All of you are on the same line of logic I’m on.
I tried yesterday, for about 2 hours total. My driveway is Very steep. I had the car backed up “on the banking.” Unbolted, Raised and suspended the expansion tank above the heater core( what I read unofficially online as proper procedure).
Their has to be something procedural I’m not doing, but I can’t find a good, concise source for the procedure.
I’ve tried it with cap on and off expansion tank, idle,increased rpm and high RPM. I lost coolant from expansion tank when thermostat opened and cap was off, high rpm, that high rpm was required to get enough heat in it to open stat. And increase flow.
Car runs on the stat and cooling system is very efficient,electric fan rarely if everver runs unless your turn it real hard to build heat while stationary.
I flushed core both directions, with garden hose attached directly, little to zero restriction, no sediment or discoloration. Rad is less than a year old.
When driving down the road I have 120*+ from the vents.
Trudging around VW forums, but not finding a definitive procedure.
There is a small hole in one of the heAter hoses that allows you to slide hose back while still connected and purge air out, just seems I can’t get it all out. Like I need to force flow thru core to get all air out. Pinch a hose somewhere? Purge When stat opens?
I can fix Or figure out anything......except this. My patience for time spent is spent.
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