Change thermostat; are these all the (right) parts? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 01-12-2007, 11:34 AM   #1
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Default Change thermostat; are these all the (right) parts?

1998 LeSabre. Want to change out to a 180 degree thermostat.

Part numbers/descriptions from Rock Auto:

STANT Part # 10331 {Safety Release Vented Cap (Open or Closed System) - 16 psi (SAE Range 14-18 psi)} 16 psi Pressure Rating
STANT Part # 25273 {Thermostat Seal - 1 9/16" x 1 41/64" x 17/64" (Grooved, Molded)}
STANT Part # 45848 {Premium Thermostat - 180 Degree Superstat (1 23/32" x 29/32" x 29/32")} 180 Degree; Alternate Temperature
FEL-PRO Part # 35595 Thermostat gskt.

Are these the right parts?
Is there anything else (seals, gaskets, etc.) I would need?

Thanks.
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Old 01-12-2007, 11:37 AM   #2
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Nope, that should do it for you.

We usually recommend that you drill the thermostat before installation though. Among other minor benefits, it will make it much easier to obtain a fill without retaining trapped air.

Here'* the recommended Coolant Fill Procedure
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Old 01-12-2007, 11:54 AM   #3
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Thanks mucho, lash.

Response times around here are astounding!
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Old 01-12-2007, 12:04 PM   #4
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In actuality the cap is overkill. Nice touch though.

And we try on the time, late responses serve little to help with the question.
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Old 01-12-2007, 12:13 PM   #5
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Do a quick search on the proper method and pics for drilling the 'stat. Ideally you only need to drill two 1/16" holes, One at 12 o'clock and one at 6 o'clock.
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Old 01-12-2007, 12:34 PM   #6
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6 hours to install a stat??? Jeez.....




sorry.....
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Old 01-12-2007, 01:32 PM   #7
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No, smartarse. Just to drill the holes.... :P

FWIW, a pic of a drilled thermostat, courtesy Harofreak00. Note that these are large holes ( guess at 1/8"). I would suggest using 1/16" or 3/32" personally.

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Note to others. While I and many others here use a drilled thermostat, most of us have made this decision based on our knowledge an proper practice for doing so. If you're thinking of doing so, post and ask questions first so that you can make an informed decision for your case.

In this case, he lives in California, where he is more likely to see hot temps than extremely cold ones. The holes I'm recommending are relatively small and have a main purpose to keep the system from forming an air pocket at the 'stat.

Those in colder climates might find that the 180* 'stat does not work well in the winter months and delays engine warm-up.
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Old 01-13-2007, 01:05 AM   #8
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Thanks again for all the info.

I do plan to drill one 12 o'clock bleed hole (the last stat I did, on a 93 Nissan Altima, had one right out of the package).

I also plan to flush and switch out of Dexcool and into Prestone Extended Life.

And it does get cold here sometimes...just yesterday it got down into the 50'* at night
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