Coolant system upgrading

[Jfrahm]

The thermostat opens quite slowly, and the area where a steam pocket forms (on modded 944 turbos) is in an area where coolant flows all the time. On a 944/924S the cooling system is more than adequate and bleeding is not difficult at all once you have done it a couple times. If you have cooling system problems in a non-turbo or even a stock-ish turbo I'd say you either live in Dubai or you have some issues you need to correct, not design or engineering shortcomings but... somethings busted on your car. Head gasket maybe.

When the thermostat is open it's not really any harder (not significantly) to push the coolant around the system, the coolant just takes a longer path and there should not be any water hammer effect from the t-stat opening or closing.

Even if you do not bother with the helpful techniques for bleeding it's still easy. Just fill it up, take it for a short drive with the heat on, park briefly on a hill or steep driveway and give it a last fill and bleed. Bring a wheel chock of you are not 100% certain of your parking brake.

Originally Posted by kevrobert

Well once its bleed and I am happy that the coolant system is bullet proof then in goes the Waterless coolant but at a £120 dont want to get it wrong. I am going to slightly modify the system buy joining into the the 10mm hose at the coolant bottle and running this through a barbtail connector in place of the thermo valve. The way I see it is when the thermostat opens and the water rushes through the bottom hose the pump and circuit can not deliver enough water through the block hence the rear air pocket forming, now with my simple mod it may just nullify this and then no more jacking car in the air..

[v2rocket_aka944]

Originally Posted by kevrobert

Well once its bleed and I am happy that the coolant system is bullet proof then in goes the Waterless coolant but at a £120 dont want to get it wrong. I am going to slightly modify the system buy joining into the the 10mm hose at the coolant bottle and running this through a barbtail connector in place of the thermo valve. The way I see it is when the thermostat opens and the water rushes through the bottom hose the pump and circuit can not deliver enough water through the block hence the rear air pocket forming, now with my simple mod it may just nullify this and then no more jacking car in the air..

If you bleed it right the 944 cooling system is bulletproof.

The steam vent kit is for higher power turbo engines that have such hot combustion chambers that it vaporizes the coolant over #4 into a small steam pocket which leads to a blown head gasket.

If you have an na... Leave it alone