Coolant Temps normal or Not ??
Thread Starter
Melting Slicks
Joined: Sep 2007
Posts: 2,138
Likes: 139
From: Port St Lucie Florida
Coolant Temps normal or Not ??
I have a forged LS6 347 procharged and today driving in the city in 90 degree fla heat car got up to 230 degrees driving in stop and go trafic under 40-45 mph. Once I drive to about 50-55 The coolant will com back down pretty fast. Is all this normal or not? Driving on the hwy stays around 200-210. Oil temps in the city get to 235 degrees. Thoughts, advice thanks. Its an automatic with tranny cooler.
Also I recently cleaned any debree front and behind radiator.
Also I do hear a fan can't tell if both fans are running or not when I turn the car off. How to tell if both fans are running?
Also I recently cleaned any debree front and behind radiator.
Also I do hear a fan can't tell if both fans are running or not when I turn the car off. How to tell if both fans are running?
Melting Slicks
Joined: Aug 2013
Posts: 2,491
Likes: 315
St. Jude Donor '15-'16-'17-'18-'19-'20-'21-'22
You can turn on the AC in traffic to cool down motor. On highway, temp should be 190-200.
Factory temp settings are low speed on at 226 degrees and off at 219 degrees. High speed on at 235 degrees and revert to low speed at 226 degrees. As stated both fans run at low speed and high speed and fans are commanded off by the PCM when the vehicle speed exceeds 35mph.
You can force low speed operation at 185 degrees by turning on the AC. High speed operation with AC on is still 235 degrees.
Factory temp settings are low speed on at 226 degrees and off at 219 degrees. High speed on at 235 degrees and revert to low speed at 226 degrees. As stated both fans run at low speed and high speed and fans are commanded off by the PCM when the vehicle speed exceeds 35mph.
You can force low speed operation at 185 degrees by turning on the AC. High speed operation with AC on is still 235 degrees.
Drifting
Joined: Mar 2010
Posts: 1,628
Likes: 15
From: Seattle WA
You can turn on the AC in traffic to cool down motor. On highway, temp should be 190-200.
Factory temp settings are low speed on at 226 degrees and off at 219 degrees. High speed on at 235 degrees and revert to low speed at 226 degrees. As stated both fans run at low speed and high speed and fans are commanded off by the PCM when the vehicle speed exceeds 35mph.
You can force low speed operation at 185 degrees by turning on the AC. High speed operation with AC on is still 235 degrees.
Factory temp settings are low speed on at 226 degrees and off at 219 degrees. High speed on at 235 degrees and revert to low speed at 226 degrees. As stated both fans run at low speed and high speed and fans are commanded off by the PCM when the vehicle speed exceeds 35mph.
You can force low speed operation at 185 degrees by turning on the AC. High speed operation with AC on is still 235 degrees.
In any event, he's not overheating, and the temps come right back down when he gets up to speed or when the high speeds kick in at 235 (because he didn't say it gets above 230).
Not overheating, stop worrying about it, your fans and radiator are fine, go drive the car.
Thread Starter
Melting Slicks
Joined: Sep 2007
Posts: 2,138
Likes: 139
From: Port St Lucie Florida
Thanks trio's
I took the car out on the hwy maintaining speeds about 75-80 mph. Temps stayed at 199-200 with A/C on. oil temps where 225 As soon as I got back into the city. Temps go back up to 220-230. Stop lights 90 degree temps in Fla, its always driving 40 mph and under. Once I get to about 50 mph and higher coolant temps seem to be ok.
I took the car out on the hwy maintaining speeds about 75-80 mph. Temps stayed at 199-200 with A/C on. oil temps where 225 As soon as I got back into the city. Temps go back up to 220-230. Stop lights 90 degree temps in Fla, its always driving 40 mph and under. Once I get to about 50 mph and higher coolant temps seem to be ok.
Last edited by corvet786c; Sep 27, 2016 at 04:36 PM.
Race Director
Joined: Jan 2008
Posts: 16,028
Likes: 170
From: oregon
wouldn't do lap days with that cooling system but those temps are fine for street driving.
would absolutely get a larger radiator and dedicated oil cooler before you go racing
if your fans are stock in the tune having the AC on will force low speed operation regardless of mph
would absolutely get a larger radiator and dedicated oil cooler before you go racing
if your fans are stock in the tune having the AC on will force low speed operation regardless of mph
Last edited by racebum; Sep 28, 2016 at 08:33 PM.
