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#1 |
Registered User
Join Date: Mar 2013
Location: Silsbee Tx.
Posts: 880
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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?
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#2 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,844
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Re: Temp Gauge
Are you running a fan shroud?
Sounds like at rest your not getting the air to pull thru the radiator.
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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! |
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#3 |
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Join Date: Mar 2013
Location: Silsbee Tx.
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Re: Temp Gauge
It's all stock. Are you talking about the aftermarket fans that mount to the radiator?
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#4 |
State of Confusion!
![]() ![]() Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 46,844
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Re: Temp Gauge
No I meant the factory one that fits behind the radiator and wraps around the fan
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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! |
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#5 |
Registered User
Join Date: Mar 2013
Location: Silsbee Tx.
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Re: Temp Gauge
Oh ok, yeah my truck has that.
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#6 |
Registered User
Join Date: Aug 2009
Location: S.C.
Posts: 1,593
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Re: Temp Gauge
Fan clutch failed? Or maybe an air bubble?
Throwing out suggestions.
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#7 |
Registered User
Join Date: Oct 2013
Location: Winfield KS
Posts: 489
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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?
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#8 |
Registered User
Join Date: Mar 2013
Location: Silsbee Tx.
Posts: 880
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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.
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#9 |
Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,539
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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? |
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#10 |
Registered User
Join Date: Oct 2013
Location: Winfield KS
Posts: 489
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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.
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#11 | |
Registered User
Join Date: Mar 2013
Location: Silsbee Tx.
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Re: Temp Gauge
Quote:
Sounds like a very good idea.
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#12 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Temp Gauge
you mention real dirty and brownish...
any chance it's fluid was mixed green and red? could it have a stop leak in there?
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#13 |
Registered User
Join Date: Mar 2013
Location: Silsbee Tx.
Posts: 880
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Re: Temp Gauge
The water looked rusty. The truck sat for 10 months prior to me buying it without ever being started.
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#14 | |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Temp Gauge
Quote:
anything but a nice bright green I'd reflush it
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#15 |
Registered User
Join Date: Mar 2013
Location: Silsbee Tx.
Posts: 880
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Re: Temp Gauge
Yeah I drained it and filled it back up with half and half
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