Last week I had the car run a little longer so it was firmly warmed up. I still found the car was running idle high again. After a while it dropped a little around 1000 RPM which is still to high. I figured the car required a good run so I decided to stop and leave it. But I spotted again a small coolant leakage but could not identify exactly where. I recalled this old blog from 2019 and something was not tightened at a bottom hose:
https://erwinxjs.blogspot.com/2019/09/coolant-leakage-check.html
It looked it was from the same area. So yesterday I made new attempt to warm it up. And this time the issue occurred much quicker and now it was quite visible as well. It was the top hose which potentially was never firmly attached:
I was able to losen it up using a normal spanner and shift it slightly so via excisting hole at the top bar I was able to firmly tighten it with a socket wrench. Afterwards it was no longer leaking:
Afterwards when starting up again and the engine was still warm it was now running nearly 800 RPM, which I think is what it should be. Not sure though. At least much better.
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