Radiator question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CHEVY & GMC FOREVER · 05-23-2005, 07:54 PM

Okay today the water in the radiator was low and the engine was running hot so I decided that the motor is ready for anti-freeze so i emptied the radiator and put anti-freeze in and started it, well it is doing the same thing getting a little hot ten when you drive it gets hotter.... any ideas??? P.S. I just put a new temperature control valve on it.

Longhorn Man · 05-23-2005, 09:12 PM

What is a temp control valve? Are you talkin A/C stuff?

Did you purge the system? I hear the air pocket deal tossed around here 10 times a week, but this is a case where it actually sounds like that to me.

You didn't put straight antifreeze in there did you? That'll heat up your motor alone.

Thermostat? Is it new..old....rusty and nasty?

If it was low...where did it go?

CHEVY & GMC FOREVER · 05-23-2005, 09:49 PM

Of course i did not put straight antifreeze in it, I mean the heater control valve or what the little silver thing that has a hose from the water pump and another one to the water header on the manifold, and another little one, on the passenger side in the engine bay, I think maybe I'll try water tommorow instead of the mix, and I'll give you an update, any other things you think of are welcomed, I haven't worked on one of these trucks like this in a long time and probably forgot alot.

P.S new thermostat.

1978steven · 05-23-2005, 10:34 PM

I think you are talking about the valve between the water pump and heater core. All it does is shut off the coolant into the heater core, for summer driving!!

I agree with Longhorn Man, you more than likely have air in the cooling system, and need to purge it out.

Where did all that coolant go? Does the system have any leaks (hoses, heater core, freeze plugs, etc.)??

Where are you located? I know here in Texas is been hot and only getting hotter, just this past week the upper 90's. I just swapped out my 190 thermostat for a 160 to help out.

**Stocker** · 05-24-2005, 08:44 AM

Hmmm... Do you have a fan shroud? What kind of fan? Sealed system with overflow tank?

CHEVY & GMC FOREVER · 05-25-2005, 10:57 PM

all stock stuff.

**Stocker** · 05-26-2005, 08:40 AM

Then you have a clutch fan. Maybe it went south. How does it feel when you rotate it by hand?

CHEVY & GMC FOREVER · 05-27-2005, 11:35 PM

It is very easy to turn either way.

CHEVY & GMC FOREVER · 05-27-2005, 11:49 PM

You know the temperature does not seem to affect the motor at all, cause yesterday I was drivin' around and the temp gauge was a little passed to half-way mark, so I was going to make a left turn....... I stomped the throttle and she took off tires screamin' (which I did not think it had enough gogo to do) and then the ass end started comin' round and the rear tire (no posi) started really skidding and the motor sped up A LOT, sounded great!!!... after that the temp gauge was gettin' close to the red.

CHEVY & GMC FOREVER · 05-28-2005, 03:03 PM

Maximum Overdrive · 05-28-2005, 04:32 PM

If you are not leaking antifreeze anywhere you probably need to purge the system of air.

CHEVY & GMC FOREVER · 05-31-2005, 09:13 PM

I found the problem, a bad temp. sending unit, I swaped it out and put the original one back in, then everything was normal.

05-23-2005, 07:54 PM	#1
CHEVY & GMC FOREVER Registered User Join Date: Nov 2004 Location: New Lenox,IL Posts: 306	Radiator question Okay today the water in the radiator was low and the engine was running hot so I decided that the motor is ready for anti-freeze so i emptied the radiator and put anti-freeze in and started it, well it is doing the same thing getting a little hot ten when you drive it gets hotter.... any ideas??? P.S. I just put a new temperature control valve on it. __________________ 1985 Chevrolet C-30 454 1-TON Dooley 1969 CHEVROLET CST-10 PICK-UP Good memories 1999 Chevrolet Z71 Ext. cab 5.7L Good Memories With a quart of oil, and a gallon of gas, she won't let no other car pass!!!. & FOREVER

05-23-2005, 09:49 PM	#3
CHEVY & GMC FOREVER Registered User Join Date: Nov 2004 Location: New Lenox,IL Posts: 306	Of course i did not put straight antifreeze in it, I mean the heater control valve or what the little silver thing that has a hose from the water pump and another one to the water header on the manifold, and another little one, on the passenger side in the engine bay, I think maybe I'll try water tommorow instead of the mix, and I'll give you an update, any other things you think of are welcomed, I haven't worked on one of these trucks like this in a long time and probably forgot alot. P.S new thermostat. __________________ 1985 Chevrolet C-30 454 1-TON Dooley 1969 CHEVROLET CST-10 PICK-UP Good memories 1999 Chevrolet Z71 Ext. cab 5.7L Good Memories With a quart of oil, and a gallon of gas, she won't let no other car pass!!!. & FOREVER Last edited by CHEVY & GMC FOREVER; 05-23-2005 at 09:49 PM.

