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Technically speaking, the cooling system uses a 50-50 mix of coolant and water. You can buy coolant already mixed, or full strength. There are hydrometers that you can buy to test the condition of the coolant. I would suggest draining the radiator and refilling with full strength, then test it. You would still have some water in the block and heater core to mix with the new coolant.
best way to flush radiator is to drain the coolant into a container first. Then you should buy a prestone flush kit from wal-mart. They are only like $3. Intall into your cooling lines, as per directed by instructions on package, hook up a water hose and run it through till clear. The instructions on the kit will guide you step by step. Hope this helps you out.
Once the engine has cooled, locate the radiator drain plug and place a
large catch pan underneath it. To expedite the draining process, remove your radiator fill cap to allow
air to enter the system. With the cooling system
refilled with tap water, replace the radiator fill cap and run the engine
allowing it to reach operating temperature.drain radiator, At this point, if you have opted to purchase a
radiator flush kit, you should refill the cooling system with tap water
and add the caustic fluid as directed.
Run the engine for as long as the radiator flush kit calls for (usually
less than 10 minutes). follow directions on bottle for flushing. if you feel you want to use a T connection just cut into return line, from heater core. then you can use a garden hose to flush system.
Theres no such thing as a diagram, here are the draining instructions, hope this helps...
1-Place a large drain pan beneath the radiator drain plug. The drain plug is located on the passenger side at the very bottom of the radiator on the engine side.
2-Make sure the engine is cool. Open the hood of the truck and remove the radiator cap.
3-Loosen the drain plug. On the 2000 Blazer, the drain plug is a wing-nut type of plug. Twist it with your fingers until the coolant begins to drain.
*To flush the block, once you have drained the radiator, run the engine for a bit untill the temp gauge goes up to normal, then the coolant will have been evacuated from the block.DO NOT leave the engine on, once it reaches normal temp, (this will happen quick) turn off right away, otherwise you'll be forking out a few hundred $$$ to fix the worped heads. 4-Tighten the drain plug with your fingers once the coolant has drained fully from the radiator. Remove the drain pan and dispose of the used coolant properly. Some service stations will take and recycle your used coolant. Hope this helps...
you need, knife/ gear clamp,screwdriver /nut driver (for gear clamp) and garden hose
with water pressure hook up hot water is better
you can buy a can or to of rad flush but dishwasher soap works good (it wont suds up )
also rad flush kit with garden hose addapter (most kit are compatable)
1-drain existing coolant in container for recycling
2-locate heater return hose to block and cut to installed flush kit addapter
always better to reveres flussh system with engine off and rad cap removed
drain valve closed hook up garden hose and run hot tap water true system
it will eventually cove out your rad cap (surge tank) until it runs clear
know sut off the garden hose add your cleaning additives installed rad filler cap
run engine per direction on can or 10 to 15 min. sut off engine removed filler cap
open drain valve on radiator and drain out system open water from garden hose
run water until clean water run true shut off garden hose and removed cap off with
cap supplied with kit let system drain completly . repeat cleaning operation until
water runs clear
add 1 jug of concentrated coolant (will mix with ressidual water and finish filling
system with premix used recomended coolant only for your engine your freeze
point of new coolant should be above spec and will be fine
do not used pure concentrated coolant only .your ownners manual spec section will
give capacities system will hold
I am assuming your vehicle has the pink antifreeze called Dexcool. This is the recommended coolant for all late model GM cars and trucks. This coolant tends to form a pasty sludge in the cooling system which can lead to overheating and/or plugged up heater core. Try flushing the cooling system with a good aftermarket product such as prestone radiator flush. First thing to do is drain all the pink coolant, then add the radiator flush and fill with plain water. Run the engine according to directions on the flush container. Drain the radiator again and refill with plain water. Run the engine for a few minutes and drain again. Keep repeating this until all the pink antifreeze has been eliminated. Fill the system with 2 gallons of green antifreeze. Make sure the antifreeze container says it is compatible with aluminum engine parts. Hope this helps. If it does, then you won't have to replace the heater core.
1.) the drain valve is a bolt type device under the radiator..
2.) different flush has different methods usually buy the flush and follow the instructions.. usually empty radiator by loosening valve underneath tighten back valve when drained pour in flush and top up with water start car and allow to run for 15 minutes (with cap off) cut off let cool and then drain..
Variety of chemical products available at any auto parts store you can use. Follow manufacture's directions. Basics are (with the engine cold) to te enough space in the radiator that you can add the product. Add product and close rad cap. Start engine and warm it up (again follow manufacture's directions) to that the heater core also gets flushed. Now open rad stop **** to drain radiator into disposal container. Fill with clean water. I like to run a hose into the radiator with the engine running, stop **** open and draining and flush it clean after using the chemical flush. Now fill with a 50/50 mixture of the correct antifreeze. Operate the engine until it is at operating temp and let it cool and then recehck the c oolant level. Some cooloing systems will hold a lot of air making them troublesome to cmpletely refill. It is not a big deal as long as you go back and check the coolant level. Use caution if opening an hjot radiator as the hot coolant or steam can blow back n yhou and scald you. Better to always let engine cool down before opening a radiator cap and alsys use a rag to protect your hand when opening a radiator cap. Never add coolant or water to a hot engine unless the engine is running as you can crack the block if you do. There are flush kits that involve cutting a heater hose (not to be confused with a radiator hose) and inserting a fitting that you can connect a hose to to assist in flushing and filing your radiator. .
its a pitcock facing the cab bottom of the radiator, plastic flat. once you find the pitcock just put a bucket underneath and turn it.then refill. if you want to flush(run fluid thru to clean it out) the radiator id suggest taking it in. you dont have to flush it every time you change the coolant out.
Get a prestone flush kit. Splice in the t adaper with the heater hose and follow the directions. Check petcock on side of radiator for drain plug or remove lower radiator hose if you want to drain it next time.