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Re: changing thermostat in 1999 gmc yukon
Thermostat housing will be located top center of you engine it should have 2 bolts holding it down. Be carfull you may need to drain out some antifreeze before you remove ,and never remove while hot. Thermostate just sits inside this housing.make sure you install the new one in the same direction the old one is in.
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c'mon man, girl, relax , this is not even a problem, did you change thermostat ? hope so, is it installed in the right position ? are your radiator hoses bad, replace if worn , soft, etc., with truck warming up watch to see if hoses collapse, if old replace anyway . use 50/50 coolant mix, are heater hoses ok, not leaking ?
Some of these vehicles have a false petcock. Pop off the lower hose over a catch pan, pour a gallon of water in the plastic Dexcool Coolant bottle and put the hose back on when it stops pouring out. Fill to the max line and run the car until both radiator hoses are hot (thermostat has opened). Replenish fluid to max line and cap the bottle. If you have electric fans make sure they come on and make sure your temp. gauge stays in the middle. It'll take longer on cooler days. You might have to get in the car and gas it to about 2000 rpms. Don't cap the bottle until the thermostat opens. If it vomits, change the thermostat and again make sure the electric fans kick on or the clutch fan speeds up at about 210 degrees.
Hi, if you follow the bottom hose on your radiator to your motor, right where the hose goes is where the thermostat is. Its pretty simple to replace. Follow the hose that goes from the top of the radiator to the top of the engine. The hose is black flexible, roughly 1.5" in diameter. This hose goes into a "gooseneck" on the top of the engine, secured with a clamp. Remove the clamp and the hose, and remove the gooseneck from the engine. The thermostat will be located underneath the gooseneck. Simply lift out the old thermostat, install the new one, and replace the gasket. Reassemble. Take care
Yes, it sounds like your thermostat is stuck in the open position.
Your thermostat is located under a metal housing on the top of the engine. The upper radiator hose connects to this housing. To change the thermostat you basically need to drain the radiator after your engine is cold, disconnect the upper radiator hose from the engine, and remove the bolts from the small housing. replace the thermostat, and clean the surfaces on both sides and replace the gasket too. reinstall the housing, attach the hose, and refill the radiator. start the engine, warm it up and check for leaks, then re check the coolant level after the engine cools off again
Follow the hose that goes from the top of the radiator to the top of the engine. The hose is black flexible, roughly 1.5" in diameter. This hose goes into a "gooseneck" on the top of the engine, secured with a clamp. Remove the clamp and the hose, and remove the gooseneck from the engine. The thermostat will be located underneath the gooseneck. Simply lift out the old thermostat, install the new one, and replace the gasket. Reassemble.
Work on the vehicle cold!! Top radiator hose on this connects to the coolant filler cap gooseneck(no thermostat in here as this is an outlet). The thermostat housing is on the RH side of the engine above the transmission which is the inlet. You will see the LOWER radiator hose running to a pipe and at the end the pipe its connected to the gooseneck (thermostat housing). This is the thermostat location. Be careful with the connectors to the sensors, they may be brittle and will break easily. Hopefully this helps
Top center behind the top pulley. Follow the upper radiator hose to where it connects to the engine. I've always called that piece that the hose connects to, the gooseneck. So you take the hose off, then you take the gooseneck off and there sits the thermostat. Make sure you scrape off the old gasket and replace it with a new one. Also, don't try to run your van without a thermostat, your gas mileage will drop off the charts. We used to do that back in the day before all the computer controlled stuff when I lived in Florida. If I've helpped you, please remember to rate me. Thanks.