Quote:
Originally Posted by truegearhead
The oil cooler has a vent line on the top of it, what is this connected to? My 2.5 didn’t have one.
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As the oil cooler is the highest point in the cooling system, it tends to collect air bubbles, killing its heat transfer capabilities. Porsche figured this out after a year or so and all the later cars have a line running from that outlet to the coolant tank to allow the air to escape.
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