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Registered
Join Date: Oct 2014
Posts: 333
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Bleed valve
Hi
Porsche 996 c4s just changed thermostatic/ pump /coolant car running ok. Temperature good.Only thing i notice is when came back from a run looked at coolant tank and the bleed valve was up ,When undone cat let some pressure out it went back down .Is this normal |
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02-15-2018, 07:28 AM
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Registered
Join Date: Jan 2008
Location: NJ
Posts: 1,186
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Yes, normal.
It is not a "Bleed" valve per say. It is actually a vacuum break that allows the system to reach atmospheric pressure by holding the seal open when the bail is snapped up as the engine cools down. This encourages air bubbles to migrate to the expansion tank and then out of the system.
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2013 991.1 Carrera S Cab 2004 996 Turbo CAB X50 sold 2003 996 cab 6 speed Sold 1972 RS 3.2 twin plug short stroke crank fire, roll bar, sold DE instructor since 1985 |
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02-16-2018, 05:39 PM
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