Truck is running hot and can't figure out why - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bulldog88 · 07-25-2016, 03:29 PM

So my 2000 Silverado is running hot, replaced radiator 8 months ago, replaced water pump today, replaced all heater and water hoses and still gets hot don't know why, checked oil and it's clean, not milky like signs of a blown head gasket, it will run about 10-15 minutes and it will get up to 260 temp. It has fan shroud and every thing stock and can't figure out what's going on

Bulldog88 · 07-25-2016, 03:31 PM

It's blowing the water out through the water tank reservoir, thru the hose

Valarius_Starchaser · 07-25-2016, 03:52 PM

Thermostat?

Bulldog88 · 07-25-2016, 04:53 PM

I've changed it out already

68C15 · 08-18-2016, 06:29 AM

what temp is the coolant actually? Is the gauge reading right? The stepper motor in the gauge could be off. A scan tool might be of some help

Flying Hamster · 08-19-2016, 09:42 PM

Pressure test the cooling system. Just because the oil is O.K. doesn't mean that the head gasket is O.K., only that it didn't blow into the oil system. Look for a cracked head or block.
What engine do you have? Early 4.8 had a porosity/crapulence issue with the Castech heads. Don't know if 5.3 uses same head.

07-25-2016, 03:29 PM	#1
Bulldog88 Registered User Join Date: Nov 2009 Location: DFW,TX Posts: 233	Truck is running hot and can't figure out why So my 2000 Silverado is running hot, replaced radiator 8 months ago, replaced water pump today, replaced all heater and water hoses and still gets hot don't know why, checked oil and it's clean, not milky like signs of a blown head gasket, it will run about 10-15 minutes and it will get up to 260 temp. It has fan shroud and every thing stock and can't figure out what's going on

07-25-2016, 03:31 PM	#2
Bulldog88 Registered User Join Date: Nov 2009 Location: DFW,TX Posts: 233	Re: Truck is running hot and can't figure out why It's blowing the water out through the water tank reservoir, thru the hose

07-25-2016, 03:52 PM	#3
Valarius_Starchaser Registered User Join Date: Sep 2015 Location: Sioux Falls, South Dakota Posts: 702	Re: Truck is running hot and can't figure out why Thermostat? __________________ "Orange Crush"

07-25-2016, 04:53 PM	#4
Bulldog88 Registered User Join Date: Nov 2009 Location: DFW,TX Posts: 233	Re: Truck is running hot and can't figure out why I've changed it out already

08-18-2016, 06:29 AM	#5
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: Truck is running hot and can't figure out why what temp is the coolant actually? Is the gauge reading right? The stepper motor in the gauge could be off. A scan tool might be of some help __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

08-19-2016, 09:42 PM	#6
Flying Hamster Registered User Join Date: Aug 2015 Location: Starbase 4 Posts: 118	Re: Truck is running hot and can't figure out why Pressure test the cooling system. Just because the oil is O.K. doesn't mean that the head gasket is O.K., only that it didn't blow into the oil system. Look for a cracked head or block. What engine do you have? Early 4.8 had a porosity/crapulence issue with the Castech heads. Don't know if 5.3 uses same head.



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