why is my truck getting so hot? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

odie82 · 05-09-2004, 06:46 PM

when I'm driving my truck on city streets when I come to a stop at a light or stop sigh my temp. shoots up to 200-210,one time it did that the motor shut down and I had to wait till the motor cooled down to get it to restart.the gauge has always pointed at 180 driving or at idle untill just lately.

has a new 180 thermostate,fresh coolant,has a electric fan,

**swervin ervin** · 05-09-2004, 06:53 PM

What kind of electric fan? Meaning size and maker. You fan may be too small to keep it cool.

ocbaud · 05-09-2004, 08:13 PM

i think my electric fans keep my engine to cool

Blue82Chev · 05-09-2004, 08:18 PM

Does your electric fan have a thermostat? If it does, some of them use a cheesy sensor that gets pushed into the radiator fins. These don't always like to measure the correct temp and can turn the fan on when the engine is hotter than it should be. You may even have to simply adjust what temp. the fans kick in at.

odie82 · 05-09-2004, 10:47 PM

my fan I have is wired to a toggle switch and I always leave it on,last summer I had no problem with the truck getting hot,I dont know what would have caused this.

chicogixr · 05-09-2004, 11:01 PM

how old is your water pump?

**swervin ervin** · 05-09-2004, 11:24 PM

You still never answered my question. What brand is it and how big is it.

If it's a cheapo, it may be laying down on you, especially since you just said you leave it on all the time. These things are not designed to be left on all the time. They are electric motors and will burn out.

muscletruck · 05-11-2004, 04:44 AM

ill go with water pump... if its new thermostat (could be a bad one though)... i have heard of putting two small hole in the thermostat just to keep the flow through the radiator.... but doesnt this defeat the purpose of thermostat? meh...id try the pump

TwinTurbo · 05-11-2004, 06:25 AM

the small holes are not only for flow (there's a bypass on the block, pass side mounting flange for water pump), it's for removing steam bubbles trapped under the thermostat. check your radiator, it may be clogged up.

muscletruck · 05-11-2004, 08:19 AM

learn something new every day...

05-09-2004, 06:46 PM	#1
odie82 Registered User Join Date: Jan 2004 Location: minnesota Posts: 349	why is my truck getting so hot? when I'm driving my truck on city streets when I come to a stop at a light or stop sigh my temp. shoots up to 200-210,one time it did that the motor shut down and I had to wait till the motor cooled down to get it to restart.the gauge has always pointed at 180 driving or at idle untill just lately. has a new 180 thermostate,fresh coolant,has a electric fan, __________________ 1982 chevy C-10, blue 2wd shortbox 17x9 cragar ss rims, 350V8-th400 2003 suzuki gsxr 1000-hit 175mph!!! yeah it's fast-no you can't ride it

05-09-2004, 06:53 PM	#2
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	What kind of electric fan? Meaning size and maker. You fan may be too small to keep it cool. __________________ Mike 1985 Chevy C-10

05-09-2004, 08:18 PM	#4
Blue82Chev Murph Join Date: Jan 2004 Location: Central Minnesota Posts: 206	Does your electric fan have a thermostat? If it does, some of them use a cheesy sensor that gets pushed into the radiator fins. These don't always like to measure the correct temp and can turn the fan on when the engine is hotter than it should be. You may even have to simply adjust what temp. the fans kick in at. __________________ Mike Vehicles: 1982 C20 2003 GMC Sierra

05-09-2004, 10:47 PM	#5
odie82 Registered User Join Date: Jan 2004 Location: minnesota Posts: 349	my fan I have is wired to a toggle switch and I always leave it on,last summer I had no problem with the truck getting hot,I dont know what would have caused this. __________________ 1982 chevy C-10, blue 2wd shortbox 17x9 cragar ss rims, 350V8-th400 2003 suzuki gsxr 1000-hit 175mph!!! yeah it's fast-no you can't ride it

05-09-2004, 11:01 PM	#6
chicogixr Registered User Join Date: Jan 2004 Location: chico,ca Posts: 52	how old is your water pump? __________________ Semper Fi seafoam green 79 K10 stepside with a 6" lift, 33" baja claws, billet interior, autometer gauges, 350/t350

05-09-2004, 08:13 PM	#3
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	i think my electric fans keep my engine to cool

05-09-2004, 11:24 PM	#7
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	You still never answered my question. What brand is it and how big is it. If it's a cheapo, it may be laying down on you, especially since you just said you leave it on all the time. These things are not designed to be left on all the time. They are electric motors and will burn out.

05-11-2004, 04:44 AM	#8
muscletruck Registered User Join Date: Jan 2002 Location: anahiem,ca,usa Posts: 201	hmm ill go with water pump... if its new thermostat (could be a bad one though)... i have heard of putting two small hole in the thermostat just to keep the flow through the radiator.... but doesnt this defeat the purpose of thermostat? meh...id try the pump __________________ i think i found me truck! 78 Crew Cab Dually 454/TH400, Dual Flows, Edelbrock Intake, Cam, Lifters, Billet Grill, K&N Airfilter, Grant Steering Wheel, A/C, soon to be power windows and locks, lots of plans for this... ....gas prices go down please

05-11-2004, 06:25 AM	#9
TwinTurbo Registered User Join Date: Sep 2003 Location: The Netherlands Posts: 994	the small holes are not only for flow (there's a bypass on the block, pass side mounting flange for water pump), it's for removing steam bubbles trapped under the thermostat. check your radiator, it may be clogged up.

05-11-2004, 08:19 AM	#10
muscletruck Registered User Join Date: Jan 2002 Location: anahiem,ca,usa Posts: 201	oh learn something new every day... __________________ i think i found me truck! 78 Crew Cab Dually 454/TH400, Dual Flows, Edelbrock Intake, Cam, Lifters, Billet Grill, K&N Airfilter, Grant Steering Wheel, A/C, soon to be power windows and locks, lots of plans for this... ....gas prices go down please

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