coolant/radiator issues

[jay see]

I have a 4.5 and it was getting a bit hot when on idle for a few minutes or being stuck in the traffic. Just enough for the elec fan to kick in, but with air flow no problem. The Tallarook drive about 6 weeks ago I ran most of the day at a little under 3/4. Being the first summer with this car and having a sh!t of a time with my last 4wd, I thought I need to sort this out.
I took out the radiator and noticed some dry mud on the outside of the arc of the fan behind the shroud, just above the bottom outlet point of the radiator. Meaning that hot coolant is entering. Cleaned it inside out, put back in, fill radiator, start car, take out top hose from the radiator. As temp starts to raise and the thermostat begins to open keep filling the radiator, this will push all the old coolant out. Once it is just water refit top hose put 5l of concentrate and top up with water.
My temp now gets to the correct level and doesn't move regardless of outside conditions.

[dannypatrol]

I have a 4.5 and it was getting a bit hot when on idle for a few minutes or being stuck in the traffic. Just enough for the elec fan to kick in, but with air flow no problem. The Tallarook drive about 6 weeks ago I ran most of the day at a little under 3/4. Being the first summer with this car and having a sh!t of a time with my last 4wd, I thought I need to sort this out.
I took out the radiator and noticed some dry mud on the outside of the arc of the fan behind the shroud, just above the bottom outlet point of the radiator. Meaning that hot coolant is entering. Cleaned it inside out, put back in, fill radiator, start car, take out top hose from the radiator. As temp starts to raise and the thermostat begins to open keep filling the radiator, this will push all the old coolant out. Once it is just water refit top hose put 5l of concentrate and top up with water.
My temp now gets to the correct level and doesn't move regardless of outside conditions.

Thank mate! Will have a look

[dannypatrol]

Happy newyear everyone, I am working on my car and can't find anything weird. Hoses getting old (crack a little bit when i squueze them) so i will replace those. I am buying some extra coolant today so I can flush the system again. I was also thinking again about what could have happened on the high way. I noticed a little bit of dried stuff around the radiator cap light so liquid seeped out a bit. Considering contained sand dust, it might been that the engine got pretty hot offroad. Then I drive 400k on the road, stopped and coolant comes out of the overflow tube. Than i topped up water and find next day my radiator half empty. Can somebody enlighten me a bit more about how the cooling system should work and why coolant would come from the overflow tube? Was there like an enormous air bubble in the system or something?
How difficult is it to access the state of the heads? Or is it something I should let a mechanic do?

[threedogs]

@ Jay Cee and the others have you removed your radiator and given it a good clean ,
you'll find say the bottom 3"-4" of the radiator blocked with dust which turns to mud.
Could clean a bit at the car wash but dont pull the trigger

[jay see]

I'm pretty sure that this was my problem.

1420155739384.jpg

[threedogs]

That what was what I mean't, wow clean that would make a huge difference
It would be well ,normal lol

[jay see]

That was after a clean while it was in the car.

[dannypatrol]

I haven't been able to take the radiator completely out but it didn't look very dirty. Hope it is as simple as, really no idea what else it could be. will take it out when the hoses arrive. I decided on replacing them because although they are not leaking, they are cracking a bit. Still try to figure out more about the condition of the heads, don't want to be in middle of a desert with cracked ones :s

Been looking at after market temp sensors, seem to be around 140. Might it be better to get an ecu talk considering its only 130 more? Or is it best not to use Nissans own sensor at all?

[megatexture]

Super cheap auto will do mate.
Check your radiator for spare bungs for the sensor that's supplied with the kit. If not you can put a adapter on the top hose to mount the sensor

The only thing else you may need would possibly be a pod
http://www.supercheapauto.com.au/onl...ecommendations

[jay see]

Super cheap auto will do mate.
Check your radiator for spare bungs for the sensor that's supplied with the kit.

I didn't think you could put a sender in the radiator. Is there a free spot in the thermostat housing. I putting one in mine, but don't like the look of the inline ones.