Rusty Coolant

[Crimpage]

Hi All,

The coolant in my radiator is fairly rusty and I have run a coolant flush, then flushed the radiator. How can I flush the water that is still in the engine block? If possible, I don't want a fill up, run, cool, empty etc solution as I have done this about 8 times and it is still pretty bad...

Is there a way to push the water through the block without the engine on?

Thanks,

Dave.

[lwells]

Hi All,

The coolant in my radiator is fairly rusty and I have run a coolant flush, then flushed the radiator. How can I flush the water that is still in the engine block? If possible, I don't want a fill up, run, cool, empty etc solution as I have done this about 8 times and it is still pretty bad...

Is there a way to push the water through the block without the engine on?

Thanks,

Dave.

There is a block coolant drain plug. This guide I posted some time ago has details:

http://www.skylinesaustralia.com/forums/in...showtopic=67730

Out of interest, did you get your radiator professionally flushed, or did you do it yourself?

Edit I just noticed the images aren't working (again! I only fixed them last week! ) after the gallery upgrade. Hmm.

[Syphon]

Umm no offence but that has to be the most difficult way I have ever seen to flush a cooling system.....

Note, be doing this on a completely cold engine!

And also make sure you have the heater set to on, so that your flushing through the heater core aswell ( one of the first things to rust through )

Personally I would undo both top and bottom radiator hoses from the radiator end, then flush the radiator until you get clear water coming out.

With the rad hoses still attached to the motor, alternate between flushing through the top hose, then through the bottom hose, same again until you get clear water.

Then remove a heater hose, easiest spot would be at the firewall, say top heater hose will do, shove hose in and flush through hose and through pipe into heater core, you should get more shit flowing out the top and bottom radiator hoses.

Bolt all the hoses back on once your satisfied its all clean water remaining, remove bleeder screw, fill radiator back up, preferably get something like a coke bottle, cut in half, wrap some tape around the mouth piece of it and use as a funnel in the radiator filler neck. You want it to sit higher than the motor or atleast higher than the bleed point.

Start motor, fill with water, let run for awhile. imo, i prefer to let them run until the thermostat opens ( can take a long time, 30 mins ), otherwise let it atleast warm up, and keep an eye on bleeder point. Once you have minimal amount of air bursting out bleeder, put screw back in bleeder. whack cap back on radiator. Job pretty much done.

* When using coke bottle or similiar as funnel, water will be forced into the overflow bottle. Best thing to do is remove hose from filler cap which runs to overflow bottle. Grab some spare hose that fits, chuck a bolt in one end, and push it onto the overflow nipple on the filler neck.

[lwells]

Umm no offence but that has to be the most difficult way I have ever seen to flush a cooling system.....

No offense taken. Its merely the way that Nissan designed the coolant to be dropped; its stupidly hard to get to (from underneath; very easy from up top but that requires the turbos out ).

Another possibility is to also purchase a radiator sock post flushing to collect loosened crap.

[Crimpage]

I have read that thread before. Having a non turbo, do I still have to pull all that shit off to get to the draig plug?