Thermostat Question
Thread Starter
Intermediate
Joined: Jun 2010
Posts: 48
Likes: 0
From: Mid-North Indiana IN
Thermostat Question
I am a new vet owner, considering changing to a 160 or 180 Thermo. Have read where I will need to have PMC changed. I called 2 GM service locations in my area. 1 said the tech certified to do it is no longer employed. The other told me that nothing could be done to change anything related to the fan and if it is changed it would effect the warranty. So my question is when changing the thermo do you need to have the PMC changed and where to you have that done in the Indiana area.
Le Mans Master
Joined: Oct 2001
Posts: 6,798
Likes: 25
From: Pine Bluff Arkansas
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21
The 160 will cool you down on the highway, but not in red-light traffic unless you program your fans to come on sooner. Reprogramming the fans would be messing with your computer and could void a warranty.
Get with the local Corvette club. They will know someone that can do your fans if you wish.
Larry
Get with the local Corvette club. They will know someone that can do your fans if you wish.
Larry
Drifting
Joined: Apr 2010
Posts: 1,443
Likes: 7
From: Bristol raceway area
I am a new vet owner, considering changing to a 160 or 180 Thermo. Have read where I will need to have PMC changed. I called 2 GM service locations in my area. 1 said the tech certified to do it is no longer employed. The other told me that nothing could be done to change anything related to the fan and if it is changed it would effect the warranty. So my question is when changing the thermo do you need to have the PMC changed and where to you have that done in the Indiana area.
Tech Contributor
Joined: Oct 1999
Posts: 41,063
Likes: 9,827
From: Charlotte, NC (formerly Endicott, NY)
It's a piece of cake to change, you can easily do it yourself. I wouldn't consider the 180*, you have a 187*. I put a 160* stat in our '09 and very satisfied with the results and you don't have to change anything else. Don't have to reset any fans unless you want cooler temps while stopped. Used to run 191-196* cruising now 172-176* which is where i like it. Enjoy your increased power
Bill
Melting Slicks
Joined: Jul 2009
Posts: 2,634
Likes: 1,099
From: South Florida
Any increase in power at those temps is incremental at best. Once you start running hard the coolant temp is determined by the cooling capacity and not the thermostat which just sets a floor on the temperature and does nothing about the ceiling. A wide open 195 degree thermostat flows just as much coolant as a wide open 160 thermostat.
Bill
Bill
Marcos
Drifting
Joined: Apr 2010
Posts: 1,443
Likes: 7
From: Bristol raceway area
Any increase in power at those temps is incremental at best. Once you start running hard the coolant temp is determined by the cooling capacity and not the thermostat which just sets a floor on the temperature and does nothing about the ceiling. A wide open 195 degree thermostat flows just as much coolant as a wide open 160 thermostat.
Bill
Bill
Bob
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Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
160° t'stat will make a power difference. The ECM pulls ignition timing with coolant temps above 195°.Betwen the ECM pulling timing for intake air temp and for coolant temp you can lose LOTS of HP.
Drifting
Joined: Apr 2010
Posts: 1,443
Likes: 7
From: Bristol raceway area
