Temp Gauge - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Claytona08 · 03-26-2014, 08:50 AM

Hey guys, I drained all the fluid out of my radiator because it was real dirty and brownish and the gasket was bad on the thermostat so I decided to replace the thermostat and put new fluid in the radiator. When I am driving the truck runs approx. 180-190 degrees but from time to time (mainly when I am coming to a stop) the temp jumps up to 260 degrees. I push in the clutch and rev up the engine and it jumps back down to normal temperature. What could be causing this?

**Palf70Step** · 03-26-2014, 04:35 PM

Are you running a fan shroud?

Sounds like at rest your not getting the air to pull thru the radiator.

Claytona08 · 03-26-2014, 04:40 PM

Quote:

Originally Posted by Palf70Step

Are you running a fan shroud?

Sounds like at rest your not getting the air to pull thru the radiator.

It's all stock. Are you talking about the aftermarket fans that mount to the radiator?

**Palf70Step** · 03-26-2014, 06:40 PM

No I meant the factory one that fits behind the radiator and wraps around the fan

Claytona08 · 03-26-2014, 06:49 PM

Oh ok, yeah my truck has that.

donut · 03-26-2014, 07:07 PM

Fan clutch failed? Or maybe an air bubble?
Throwing out suggestions.

Chevy3+3 · 03-26-2014, 11:37 PM

Bad water pump? Maybe the impelled is trashed and only flows enough when at a higher RPM or moving. Also check your thermostat. It may be sticking?

Claytona08 · 03-27-2014, 08:55 AM

Someone suggested that I start by loosening up my radiator cap and driving for a short time. If that didn't fix it then have Autozone check my cap and or replace it. Then look into changing out my water pump.

Dead Parrot · 03-27-2014, 09:56 AM

I would double check that the temp gauge is reading correctly first.

How many blades does your fan have? IIRC some have 5 and other have 7.

How quickly does the temp rise at idle?

Chevy3+3 · 03-27-2014, 11:21 AM

Several years ago I bought a radiator cap with a built in temp gauge in it. That way I can double check my temp and compare to my gauge. It has come in very handy.

03-26-2014, 08:50 AM	#1
Claytona08 Registered User Join Date: Mar 2013 Location: Silsbee Tx. Posts: 880	Temp Gauge Hey guys, I drained all the fluid out of my radiator because it was real dirty and brownish and the gasket was bad on the thermostat so I decided to replace the thermostat and put new fluid in the radiator. When I am driving the truck runs approx. 180-190 degrees but from time to time (mainly when I am coming to a stop) the temp jumps up to 260 degrees. I push in the clutch and rev up the engine and it jumps back down to normal temperature. What could be causing this? __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=580955 http://youtu.be/JYoQJYTXKqI 1984 Chevrolet Scottsdale C10 "Project Platinum C10" 1971 Chevrolet Chevelle "Project Car"

03-26-2014, 04:35 PM	#2
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,767	Re: Temp Gauge Are you running a fan shroud? Sounds like at rest your not getting the air to pull thru the radiator. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

03-26-2014, 06:40 PM	#4
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 46,767	Re: Temp Gauge No I meant the factory one that fits behind the radiator and wraps around the fan Attached Images __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

03-26-2014, 06:49 PM	#5
Claytona08 Registered User Join Date: Mar 2013 Location: Silsbee Tx. Posts: 880	Re: Temp Gauge Oh ok, yeah my truck has that. __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=580955 http://youtu.be/JYoQJYTXKqI 1984 Chevrolet Scottsdale C10 "Project Platinum C10" 1971 Chevrolet Chevelle "Project Car"

03-26-2014, 07:07 PM	#6
donut Registered User Join Date: Aug 2009 Location: S.C. Posts: 1,593	Re: Temp Gauge Fan clutch failed? Or maybe an air bubble? Throwing out suggestions. __________________ '86 C-30 dually, 454/tbh400 '73 K-20 350/350/205 (sold ) I'm kinda like duct tape- no real purpose, but handy to have around.

03-26-2014, 11:37 PM	#7
Chevy3+3 Registered User Join Date: Oct 2013 Location: Winfield KS Posts: 489	Re: Temp Gauge Bad water pump? Maybe the impelled is trashed and only flows enough when at a higher RPM or moving. Also check your thermostat. It may be sticking?

03-27-2014, 08:55 AM	#8
Claytona08 Registered User Join Date: Mar 2013 Location: Silsbee Tx. Posts: 880	Re: Temp Gauge Someone suggested that I start by loosening up my radiator cap and driving for a short time. If that didn't fix it then have Autozone check my cap and or replace it. Then look into changing out my water pump. __________________ http://67-72chevytrucks.com/vboard/s...d.php?t=580955 http://youtu.be/JYoQJYTXKqI 1984 Chevrolet Scottsdale C10 "Project Platinum C10" 1971 Chevrolet Chevelle "Project Car"

03-27-2014, 09:56 AM	#9
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,521	Re: Temp Gauge I would double check that the temp gauge is reading correctly first. How many blades does your fan have? IIRC some have 5 and other have 7. How quickly does the temp rise at idle?

03-27-2014, 11:21 AM	#10
Chevy3+3 Registered User Join Date: Oct 2013 Location: Winfield KS Posts: 489	Re: Temp Gauge Several years ago I bought a radiator cap with a built in temp gauge in it. That way I can double check my temp and compare to my gauge. It has come in very handy.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.