Cautions:
1. Cats love Coolant. Unfortunatley, it is deadly for them. Dilute any spilled coolant with water. Dont leave out open containers of coolant.2. Always wear SAFETY GLASSES!!3. Cold water in a hot non-running engine will crack engine block, so ensure engine is running or engine is cooled.
================================================COOLANT CHANGE AND FLUSH( click medium pics for large):=================================================Advisory: I'm no expert. Just sharing my experiences. Be sure towear SAFETY GLASSES as boiling hot coolant burns your eyes out and burns any exposed flesh.
Procedure to Drain, flush, and refill coolant1. Move heater "Temp" control lever all the way to "Hot" position.
2. Open drain plug at the bottom of the radiator, and remove radiator cap.(there is a hole to access plastic drain plug, but difficult to reach. I removed one 10 mm screw holding undercover. plug on driver side of radiator)3. Remove drain plug on cylinder block. -coolant is removed-(see pic)4. Close drain plug and tighten drain plug securely. -apply sealant to the thread of drain plug-
(A little ambiguous here. You can supply continuous water with garden hose. They seem to be saying leave radiator plug open. I guess the engine wont over heat as water level drops as it escapes out radiator drain)5. Open air relief plug(10 mm).(see pic)6. Fill radiator with water and close air relief plug and radiator cap.(Note: pouring cold water into hot engine will crack engine, if engine not running)7. Run engine and warm it up sufficiently.8.. Stop engine and wait until it cools down.9. Repeat step 2 through step 8 until clear water begins to drain from radiator.10. Drain water. Replace plastic radiator drain plug. Goes in straight or it will be damaged.11. Open radiator cap and air relief plug.12. Fill radiator with coolant/antifreeze up to specified level.(maybe keep track of how much coolant has gone in. Capacity is 7.25quarts(with reservoir) or 6.75 liters(?)). If you use water at all use distilled water.13. Close air relief plug.14. Remove reservior tank, drain coolant, then clean reservior tank.15. Install reservior tank and fill it with coolant up to "Max" level and then install radiator cap.16. Run engine and warm it up sufficiently.17. Race engine 2 or 3 times under no-load.18. Stop engine and cool it down, then add coolant as necessary.19. find a steep hill and park your car with engine on the high side. run car with rad cap off and relief valve open. shake the
[email protected] TipQuick Tip. After flushing your cooling system, make sure you fill up your cooling system completely. The KA24 engines seem to like to trap air in the system and needs to be bled completely. My friend and I both own 240sx's and after she had a mechanic flush her system, she noticed her car would overheat at idle. Upon inpecting the cooling system, I noticed there were no leaks, and no coolant. An easy way to bleed the system is to run the engine, and keep adding water/coolant into the radiator while shaking various parts of the car. I liked to just push down on the front bumper. Shaking the front end side to side also helped. It took about 30 minutes of this to get all of the air out. At least as much as my body could take!Air rises to highest point.