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Thread: Overheating solved
12-07-2010 09:53 AM #1
- Bekasi, , IndonesiaMember No: 167585
- Join Date
- Sep 2008
- Rep Power
My long outstanding overheating issue was finally solved. It was the upper radiator hose that leaking somewhere around the area where it is clamped. The leak was so tiny I could not spot it. It leaves no coolant trace either.
After having to replaced the radiator due to leak at the bottom of the expansion bottle and fan clutch about a year-and-a-half ago the car running with this frustrating overheating issue ever since. I had to replace the thermostat housing twice since the first one was non-OEM part it didn't seal correctly especially when pressure inside the system rise while driving the S or M mode.
The same situation happened with the old hose. The leak was not that obvious it still can hold pressure while driving with D mode. Ed, Craig, Jimlev and many others were right: I should have done pressure test months ago!
Now I am sure the system is perfectly sealed. Bleeding process was not hard at all. I have been using the S and M mode for the last couple of days without worries. The side effect was good too: the auto transmission shifts much smoother! I remember this advice posted in E34 forum when I joined the group few years ago: bleed...bleed and bleed some more!
Thank y'all!! :)
528i E39 1997
Automatic ZF 5HP18
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