2008 cooling fan air direction?
07-27-2023 | 09:15 PM
#11
Thread Starter
Member
Joined: 03-01-2022
Posts: 60
From: Portland Oregon
As for the temperature of the coolant I don't let it get as hot as it can cause I don't want to cause more problems so I shut the car off after it gets passed 220° my car even after driving for an hour on the freeway in 100° weather has never been over 220°
07-27-2023 | 10:50 PM
#12
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Joined: 01-23-2009
Posts: 25,339
From: Fredericksburg,VA
The t-stats purpose is to keep the temperature ABOVE 180F. It is the radiator and fans job to keep it below 220F.
The t-stat cannot cause overheating, unless something interferes with physics and the wax inside doesn't melt at 180F.
The t-stat opens at 180F, the fan turns on at about 219F (or when the AC compressor is on it is always on) then turns off when the temp is back down to 180F and the t-stat closes .
229F is NOT overheating, 225F IS overheating, which is why I asked what you mean by "overheating".
The usually cause of T-stat failure is a piece of rubber gasket from the cheap parts gets stuck in the t-stat valve holding it open so that the engine does not get to 180F in a timely fashion and at highway speeds igets below 180F.
Please explain the physics behind your shouted response. How can it cause overheating when its job is to keep the coolant hot?
The t-stat cannot cause overheating, unless something interferes with physics and the wax inside doesn't melt at 180F.
The t-stat opens at 180F, the fan turns on at about 219F (or when the AC compressor is on it is always on) then turns off when the temp is back down to 180F and the t-stat closes .
229F is NOT overheating, 225F IS overheating, which is why I asked what you mean by "overheating".
The usually cause of T-stat failure is a piece of rubber gasket from the cheap parts gets stuck in the t-stat valve holding it open so that the engine does not get to 180F in a timely fashion and at highway speeds igets below 180F.
Please explain the physics behind your shouted response. How can it cause overheating when its job is to keep the coolant hot?
07-27-2023 | 11:19 PM
#13
Thread Starter
Member
Joined: 03-01-2022
Posts: 60
From: Portland Oregon
The t-stats purpose is to keep the temperature ABOVE 180F. It is the radiator and fans job to keep it below 220F.
The t-stat cannot cause overheating, unless something interferes with physics and the wax inside doesn't melt at 180F.
The t-stat opens at 180F, the fan turns on at about 219F (or when the AC compressor is on it is always on) then turns off when the temp is back down to 180F and the t-stat closes .
229F is NOT overheating, 225F IS overheating, which is why I asked what you mean by "overheating".
The usually cause of T-stat failure is a piece of rubber gasket from the cheap parts gets stuck in the t-stat valve holding it open so that the engine does not get to 180F in a timely fashion and at highway speeds igets below 180F.
Please explain the physics behind your shouted response. How can it cause overheating when its job is to keep the coolant hot?
The t-stat cannot cause overheating, unless something interferes with physics and the wax inside doesn't melt at 180F.
The t-stat opens at 180F, the fan turns on at about 219F (or when the AC compressor is on it is always on) then turns off when the temp is back down to 180F and the t-stat closes .
229F is NOT overheating, 225F IS overheating, which is why I asked what you mean by "overheating".
The usually cause of T-stat failure is a piece of rubber gasket from the cheap parts gets stuck in the t-stat valve holding it open so that the engine does not get to 180F in a timely fashion and at highway speeds igets below 180F.
Please explain the physics behind your shouted response. How can it cause overheating when its job is to keep the coolant hot?
(Me raising my hand) professor DonBrew sir I'm still very confused how is 229 not overheating but 225 is?
Well I jumped the gun and went out and bought a new thermostat. And now I'm worried about air in the system because all that I've read is you have to turn the heater on which with my car is impossible because the blend door is broke and so is the shaft part that the actuator would turn.
07-28-2023 | 07:05 AM
#14
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Joined: 10-13-2011
Posts: 37,828
From: Welland,Ont Canada
07-28-2023 | 08:16 AM
#15
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Joined: 01-23-2009
Posts: 25,339
From: Fredericksburg,VA
Fat fingers meant 220F.
Turning the heat on is a left over thing from the 60's when the heat control was a valve in the coolant hose. The HHR heater core is always hot.
If you got something other than ACDelco 131-158 it will probably fail open in short order. There are a lot that "fit" or "like" or "replaces" they all ha a rubber gasket that falls off and jams the valve open.
Turning the heat on is a left over thing from the 60's when the heat control was a valve in the coolant hose. The HHR heater core is always hot.
If you got something other than ACDelco 131-158 it will probably fail open in short order. There are a lot that "fit" or "like" or "replaces" they all ha a rubber gasket that falls off and jams the valve open.
07-28-2023 | 12:07 PM
#16
Senior Member
Joined: 12-05-2014
Posts: 2,683
From: Northern Ohio
Most of the cases of mild overheating that I've encountered, including mine, were due to air in the system. But yes, thermostat that doesn't fully open can cause overheating.
Both my 2.2 LS and 2.0 SS hover very close to 190F, even in hot wether. Both cars needed some effort and then patience to get rid of the last bit of air. Both of them have made excursions into the 210's, and both were cure with obsessively getting rid of the air. Keep in mind that there might be a bit of outgassing of the coolant. Gasses are soluble in liquids to various degrees, The last little bit of air, or maybe more precisely, gas, is expelled into the coolandt recovery tank, and replaced with tank contents, due to the heating and cooling from drive cycles. So any time the pressure cap has been off, keep and eye on the coolant recover tank for awhile.
Both my 2.2 LS and 2.0 SS hover very close to 190F, even in hot wether. Both cars needed some effort and then patience to get rid of the last bit of air. Both of them have made excursions into the 210's, and both were cure with obsessively getting rid of the air. Keep in mind that there might be a bit of outgassing of the coolant. Gasses are soluble in liquids to various degrees, The last little bit of air, or maybe more precisely, gas, is expelled into the coolandt recovery tank, and replaced with tank contents, due to the heating and cooling from drive cycles. So any time the pressure cap has been off, keep and eye on the coolant recover tank for awhile.
07-30-2023 | 10:55 AM
#17
Thread Starter
Member
Joined: 03-01-2022
Posts: 60
From: Portland Oregon
Ok so after all my trouble.......this could have been avoided it I had just did the proper diagnosis. I am sooooo stupid..... Long story short. The fan blades that broke, put small holes into the radiator that was the issue.
07-31-2023 | 07:41 AM
#20
Platinum Member
Joined: 12-06-2009
Posts: 11,432
From: Alabama
Not that it can’t. It’s the fact that no one has seen a HHR thermostat stuck in the closed position. Or that we’ve ever heard of on this site.
HHR thermostat failures are almost always because of the rubber gasket tearing loose and jamming the stat open.
HHR thermostat failures are almost always because of the rubber gasket tearing loose and jamming the stat open.
Last edited by firemangeorge; 07-31-2023 at 08:33 AM.