GT350 Coolant Temperature

[fastd]

I have a 2017 GT350.

I've noticed that my cylinder head temps are getting up to into the low 220s and brought it to Ford to check it out.

They say that up to 224 degrees is within spec; that seems high to me. Anyone else see these high temps just on normal street driving?

More details:
1. There are 2 cooling fans; Ford said that 1 fan comes on when the A/C is one; if the A/C is not running, then the other one comes on at 224 degrees.
2. I have actually been not using the A/C much; and I don't think I was using it when the temps climbed.
3. Going forward, I will ride around with the A/C on to see if that brings the coolant temp down!
4. Normal operating range on the street has been 198-205 with the A/C on I think. Haven't really noticed too much; especially coming out of the winter.
5. I only own the car since Sept 2017 so I haven't really driven it much in 80+ degrees (I'm in NC); and if I did, I bet I had the A/C on.

Thanks to all.

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[tdzee]

Note that most engine cooling systems use a 15 psi radiator pressure relief valve. At 15 psi, water can go up to abt 250 degF before vaporizing.

Their feedback sounds about right for today's higher temp, emission compliant engines. If it bothers you, I assume that you can reset the fan on temps with Forscan.

 

[fastd]

thanks tdzee.

I don't understand "rest the fan on temps with Forscan" though...what is Forscan? and what does "rest the fan on temps" mean?

 

[EFI]

Is this the first time you're driving this car in summer temps? If not, what was it like last summer?

Low 220s is not bad, that's mid teens coolant temp. Nothing wrong with that, and if you look in the tune the ECU is targeting to keep the engine around that temp.

Other than verifying the cooling system is working correctly (fans working, no water leaks, coolant is full) I would not worry.

 

[nastang87xx]

These engines are good with those types of temps. 280 coolant is where things are finally getting to the point where you MIGHT consider getting concerned. Might...

On autocross I routinely see 250. Meh. Tracking I actually see around there and sometimes not much worse because of good airflow/ambient temps. Run it. Remember Ford tested the 350 on multiple tracks around the country for 24 hours straight stopping only for fuel, tires, and brakes.

 

[fastd]

thanks for responses.

btw, the low 220s temps are the cylinder head temps. I put an obd ii in, and coolant temps were about 5 degrees cooler.

 

[nastang87xx]

thanks for responses.

btw, the low 220s temps are the cylinder head temps. I put an obd ii in, and coolant temps were about 5 degrees cooler.

Oh, that's perfectly normal. All good.

 

[fastd]

great; thank you!

 

[bellwilliam]

220 cylinder head temp means you aren't pushing the car !!

 

[fastd]

lol! it would seem so...need to up my game...going to VIR next week, just wanted to make sure everything is "cool"

 

[TheDeadCow]

I live in Arizona and have a '17GT350, no problems here. If you look for problems, you'll always find them

 

[GT_Dave]

One of the issues with the GT350 is that there are more operating conditions monitored than a normal street vehicle and new people coming to this car may not be accustomed to seeing these types of temperatures reported. Completely understandable. I am still a little bit put off by the differences I see driving during the cooler months and into the spring, then when the hot summer days arrive everything shows up 40 to 50 degrees warmer. Seems like every summer it is something I have to get used to.

 

[DrumReaper]

Just random question... would a cooler thermostat help with more power?

 

[nastang87xx]

Just random question... would a cooler thermostat help with more power?

I doubt it because charge temps are charge temps really in a simple NA application. I guess overall thermal soak with the heads and coolant passages could potentially affect timing but I would think you'd need to be in some serious danger zone for the engine to pull timing on an NA motor. Nowadays it seems like a computer won't pull timing unless it's in a state of "I need to save this engine from catastrophic failure" or with FI applications heat soaking the fawk out of itself. Best example I can think of is the C7Z and that shit storm.

 

[DrumReaper]

Ok thanks for the input bro.

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