160 degree thermostat
Thread Starter
Pro
Joined: Dec 2003
Posts: 690
Likes: 11
From: The Beach
160 degree thermostat
Trying to install a 160 degree thermostat in my 2001 C5 and the thermostat is too big to fit in the water pump. The thermostat assembly is 2" across at its widest point. The opening in the water pump is only about 1 3/4". The stock thermostat assembly is about 1 1/2" across. Double checked the part number and it's the correct part number for a C5 What's wrong????
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
Yes GM changes the configuration of the water pump thermo assembly
If you bought your car used chances are the water pump has been already changed using the new configuration --Take the thermo back and get the correct one
PS: remember unless you re-tune your fans to come on earlier to accommodate the lower thermo---your engine will NOT run cooler !!! As the stock fan settings have #1 coming on at 225* and #2 at 235* so even with the 160 the fans are coming on too late to add any additional cooling
I would have the fans set to something like this with a 160
#1 on at 200
#1 off at 197
#2 on at 205
#2 of at 201
If you bought your car used chances are the water pump has been already changed using the new configuration --Take the thermo back and get the correct one
PS: remember unless you re-tune your fans to come on earlier to accommodate the lower thermo---your engine will NOT run cooler !!! As the stock fan settings have #1 coming on at 225* and #2 at 235* so even with the 160 the fans are coming on too late to add any additional cooling
I would have the fans set to something like this with a 160
#1 on at 200
#1 off at 197
#2 on at 205
#2 of at 201
Safety Car
Joined: Mar 2015
Posts: 3,638
Likes: 245
Trying to install a 160 degree thermostat in my 2001 C5 and the thermostat is too big to fit in the water pump. The thermostat assembly is 2" across at its widest point. The opening in the water pump is only about 1 3/4". The stock thermostat assembly is about 1 1/2" across. Double checked the part number and it's the correct part number for a C5 What's wrong????
Drifting
Joined: Nov 2014
Posts: 1,978
Likes: 110
From: Switzerland
get sum-365-160 for $25 or so.
my car runs at 178° with it. i have the first fan set to 183° and the second to 190°. i never heard the second one comming on.
its possible your temp. will initially be higher, drive the car a few times and it will settle down, mine did..
my car runs at 178° with it. i have the first fan set to 183° and the second to 190°. i never heard the second one comming on.
its possible your temp. will initially be higher, drive the car a few times and it will settle down, mine did..
Team Owner
Joined: May 2001
Posts: 87,357
Likes: 1,592
From: Western NY
If you still have the original style, 2001 water pump, and t'stat housing, I suggest the p/n 5234685, 180* t'stat from PRW. I have one in my car, and it runs at 182* all day long, without messing with any fan settings. I simply put it in, and off I went.....
Pro
Joined: Jan 2016
Posts: 550
Likes: 53
From: Fort Myers Florida
Trying to install a 160 degree thermostat in my 2001 C5 and the thermostat is too big to fit in the water pump. The thermostat assembly is 2" across at its widest point. The opening in the water pump is only about 1 3/4". The stock thermostat assembly is about 1 1/2" across. Double checked the part number and it's the correct part number for a C5 What's wrong????
