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You will probably need to drill a hole down through the center of the bolt and remove it with a bolt extractor.
Use a very reputable brand which will be more expensive. You do not want to break the bolt extractor off in the hole because that will be triple trouble.
You probably can, and here's why. See if this is true on your Ranger. Most cars and trucks have the water pump connected to the lower radiator hose. The way it works, the pump pulls (sucks) the water from the bottom of the radiator and pushes it throughout the moter, where it returns in the top hose to be cooled in the radiator. The flow is from top to bottom in the radiator. Unless that bolt is so small it eventually winds up blocking your thermostat, it should probably stay in the water jacket. If it blocks the thermostat some day, it may be retreivable in the thermostat hole. Blessings to you.
follow top large hose from radiator to engine block the thermostat is inside the metal case remove the 2 bolts and lift away remove old thermostat clean old gasket off with razor scraper being carefull not to get anything in the block replace thermostat place new gasket on then put metal case back on and secure with the 2 bolts top off fluids as needed.
Locate the thermostat by following the bottom hose of the radiator (the standard is to follow the top, however it is not there) it should lead toward the back of the engine compartment. The hose will connect to a joint connected to the block, this where you will remove the hose (catch the fluid in something a pan on the ground is easiest) feeling inside the port of the block you should find the thermostat. Remove the two bolts holding the joint to the block, the bottom of the two is the most difficult, I move a few things out of the way, pull out the old stat, line up the new one (it's an off-center type) put it in don't forget the new gasket, refill the system with fluid and check and test.
four
cylinder. Locate the thermostat by following the bottom hose of the
radiator (the standard is to follow the top, however it is not there) it
should lead toward the back of the engine compartment. The hose will
connect to a joint connected to the block, this where you will remove
the hose (catch the fluid in something a pan on the ground is easiest)
feeling inside the port of the block you should find the thermostat.
Remove the two bolts holding the joint to the block, the bottom of the
two is the most difficult, I move a few things out of the way, pull out
the old stat, line up the new one (it's an off-center type) put it in
don't forget the new gasket, refill the system with fluid and check and
test.
follow the large radiator hose from the radiator to the engine, you'll see a large clamp holding the hose onto the neck thats bolted to the engine block, under the neck is where your thermostat is located
It's actually very simple. Follow the upper radiator hose to the top of the engine block. You will see a housing which the hose is attached to. Remove the hose from the housing. The housing will have 2 or 3 bolts holding it down. Remove the bolts and lift the housing off. The thermostat will be sitting there and you simply need to remove it.
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