Car temp is getting over 245° an the dash temp gauge isnot moving - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

DCC1464 · 06-23-2017, 09:37 PM

So its been pretty hot here this week (read 120°) and my car coolant on my DIC is reading up to ~250°, and my dash temp gauge is staying in the same location (a little cooler/left of the center mark). So im not sure what to look at with my dic reporting a range of values (170-245) and the dash gauge doesnt move.

Anyone got any ideas where to start, normally i change the t-stat but not sure what the ls3 uses for the dash signal.

Crash76 · 06-23-2017, 10:58 PM

Can try changing the water temp sensor... easy to do

Lndryguru · 06-23-2017, 11:22 PM

ouch to me thats pretty hot on water temp, i live in vegas been brutal here this week too, i drove my car from la to vegas last sat outside temp were say 110 my water temp didnt get over 203

Avenging Orange · 06-24-2017, 07:54 AM

Have you checked coolant level?

ndtguy · 06-24-2017, 09:52 AM

Quote:

Originally Posted by Lndryguru

ouch to me thats pretty hot on water temp, i live in vegas been brutal here this week too, i drove my car from la to vegas last sat outside temp were say 110 my water temp didnt get over 203

Like the poster above, I'm in Vegas and haven't seen above 200 on the highway. In town stop and go, highest has been 208.

Olddudesrule · 06-24-2017, 01:47 PM

I'm in the Phoenix area as well, and routinely see coolant temps at around 195-208 at this time of the year, while oil temps climb routinely to 225-230 in normal driving. You're S/C'ed, so that certainly has something to do with higher temps. As stated, I would check the coolant levels first.

DCC1464 · 06-24-2017, 01:56 PM

my coolant level is fine and my ECU is reporting my coolant temps, my big concern right now is why my dash is not reading my temp? the overheating is most likely related but gota find what reports to the dash temp gauge. as you can see in the pictures my dash temp doesnt change. not sure what would cause this issue

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Synner · 06-24-2017, 03:32 PM

Go by your DIC. The temp gauge on modern GM cars are glorified idiot lights. There's, cold, up to temp, and overheated. Hitting 240 i would evaluate your antifreeze to water ratio or look at an upgrade.

jrhagen · 06-24-2017, 03:47 PM

My temp gauge hasn't moved, once up to operating temp, in the almost 5 years I have owned the car. Somewhere between 1/4 and 1/2 like yours. I set the DIC to coolant temp every time I start the car.

DCC1464 · 06-24-2017, 04:03 PM

I never really looked at that gauge (i have a coolant temp alarm set up at 230) so when my alarm went off i started too pay attention to it and noticed that. Guess ill start with flushing and refilling my coolant, and go from there

GONIF · 06-24-2017, 05:13 PM

Quote:

Originally Posted by DCC1464

So its been pretty hot here this week (read 120°) and my car coolant on my DIC is reading up to ~250°, and my dash temp gauge is staying in the same location (a little cooler/left of the center mark). So im not sure what to look at with my dic reporting a range of values (170-245) and the dash gauge doesnt move.

Anyone got any ideas where to start, normally i change the t-stat but not sure what the ls3 uses for the dash signal.

Your damn right it is hotter than hell here in Phoenix. My DIC ( oil temp ) goes up to 225 and my coolant temp gauge is just under half. Been that way every summer on my car. I would not change the T stat to a cooler one , it won't help. I always change my Dexcool and flush out my cooling systems ever 2 years . Do not use tap water , use distilled water the Phoenix city water is pure garbage . If you try Evans waterless coolant it should drop your temps by 15 or 20 degrees , I use it in my modified 73 Vette and it works great . FYI , I have found the best oil is Mobil 1 Euro formula 0-40 , it is loaded with zddp .

Russell James · 06-24-2017, 06:01 PM

Here is my total cooling system refresh approach...

Drain it...give to place that can recycle it.

Buy some fresh Dexcool. Mix it yourself, don't buy the premix stuff.

If in a hot climate 60-65% Distilled water. 70% if in scorching hot desert type climate.

Replace thermostat and radiator cap...OE spec, GM parts.

When refilling, really burp those air pocket out. Raise front end a bit, fill, have a helper hold the engine RPMS at 1500-2000 while you continue to fill. Keep rad cap off for about 10 mins during this raised idle/burping/filling.

When people just fill and let idle is when air pockets get stuck in there, gotta get that rpm up and flow up with the cap off while topping off. You'll see when the stat opens, all of the sudden it'll be rushing like crazing in the rad.

Then cap on, let it get nice and warm and watch the fans to make sure they are coming on high. High fan mode in these cars is significant and obvious. If you don't hear the fans blasting, check fuse.

