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Hey all - I posted this in my build thread but was hoping you could help with an issue I just cant sort. The info is below:
So I am seeing a strange cooling system issue:
I noticed that during cool evening drives with minimal (or no) hard driving the fan would still kick on at lights. I noticed that I only had high speed fan funciton, due to this issue I replaced the fan with one that gave me both speed one and speed two.
after that I could not get the thermostat to open and the fan was still running what I considered to be too much. The radiator was hot at the top - and the top hose appeared to be filled with air, so I cracked the bleeder and got the fan to cycle like it had been, but the system would not purge coolant from the top of the radiator.
I felt the top hose - blistering.
I felt the bottom hose - stone cold.
I felt the radiator - only the top cap was warm the rest of the radiator was as cold as the bottom hose.
I also noted that the over flow nipple in the expansion tank was constantly purging.
Although I had already checked the thermostat I decided to take it out to rule out a blockage some where else in the engine. Once the thermostat was out I was finally able to get the system to pressurize (read - dribble out of the bleed port on top of the radiator). So - I took the car for a long and arduous drive through east canyon. Fan never kicked on one time.
I get the car back home - and now the turbo seems to be wet with coolant on the top of the core. I am really stumped here.
The arrows seem to dictate that the top of the turbo is for return coolant to the head. I have new feed and coolant lines to the the turbo, I was thinking maybe they were clogged - but that is not the case. I am failing to see how removing the thermostat moves the point of weakness to the turbo.
after all that info maybe you guys can help me figure why:
1) With thermostat in the top radiator tube/ cooling system will not purge
2) Why without the thermostat the system purges but now turbo gets wet with coolant
Last edited by ((A.V.))mk-1; 22 October 2016, 14:19.
I don't know the answer, but I'd disconnect the radiator top and bottom and run a hose pipe of water through the radiator to make sure it is not fully or partially blocked ?
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