm not warming up until 3/4 of the way to work. It'* killing fuel mileage.
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Old 11-29-2006, 11:19 AM   #4
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Where you live, if you drive all year round, I would have two stats.
A 195 for winter and a drilled 180 for summer.
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Old 11-29-2006, 11:28 AM   #5
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Quote:
Originally Posted by BillBoost37
In your case Greg.. I'd stick with what you have.

(Actually..I didn't bring it up.. it was a split off.. Mod'* are making me look good..that'* all)

Edit: personal experience with the Intense (slightly drilled 180) in my car is that I'm not warming up until 3/4 of the way to work. It'* killing fuel mileage.
Do you have an Intense PCM?
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Old 11-29-2006, 12:32 PM   #6
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PCM has no bearing on a thermostat. With my setup and smaller pulley I do generate more heat than your stock setup and that is why I am running a drilled thermostat. However with the higher flow of an Intense model, drilling is not requried for me in the winter.
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Old 11-29-2006, 12:47 PM   #7
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Quote:
Originally Posted by BillBoost37
PCM has no bearing on a thermostat.
I know that - I ask because an intense PCM can be set for a 180 thermostat, thus making your car burn less gas while warming up
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Old 11-29-2006, 01:25 PM   #8
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Quote:
Originally Posted by Cheetah
Quote:
Originally Posted by BillBoost37
PCM has no bearing on a thermostat.
I know that - I ask because an intense PCM can be set for a 180 thermostat, thus making your car burn less gas while warming up
Mmm, not the way you think. The PCM can be set to turn on the fans at 180 etc, closed loop is closed loop and until the motor gets up to the operating temperature there is little you are going to change w/o running lean and causing other issues.

Let'* bring this one back to the thermostat question. In your clmate and your car being stock, either a 180 (may be on the cold side some days) or the stock 195 should work well.
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Old 11-29-2006, 01:38 PM   #9
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Quote:
Originally Posted by BillBoost37
Let'* bring this one back to the thermostat question. In your clmate and your car being stock, either a 180 (may be on the cold side some days) or the stock 195 should work well.
Your right Bill. I think I'll try a 180 for a week or so and see what it does. I still need to do a coolant swap so that should be a good time to replace it

Thanks for the input everyone
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Old 11-30-2006, 12:04 AM   #10
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I still think, at this time of year where you live you should stick with the 195.

It only takes 15 minutes to swap in the 180 come spring.
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