Discussion Starter · #1 ·
Hey all. I've decided to flush my radiator and refill with new fluid. Anybody got any recommended procedure to do the radiator flush?
i actually am gonna have the plugs out on thursday or friday for some other work and i may look into removing those engine plugs and checking for build up since i will have the coolant drained already.If you want a good flush. First order a new thermostat and get some RTV seal. Then order some engine block plugs (there is one to each side to allow the you to drain the coolant from the lowest part of the engine). By pulling the plugs you allows the crap to drain out first before flush. Pulling the lower plugs is optional in a flush. Also order new plugs just in case. To remove the plugs remove both tires.
1. Get a big pan.
2. pull the top engine air relief plug
3. Drain the radiator.
4. Pull lower hose
5. Pull upper hose and remove thermostat.
6. Drain from lower engine plugs (optional).
7. Put lower hose back on, put plugs back in and LEAVE OUT thermostat.
8. Put water hose in radiator fill cap.
9. Turn water on till you get all antifreeze out.
10. Undo everything and drain all water out.
11. Put everything back together. Including new thermostat.
12. Fill everything back up (leave off the air relief plug on top of engine).
13. Run engine and let warm up, add coolant when needed.
14. Air will escape the air relief plug as needed.
15. When everything is good put plug back in and drive truck around.
16. Check fluid level for the next couple days.
If the engine block has not been flushed you may have enough crap in the lower engine plugs that antifreeze will not come out. Caution: If the plugs are removed and hole is clean the antifreeze will spray out like Niagara falls.
This description maybe overkill to some but this is the best flush and fill you can get and helps to eliminate clogging of the heater core with debris from the lower part of the engine.
Cheers and good luck - It's a messssssy job.
I've read this before from the FSM and I doubt Nissan tech would do this. For one reason that would have to wait for the engine to cool down to do this again, and again. At 65.00$+ hr your coolant flush and fill would take all day. They just hook it up to machine to flush your system with some additive to loosen the gunk. That is why you sometimes they heater core clogs because all the gunk ends up in the heater core. Had an old S10 do this to me and the water pump leak after the dealership flush and fill.not sure how different your 01 is from the 04 but here is the actual procedure from factory service manual pretty much word for word.
i am sure either way is fine.
Flushing cooling system:
1.) fill radiator from the filler cap above the radiator upper hose and reservoir tank, with water and reinstall the filler cap above the upper radiator hose.
2.) run the engine until it reaches normal operating temperature.
3.)press engine accelerator 2-3 times under no load.
4.) stop engine and wait until it cools down.
5.) drain radiator.
6.) repeat 1 thru 5 until radiator drains clear water.
like i said, dont want to knock the other guys advice but just thought that might help. its what the nissan tech would do if ya brought it in so maybe the other way is much better.
i actually am gonna have the plugs out on thursday or friday for some other work and i may look into removing those engine plugs and checking for build up since i will have the coolant drained already.
glad i read this post. thanks