V6 Engine over-cooling? What is the "normal" temperature to run at? - Chevy Impala Forums
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post #1 of (permalink) Old 01-21-2015 Thread Starter
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V6 Engine over-cooling? What is the "normal" temperature to run at?

Is anyone else (during the winter) seeing their engine coolant temperature max out at around 177F or so when driving?

I've seen mine only go to 179F or 181F briefly while driving (even on a 40+ mile trip), but not higher - outdoor temps usually are around 40F or lower this time of year.

After a short drive of about 5 miles, I pulled into the garage (unheated, around 47F inside according to the ambient temp sensor) and let the car idle. The temperature readout on the DIC slowly inched its way upward and got to 192F after about 5 minutes idling before I shut down, which is closer to what I believe should be the normal engine operating temp.

My 2013 didn't have a DIC readout for coolant temperature so I have nothing to compare it to, but if the engine isn't reaching its "normal" temperature while driving that might be why my 2015 MPG is lower than my old 2013.

Does anyone else see this behavior? What is the normal operating temp for the 3.6L? Should i block off part of the radiator grille or just let it go until warmer weather and see what happens?

2015 Crystal Red Impala LTZ V6
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post #2 of (permalink) Old 01-21-2015
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Sounds normal? I have some pictures of the dash and it's below 1/2 on gauge.

182F stands out in my mind at the gas station when I'm flipping through the DIC.

Don't worry about it... You should be throwing lots of interior heat anyways and be nice and toasty.
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post #3 of (permalink) Old 01-21-2015
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The car comes with a 180 degree thermostat. So those temps are normal for a car in motion with lots of airflow through the radiator. At idle with no airflow other than what the fan is pulling could cause the temp to rise a little bit above that.

But 180 is the temp the engine designed to run at. Trying to make it run hotter constantly would most likely be a bad idea.

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post #4 of (permalink) Old 01-22-2015 Thread Starter
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Thanks for the info. I suppose with the 11.5:1 compression, the engine is designed to run cooler.

The last car I had with a DIC readout for coolant temperature was a 2.2L Cobalt and it ran at a consistent 189F, but that was an entirely different animal (port-injected 4-banger with lower compression).

I'm pretty sure they used to list specs like these in the manuals of days past for people who replaced their own parts... sometimes even recommending different thermostats for Canada versus the USA due to climate differences.

I suppose I should spring for the 2015 Impala Helm manuals when they become available next month.

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post #5 of (permalink) Old 11-06-2015
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I love in miami Florida where the temp outaide is usually high and the air flow to my radiator is fairly limited and i have seen my coolant temp as high as 202 is this normal or should i have more air flow so it cold more?
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202F is not anything to worry about. Even in the winter, my coolant can reach temps over 200F.

According to the stock tune file for my 2012, it looks like the cooling fan doesn't even kick on until the coolant reaches 210F (44% fan) - unless using A/C - when A/C is on, at least one of the fans is always running.

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post #7 of (permalink) Old 11-06-2015
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Im very curious about how the turn lamps on my impala are suppose to work. Are they suppose to be steadily on at any point or is it only for signaling the turn? I did start a post about this but i looked through all 39 pages of the 9th gen but see no answers. It's driving me crazy. I have the impression that they are suppose to be on constantly while the car is turned on and in motion. Am i right or wrong?
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I'm not sure about the 9th gens, but typically, that light is on with the headlights or parking lights. It wouldn't normally be on with the Daytime Running Lights though... Does that help?

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post #9 of (permalink) Old 11-06-2015
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It helps me alittle bit because when i bought the car i can swear i remember them being on. I have had the car now for 6 days and those lights don't seem to turn on at all whether night or day. They only turn on when i remote start the car but, when i get in it and confirm the ignition they turn off. I have 14 1ltz. Maybe I'll will need to post pictures to get better help. I appreciate your time!
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post #10 of (permalink) Old 11-06-2015
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Hopefully, someone that owns a 9th gen will chime in - I'm just basing my info on the way my 8th gen (and previous cars) worked. Maybe the 9th gens operate differently.... I'm sure a 9th gen owner will chime in soon enough with more concrete info!

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post #11 of (permalink) Old 11-06-2015
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I asked this same thing a month? ago, since I thought that the thermostats have been 195 for a few years, but I guess not now. Mine sits at 181 after it stabilizes. There IS something weird abut the HVAC, and seems to need a higher temp for the defrost as opposed to the vent to get the same warm air. Plus, when you reduce it one or two degrees(NOT in "AUTO" mode), it blows cold air for a little (defrost).

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post #12 of (permalink) Old 11-08-2015
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Last night, while in the 30's, I had been driving around for hours. It sat around 175 which seems a little low; to me anyway. I still have to adjust the temp control from 78 down to 66 over time to stay comfortable.

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it will run at 179

mine swings right through 179 210 sniffing somebody's tailpipe back down to 186 in park 89F to 95F
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2018 temp gauge

my 2018 temp gauge never moves beyond 1/3, mark
never ever gets to 1/2, so ;looked at temp in the DIC.
avg 180, up hill ,ac on, 115 out side, temp got to 205, but gauge still shows 1/3,
its now at the dealer, along with pics of gauge and DIC readout,
suspect temp sender?
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Quote:
Originally Posted by olddog View Post
my 2018 temp gauge never moves beyond 1/3, mark
never ever gets to 1/2, so ;looked at temp in the DIC.
avg 180, up hill ,ac on, 115 out side, temp got to 205, but gauge still shows 1/3,
its now at the dealer, along with pics of gauge and DIC readout,
suspect temp sender?
Not sure about the sender. As far as I know, there is only one temp sensor for the LFX 3.6L V6. So the same source data supplies both the DIC and the gauge.

I tried to find a detailed explanation for the gauge operation, but struck out.

Doug

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_

If your socket set is all the same brand, you might be a city slicker.

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Last edited by plano-doug; 21 Hours Ago at 08:27 PM.
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