05-23-2005, 10:34 PM	#4
1978steven Registered User Join Date: Oct 2004 Location: Currently New Windsor, NY but Texas is home Posts: 332	I think you are talking about the valve between the water pump and heater core. All it does is shut off the coolant into the heater core, for summer driving!! I agree with Longhorn Man, you more than likely have air in the cooling system, and need to purge it out. Where did all that coolant go? Does the system have any leaks (hoses, heater core, freeze plugs, etc.)?? Where are you located? I know here in Texas is been hot and only getting hotter, just this past week the upper 90's. I just swapped out my 190 thermostat for a 160 to help out. __________________ 2002 Silverado 2500HD LB7 CCSB LT EFI Live by Rob at ATP, Edge CTS Insight DSP 5 control, S&B CAI, PPE boost valve, Pro Fab AIH, AirDog II 165, PPE WIF sensor delete plug, 5" stainless exhaust, Cognito braces & HD tie rods, H2's 315/70 R17 BFG's 2004 Tahoe LT 2006 Silverado Z71 LS 1971 Chevy C10

05-24-2005, 08:44 AM	#5
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,586	Hmmm... Do you have a fan shroud? What kind of fan? Sealed system with overflow tank? __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

05-25-2005, 10:57 PM	#6
CHEVY & GMC FOREVER Registered User Join Date: Nov 2004 Location: New Lenox,IL Posts: 306	all stock stuff. __________________ 1985 Chevrolet C-30 454 1-TON Dooley 1969 CHEVROLET CST-10 PICK-UP Good memories 1999 Chevrolet Z71 Ext. cab 5.7L Good Memories With a quart of oil, and a gallon of gas, she won't let no other car pass!!!. & FOREVER

05-23-2005, 09:12 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	What is a temp control valve? Are you talkin A/C stuff? Did you purge the system? I hear the air pocket deal tossed around here 10 times a week, but this is a case where it actually sounds like that to me. You didn't put straight antifreeze in there did you? That'll heat up your motor alone. Thermostat? Is it new..old....rusty and nasty? If it was low...where did it go?

05-26-2005, 08:40 AM	#7
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,586	Then you have a clutch fan. Maybe it went south. How does it feel when you rotate it by hand? __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

05-27-2005, 11:35 PM	#8
CHEVY & GMC FOREVER Registered User Join Date: Nov 2004 Location: New Lenox,IL Posts: 306	It is very easy to turn either way. __________________ 1985 Chevrolet C-30 454 1-TON Dooley 1969 CHEVROLET CST-10 PICK-UP Good memories 1999 Chevrolet Z71 Ext. cab 5.7L Good Memories With a quart of oil, and a gallon of gas, she won't let no other car pass!!!. & FOREVER

05-27-2005, 11:49 PM	#9
CHEVY & GMC FOREVER Registered User Join Date: Nov 2004 Location: New Lenox,IL Posts: 306	You know the temperature does not seem to affect the motor at all, cause yesterday I was drivin' around and the temp gauge was a little passed to half-way mark, so I was going to make a left turn....... I stomped the throttle and she took off tires screamin' (which I did not think it had enough gogo to do) and then the ass end started comin' round and the rear tire (no posi) started really skidding and the motor sped up A LOT, sounded great!!!... after that the temp gauge was gettin' close to the red. __________________ 1985 Chevrolet C-30 454 1-TON Dooley 1969 CHEVROLET CST-10 PICK-UP Good memories 1999 Chevrolet Z71 Ext. cab 5.7L Good Memories With a quart of oil, and a gallon of gas, she won't let no other car pass!!!. & FOREVER

05-28-2005, 03:03 PM	#10
CHEVY & GMC FOREVER Registered User Join Date: Nov 2004 Location: New Lenox,IL Posts: 306	__________________ 1985 Chevrolet C-30 454 1-TON Dooley 1969 CHEVROLET CST-10 PICK-UP Good memories 1999 Chevrolet Z71 Ext. cab 5.7L Good Memories With a quart of oil, and a gallon of gas, she won't let no other car pass!!!. & FOREVER

05-28-2005, 04:32 PM	#11
Maximum Overdrive December 21, 2012 Join Date: Apr 2000 Location: Black Eagle, Montana Posts: 1,634	If you are not leaking antifreeze anywhere you probably need to purge the system of air. __________________ *"!Ama Sua, Ama Kjella, Ama Lllulla!"*

05-31-2005, 09:13 PM	#12
CHEVY & GMC FOREVER Registered User Join Date: Nov 2004 Location: New Lenox,IL Posts: 306	I found the problem, a bad temp. sending unit, I swaped it out and put the original one back in, then everything was normal. __________________ 1985 Chevrolet C-30 454 1-TON Dooley 1969 CHEVROLET CST-10 PICK-UP Good memories 1999 Chevrolet Z71 Ext. cab 5.7L Good Memories With a quart of oil, and a gallon of gas, she won't let no other car pass!!!. & FOREVER



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