Are you sure you are turning the drain in the correct direction? If you are then if the lower radiator
hose clamp is fairly accessible you might try taking that off but be ready for a flood of coolant. Good luck. Neil W.
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there should be a drain **** on either side of the lower radiator. you might have to remove the splash guard to get to it easier, If it is not leaking then the o ring does not need replaced when you drain, the drain plug does not have to be removed all the way, it has a drain hole on it when the plug is loosened to a certain point it will allow to drain. If you remove all the way then go ahead and inspect o ring and replace before installing again. but always lube an old or new rubber o ring with (oil) before installing. Installing a dry rubber o ring will result in possible failure.
Park the car on a level surface, turn off the engine and let the engine cool a minimum of 2 hours before beginning to remove and replace the thermostat.
Place the bucket under the driver's side corner of the radiator beneath the radiator draincock (located on the bottom of the radiator). Remove the filler cap from the radiator.
Shape a large piece of aluminum foil to form a funnel or channel from beneath the draincock to the bucket, Pinch high side walls in the aluminum foil so it will direct the flowing coolant into the bucket and not allow any to spill on the ground or into the engine.
Turn the draincock clockwise to open it and drain the coolant from your radiator and hoses. Close the draincock when you have finished draining the system.
Locate the thermostat housing. The housing will be on the top of the engine; you can find it easily no matter what model year Saturn you have, by following the main hose coming from the radiator to the engine block. That hose will end at the thermostat housing and there will be one or two houses coming off the housing as well. Disconnect the hoses from the housing.
Using your socket set, remove the bolts holding the thermostat housing in place. Put the tip of your paint scraper between the housing and the engine block and pry up gently to remove the housing. Once the housing is free, remove the gasket that was between the housing and the block. If necessary, use the paint scraper to scrape off any old gasket that is stuck to the metal.
Pull the old thermostat from its seat. The thermostat has a circular steel top with what looks like a raised handle. Simply lift the old thermostat out and place the new one into position.
Lay your new thermostat housing gasket into place and re-install the housing. Tighten the bolts down. Re-connect the hoses and refill your radiator with new coolan
Look near the front of the passenger side wheel well. You'll find the drain **** there.
There's a draincock down at the bottom. Open it up and drain the
radiator. What I like to do next is remove the t-stat and replace
waterneck. Now fill radiator with water (actually fill degas bottle)
and run engine with upper hose removed at radiator. Flush until only
clean clear water comes out of hose. Drain radiator, replace t-stat,
fill radiator with coolant and you're done.
Hope helped with this; remember rated this help. Good luck.
Hope this helps you.
Here are the basics. There are many problems you may run up against (frozen bolts, stubborn or cracked hoses, rusted clamps, etc)that may need to be fixed or replaced before proceeding:
SHut off engine, allow to cool completely.
Disconnect the cooling fan, remove negative battery terminal connection.
Drain radiator by opening draincock and/or removing lower radiator hose, collecting coolant in a drain pan. Do not let it go onto the ground - bad for environment!
Open top radiator hose to allow remainder of coolant to flow out. A few quarts of coolant will remain in the engine block. You will want to totally flush and refill AFTER replacing the radiator to get all the crud out of the system.
Unbolt radiator and disconnect any other items still attached (transmission cooler, temp sensor wires, etc.).
Remove radiator and replace with new, reattaching all items removed from old radiator. Inspect other items and possibly replace suspects. Reattach hoses and make sure the clamps are tightened without pinching hoses excessively.
Do a flush job with water/radiator flush, making sure the water runs clear out the draincock. Instructions for flushing the cooling system are usually printed on the radiator flush bottle. Be sure the heater is on and the engine warms up completely to open the thermostat. SHut off engine and drain as much water as will leave.
Fill with 50% coolant mix (Dexcool or equivalent). Estimate water remaining in the engine and add 100% coolant to balance. COmplete fill with 50% mix. Remove air by running engine until warmed with the radiator cap off, adding coolant mix along the way.
The only way I've ever flushed a radiator is by removing bottom hose and letting fluid drain from there. With a truck, this should be a piece of cake, due to the bottom clearance. I wouldn't mess with the deaincock as you may break something, and get to spend money fixing that too. Just my 2 cents..Good luck