Ln167 cooling system

[Zaccyion]

I have a 3.0 turbo diesel hilux.
I’ve replaced water pump, thermostat, and radiator. I’ve bled the air out, the fan is coming on when it’s supposed to. I’ve done a pressure test no leaks,  and a compression test. To see if the head gasket is gone. All fine. It’s still overheating I can drive it fine for about 2 minutes then it will start heating up. I have to move in a week and can’t afford a mechanic at the moment so any help or advice would be helpful. Cheers 

Edited March 19, 2023 by Zaccyion

[CONROD]

When you say its heating up it might not necessarily be overheating. If the temperature sender wire earths out it will head straight to the "H" on the gauge, Have you got another senser to put in, that will eliminate that.

Just another thought, the Bottom radiator hose isn't sucking in & collapsing. Remove the thermostat altogether and see how it behaves, I,m not being a smart ***** , but it is in the right direction, Hope you sort it out bud , keep us informed of the outcome

Edited March 19, 2023 by CONROD

[Tony Prodigy]

13 hours ago, Zaccyion said:

I’ve replaced water pump, thermostat, and radiator. I’ve bled the air out, the fan is coming on when it’s supposed to. I’ve done a pressure test no leaks,  and a compression test. To see if the head gasket is gone. All fine. It’s still overheating I can drive it fine for about 2 minutes then it will start heating up.

I feel your pain mate. This has to be so frustrating for anybody. Spend all the money and time and still have the issue exist.

I have to wonder though, and CONROD, hit on something here, the gauge could be giving a false reading. 
I can't see how any modern engine can go straight to "H" on the gauge after a few minutes. I don't think it's possible, even when an engine is sickly with cooling issues, the gauge will go to half, three quarters and close to full, but not that quick.

If you have a temperature probe, insert it inside the top radiator hose and monitor the actual water temperature manually. With coolant, it shouldn't exceed 90 degrees C. If it does then yes, you have an issue, and yes, monitor that bottom hose too. If it is collapsing during suction it may be restricting water flow.

Very keen to hear the follow up. Good luck