Peek in at the radiator front, make sure bugs/debris haven't built up.

If S/C, make sure that system is topped off, similar percent distilled water. And make sure it's pump is working.

Too high a temp...could be too high a percent Dexcool, blown fan fuse, air pocket, thermostat, rad cap.... when one is being a bugger and getting hot.... I just go through all that stuff. Especially important in hot climates to get that water percent right.

Jrichards73 · 06-24-2017, 08:32 PM

I take the hose off of the driver side coolant crossover pipe when I am filling.

Kybourbon · 06-25-2017, 01:26 AM

Mine is running warm here in Ky it's been hot here too nothing like that tho thank god! But on 90 degree days it gets better than 220 when setting still till the fans kick on and bring it down then it's back up. But when I did my cam install I done straight antifreeze no water. I need to fix that. Tomorrow Pull a gallon maybe or 2 would you think.?

06-23-2017, 09:37 PM	#1
DCC1464 COTW 5/27/13 Drives: '11 S/C SS/RS CGM Join Date: Dec 2010 Location: Phoenix, AZ Posts: 755 View My Garage	Car temp is getting over 245° an the dash temp gauge isnot moving So its been pretty hot here this week (read 120°) and my car coolant on my DIC is reading up to ~250°, and my dash temp gauge is staying in the same location (a little cooler/left of the center mark). So im not sure what to look at with my dic reporting a range of values (170-245) and the dash gauge doesnt move. Anyone got any ideas where to start, normally i change the t-stat but not sure what the ls3 uses for the dash signal. __________________ 622RWHP/512FTLBS on 91 octane 2.9l Whipple 4" pulley. Vengance VRSP3 cam. Lots of BMR & AAC. Body work by Gary's Customz. Nic D tuned My build thread Last edited by DCC1464; 06-24-2017 at 02:42 AM.

06-23-2017, 11:22 PM	#3
Lndryguru Drives: 2013 Camaro 2SS/RS Join Date: Apr 2014 Location: Las Vegas, NV Posts: 226	ouch to me thats pretty hot on water temp, i live in vegas been brutal here this week too, i drove my car from la to vegas last sat outside temp were say 110 my water temp didnt get over 203 __________________ 2013 Camaro SS Victory Red/Black Stripes

06-24-2017, 07:54 AM	#4
Avenging Orange Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010 Location: Clermont, IN Posts: 3,297	Have you checked coolant level? __________________ 2010 Inferno Orange 2SS/RS M6 Black Leather, Sun Roof, OBX Headers, Borla touring axle back, Cold Air Inductions CAI , non synthetic fluids, BMR total bushing upgrade/1" lowering springs, DSE 32mm rear sway bar. GM fe4 shocks/struts/LCA's, AAM 3.91 diff, Vertini RFS1.8 20x9 +30. Conti ExtremeContact Sport 275/35/20. sjm autoprod ABL dash kit. Mike Norris tuned 413/419. Avenging Orange: 43 years of not buying into the Hype........and damn proud of it!! https://youtu.be/9JD9it6SmB8 https://youtu.be/xmelTlEzI34 KICKING CANCERS ASS SINCE 2015!!

06-24-2017, 01:47 PM	#6
Olddudesrule Resident nomad Drives: 2014 Summit White 1SS/1LE Join Date: Nov 2015 Location: Gilbert, AZ Posts: 1,765	I'm in the Phoenix area as well, and routinely see coolant temps at around 195-208 at this time of the year, while oil temps climb routinely to 225-230 in normal driving. You're S/C'ed, so that certainly has something to do with higher temps. As stated, I would check the coolant levels first. __________________ Sold: 2007 Z06 2002 Viper GTS/ACR 2003 Z06 1965 FFR Cobra 2012 Nissan 370Z ADM LSA Stage II, Roto-Fab CAI, Kooks LTH/HFC's, Phastek CC, ported TB, Mishimoto radiator and oil cooler, BC Racing ER Series CO's, JPSS 32mm Black Magic rear bar, JPSS front inserts, R1 Concepts Premier slotted rotors/Goodrich SS lines, Schroth ASM harness, MGW flatstick, Brey-Krause HB, Tuned by NicD, at Cordes Performance Racing.

