Heater on a warm day is the best! Makes you feel like you are in a the desert!

 

hey hey. durring last summer i had to drive with the heater all the time(1989 toyota) or else the car would of overheat. it had some coolant problem, and its just too old. man was my body burning with no A/C, windows all open with heater to the max.

 

I don't even want to try and imagine what that must have felt like! So were you always driving around in shorts and a tank top? "_"

 

I used to do a turbo cool down religiously on my '90 Eclipse GS Turbo. It had an intercooled turbo, but since it was the first intercooled unit to hit the mass market, Mitsu recommended doing a cool down after each run, just to be on the safe side. Prior to the Mitsu intercooled turbo (which we have in our cars) turbos were notorious for heat-related bearing failure. It's not only the improved additives in found in conventional and synthetic oils that makes the difference; having an intercooler cools the whole system to some degree.

After buying the 03 WRX I called Subaru USA and asked them about the cool down because I didn't find anything about it in the driver's manual. They told me it wasn't necessary to do a cool down unless the car is just winding down from a hot run. Common sense needs to apply here. If you think your turbo might still be glowing cherry red then it makes sense to cool down those turbo bearings a little before shutting down. If I run boost sometime during the minute or so before shut-down, I'll let the engine cool down for maybe 30 seconds. A little longer for a really hot run.

 

It's not the intercooler that negates the need for a TT, it's the fact that the turbo has a water jacket around the bearing that uses engine coolant to carry heat away, even after the engine has stopped. Older turbos (and some current ones) that are oil-fed only will lose all of their ability to transfer heat once the engine is shut down, these can benefit from a TT.

 

Nice new information.....

 

exactly. i had a t3/t4 turbo in my integra and it was a MUST to let it cool down.

 

t3/t4 is oil only, right? No water cooling for that.....