m sprank Posted August 10, 2018 Share Posted August 10, 2018 Originally posted in 2011. Re-posting here for easier member searching. It is not necessary to perform a “cool down/idling” procedure on Subaru WRX/STi/LGT/OBXT/Forester/Baja turbo models, as was recommended with past turbo models. The current 2.0/2.5 liter turbo engine has a far greater cooling capacity and, coupled with technology advances, makes this practice no longer necessary. This explains why information about a cool down is not included in the Owner’s Manuals. The heat contained in the turbocharger begins to vaporize the coolant at the turbocharger after the engine is stopped. This hot vapor then enters the coolant reservoir tank, which is the highest point of the coolant system. At the same time the vapor exits the turbocharger, coolant supplied from the right bank cylinder head flows into the turbo. This action reduces the turbocharger temperature. This process will continue until the vaporizing action in the turbocharger has stopped or cooled down. Link to comment Share on other sites More sharing options...
SCASEYS Posted August 13, 2018 Share Posted August 13, 2018 So anyone with a turbo timer on a 2.5 has wasted their money. I donated to LegacyGT.com which allows me to have this nifty signature. If anything SCASEYS posts ever becomes a sticky i'm gonna light this whole place on fire Link to comment Share on other sites More sharing options...
m sprank Posted August 14, 2018 Author Share Posted August 14, 2018 If using a liquid cooled turbo, generally yes. It would take a custom set up with no reservoir and or real track time. If track time requires more cool down a turbo timer would not normally be the method used. A turbo timer is for a daily driven oil cooled turbo car. Link to comment Share on other sites More sharing options...
1-3-2-4 Posted August 15, 2018 Share Posted August 15, 2018 If I’m driving hard if I’m about a mile away from my destination I ease way up off the throttle Link to comment Share on other sites More sharing options...
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