06-24-2017, 01:56 PM	#7
DCC1464 COTW 5/27/13 Drives: '11 S/C SS/RS CGM Join Date: Dec 2010 Location: Phoenix, AZ Posts: 755 View My Garage	my coolant level is fine and my ECU is reporting my coolant temps, my big concern right now is why my dash is not reading my temp? the overheating is most likely related but gota find what reports to the dash temp gauge. as you can see in the pictures my dash temp doesnt change. not sure what would cause this issue at temp really hot __________________ 622RWHP/512FTLBS on 91 octane 2.9l Whipple 4" pulley. Vengance VRSP3 cam. Lots of BMR & AAC. Body work by Gary's Customz. Nic D tuned My build thread Last edited by DCC1464; 06-24-2017 at 01:57 PM. Reason: sorry for the large pictures, dont know how to resize 'em

06-23-2017, 10:58 PM	#2
Crash76 Team 913 Drives: '14 ZL1, '15 Jeep GC, ‘22 Ram 2500 Join Date: Apr 2015 Location: USA, Central CA Posts: 1,119	Can try changing the water temp sensor... easy to do

06-24-2017, 03:32 PM	#8
Synner Drives: cars Join Date: May 2011 Location: Oversneeze Posts: 4,544	Go by your DIC. The temp gauge on modern GM cars are glorified idiot lights. There's, cold, up to temp, and overheated. Hitting 240 i would evaluate your antifreeze to water ratio or look at an upgrade.

06-24-2017, 03:47 PM	#9
jrhagen Banned Drives: Camaro Join Date: Mar 2013 Location: USA Posts: 2,701	My temp gauge hasn't moved, once up to operating temp, in the almost 5 years I have owned the car. Somewhere between 1/4 and 1/2 like yours. I set the DIC to coolant temp every time I start the car.

06-24-2017, 04:03 PM	#10
DCC1464 COTW 5/27/13 Drives: '11 S/C SS/RS CGM Join Date: Dec 2010 Location: Phoenix, AZ Posts: 755 View My Garage	I never really looked at that gauge (i have a coolant temp alarm set up at 230) so when my alarm went off i started too pay attention to it and noticed that. Guess ill start with flushing and refilling my coolant, and go from there __________________ 622RWHP/512FTLBS on 91 octane 2.9l Whipple 4" pulley. Vengance VRSP3 cam. Lots of BMR & AAC. Body work by Gary's Customz. Nic D tuned My build thread

06-24-2017, 06:01 PM	#12
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	Here is my total cooling system refresh approach... Drain it...give to place that can recycle it. Buy some fresh Dexcool. Mix it yourself, don't buy the premix stuff. If in a hot climate 60-65% Distilled water. 70% if in scorching hot desert type climate. Replace thermostat and radiator cap...OE spec, GM parts. When refilling, really burp those air pocket out. Raise front end a bit, fill, have a helper hold the engine RPMS at 1500-2000 while you continue to fill. Keep rad cap off for about 10 mins during this raised idle/burping/filling. When people just fill and let idle is when air pockets get stuck in there, gotta get that rpm up and flow up with the cap off while topping off. You'll see when the stat opens, all of the sudden it'll be rushing like crazing in the rad. Then cap on, let it get nice and warm and watch the fans to make sure they are coming on high. High fan mode in these cars is significant and obvious. If you don't hear the fans blasting, check fuse. Peek in at the radiator front, make sure bugs/debris haven't built up. If S/C, make sure that system is topped off, similar percent distilled water. And make sure it's pump is working. Too high a temp...could be too high a percent Dexcool, blown fan fuse, air pocket, thermostat, rad cap.... when one is being a bugger and getting hot.... I just go through all that stuff. Especially important in hot climates to get that water percent right.

06-24-2017, 08:32 PM	#13
Jrichards73 Drives: 2011 2SS/RS Victory Red Join Date: Aug 2011 Location: Virginia Posts: 921	I take the hose off of the driver side coolant crossover pipe when I am filling. __________________ Updates: BTR Stage 2 VVT Cam Kit w/Smith Brothers Trunnions, Fluidampr, RX catch can, B&M Trans pan mod, Kooks Black Headers, Borla S-tunes, Eibach Multi-Pro-R2 coilovers and Swaybars, BMR Full Bushing kit with Toe and Trailing arms, RB Rotors w/EBC Pads, GForce 1400 Axles (now on order). AVH-X5800BHS in Scosche GM5201AB.

06-25-2017, 01:26 AM	#14
Kybourbon Drives: 2015 emerald green ss L99 Join Date: Apr 2017 Location: Kentucky Posts: 26	Mine is running warm here in Ky it's been hot here too nothing like that tho thank god! But on 90 degree days it gets better than 220 when setting still till the fans kick on and bring it down then it's back up. But when I did my cam install I done straight antifreeze no water. I need to fix that. Tomorrow Pull a gallon maybe or 2 would you think.?