What is the most effective way to flush coolant? - Nissan Xterra Forum
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#1 Old 06-02-2012, 07:27 PM
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What is the most effective way to flush coolant?

I checked YouTube and there were some good ones, but not Xterra specific. Some even installed hose attachments to connect a garden hose and flush the system.

From what I've read, is this correct?

1. Drain radiator

2. Fill with Prestone FLUSH

3. Run car for 15mins with cap off to BURP system. Turn on heat full blast.

4. Drain again

5. Full with 50/50 water/coolant

6. Run car again for 15mins with heat on

7. Drain again.

8. Refill with ZEREX Asian Vehicle coolant

9. Done

Yes/no?



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#2 Old 06-03-2012, 01:44 PM
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Environmental Assualt by Coolant Rinsing

Quote:
Originally Posted by BrushWorks View Post
I checked YouTube and there were some good ones, but not Xterra specific. Some even installed hose attachments to connect a garden hose and flush the system.

From what I've read, is this correct?

1. Drain radiator

2. Fill with Prestone FLUSH

3. Run car for 15mins with cap off to BURP system. Turn on heat full blast.

4. Drain again

5. Full with 50/50 water/coolant

6. Run car again for 15mins with heat on

7. Drain again.

8. Refill with ZEREX Asian Vehicle coolant

9. Done

Yes/no?
In short, no....that is a waste of time and an abundance of waste generation for a low risk issue related to old fluid.

Drain old, there isn't 1% of old fluid remaining pooled in the system.
Fill with water, circulate for a couple minutes DO NOT ALLOW TO HEAT UP with straight water.
Drain...there isn't 1/1000 of original coolant remaining and it is biologically harmless at this stage.

Fill with proper 50/50 mix and away you go.
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#3 Old 06-03-2012, 01:52 PM
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Quote:
Originally Posted by ramblinche81 View Post
In short, no....that is a waste of time and an abundance of waste generation for a low risk issue related to old fluid.

Drain old, there isn't 1% of old fluid remaining pooled in the system.
Fill with water, circulate for a couple minutes DO NOT ALLOW TO HEAT UP with straight water.
Drain...there isn't 1/1000 of original coolant remaining and it is biologically harmless at this stage.

Fill with proper 50/50 mix and away you go.
Thanks for that.

Of course after I ask such a question, my car decides to puke coolant all over the engine.

It shouldn't be the pump, it's less than a year old. My car was also still running and moving when I overheated.

There was a large amount of steam coming from the stem below the the radiator cap.

I don't know if that's a pressure release area or if the plastic stem of the radiator cracked.

The fluid is all over the top of the engine. Like I stood in front of the car and just sprayed it with a hose.

I would think if a head gasket failed, that the fluid would just pour out.

Any thoughts on this?

Thanks



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#4 Old 06-03-2012, 05:55 PM
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Radiator Leak / Engine Coolant Steam Bath

Quote:
Originally Posted by BrushWorks View Post
There was a large amount of steam coming from the stem below the the radiator cap.

I don't know if that's a pressure release area or if the plastic stem of the radiator cracked.

The fluid is all over the top of the engine. Like I stood in front of the car and just sprayed it with a hose.

I would think if a head gasket failed, that the fluid would just pour out.

Any thoughts on this?

Thanks
First, wait for engine to cool down then rinse entire engine bay to get the coolant off all the rubberized items. DO NOT RINSE A HOT ENGINE

Let dry before you try to crank !!! If you have a leaf blower, you can push the water out of the accumulation points. I think the spark plug wells are a shallow area which can be a problem for wash downs.


Your leak could be one of a few things.....

You should have a hose from just below the radiator cap down/over to the expansion tank. If the hose is loose, it will vent steam instead of fluid back to tank.


If the radiator has a crack in the area around the cap, which is common, you will need to replace the radiator. $130 max and about hour of time. very easy.


OR, look carefully, could it be one of the upper radiator hoses connecting near the cap ?

My hose rupture was the bypass hose left and below distributor. steam / fluid was everywhere and it took a while to find the source until after I refilled radiator with coolant mix.
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#5 Old 06-04-2012, 08:17 PM
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So the latest is it's a cracked radiator. Thankfully that's all it is. I feared the worst, that it was a valve gasket.

My brother did a pressure tesT to determine It was the radiator. So he ordered me a new radiator and cap. I believe there's a NAPA location near me to pick up some ZEREX asian formula coolant.



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#6 Old 11-10-2012, 06:26 PM
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Quote:
Originally Posted by ramblinche81 View Post
In short, no....that is a waste of time and an abundance of waste generation for a low risk issue related to old fluid.

Drain old, there isn't 1% of old fluid remaining pooled in the system.
Fill with water, circulate for a couple minutes DO NOT ALLOW TO HEAT UP with straight water.
Drain...there isn't 1/1000 of original coolant remaining and it is biologically harmless at this stage.

Fill with proper 50/50 mix and away you go.
I checked mine today. My anti freeze is really clean, but was only good to 10 degrees. I wanted to drain a gallon out, and add straight anti freeae, instead of 50/50. Where is the drain plug on these rads? I looked forever, I could not find it?
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#7 Old 11-10-2012, 06:47 PM
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Quote:
Originally Posted by TonyPgh View Post
I checked mine today. My anti freeze is really clean, but was only good to 10 degrees. I wanted to drain a gallon out, and add straight anti freeae, instead of 50/50. Where is the drain plug on these rads? I looked forever, I could not find it?
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Bottom of the radiator, slightly off center towards the drivers side. May be a rubber skirt you have to remove to find it. Drain looks like this.


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#8 Old 11-10-2012, 06:49 PM
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Quote:
Originally Posted by RacerXXL View Post
Bottom of the radiator, slightly off center towards the drivers side. May be a rubber skirt you have to remove to find it. Drain looks like this.

Thanks! I will check in the morning. I did see a rubber skirt across the front, but never touched it. I kept looking on the sides...ugh!!!
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#9 Old 11-10-2012, 07:08 PM
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Careful when installing and re installing the drain plug.I managed to strip mine

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#10 Old 11-10-2012, 08:54 PM
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yep, theres a rubber skirt there, just pull on the front side and the plastic clips will come out. THen it will expose the bottom of the radiator and that drain plug.
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