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Old 05-06-2005, 11:49 AM   #1
jmin
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Member#: 85485
Join Date: Apr 2005
Default turbo cool off?

Good Morning

I'm about to leave to pick up my 05 wrx wagon and i have a couple of questions.

1. Is it necessary to warm up and/or cool off the turbo before shutting the engine off- I had to do that with my Saab turbo to prevent the housing from damage?

2. Any suggestions for breaking in the engine aside from the 4000 rpm limit for the first 1000 miles and varying the rpms?

Thanks I just wish the time would pass a bit more quickly so i can start driving my new baby!!!!
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Old 05-06-2005, 11:59 AM   #2
DarkShadow
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Join Date: Apr 2002
Chapter/Region: TXIC
Location: Little Elm
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2009 Toyota Tundra

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You do not need to run the car before shutting it off to help the turbo. The design actually draws the oil and water up the lines as it cools. I have 65k on my turbo and almost never let the turbo cool down before shutting down the car. I only do it when I run really hard.
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Old 05-06-2005, 12:05 PM   #3
MrH00nel2
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Join Date: Jan 2005
Chapter/Region: South East
Location: La Vergne,TN
Vehicle:
2002 Z06
1200whp

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i wouldnt worry about it. the car is new your gonna break it in slow. no need to let it cool off. its stock its not gonna create enough heat to cause damage.

but always let your engine get to operating temp before doging it. later when you get more mods on your car get a turbo timer and dont worry about sitting there letting it idle, the turbo timer will do it for you then turn off the car too
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Old 05-06-2005, 12:07 PM   #4
MrH00nel2
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Join Date: Jan 2005
Chapter/Region: South East
Location: La Vergne,TN
Vehicle:
2002 Z06
1200whp

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and i forgot but DarkShadow said it. the design of the cars engine/turbo actually recirculates the oil when the car is shut off, so again dont worry about it
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Old 05-06-2005, 03:54 PM   #5
phantomsr
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Location: Edmonton
Vehicle:
2002 Stg2-WRX Wagon
WRB & Dust

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I wouldn't bother wasting your $$ on a turbo timer unless you like pulling into parking lots under WOT. If you drive sane for the lest bit of your drive a cool down is not required. You're really just wasting fuel. The only benifit of a Turbo Timer is if you want to leave the car running while you jump out for a few minutes and don't have remote start. Then you set it for 5 or 10 minutes and it's still running when you get back. Save the $$ for something else.
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Old 05-06-2005, 05:10 PM   #6
AndyH
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Location: Minneapolis, MN USA
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2005 STi WRB/Gold
2005 S4 Avant

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An engine break-in thread isn't complete until someone posts a link to this procedure:
http://www.mototuneusa.com/break_in_secrets.htm
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Old 05-06-2005, 08:00 PM   #7
dcwrx2
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'04 4EAT Wgn
WRB

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Read the Owner's Manual, follow what it said about breaking-in the engine, and that's good enough. Aside from that 4kRPM limit, try drive with varying speed but not keep at same speed (i.e. absolutely no cruise control, hehe)
About fully warming-up the car before drive, most owner's manuals say you don't need to do that. My opinions are, once you started the engine, you can start driving it after you did regular checks (mirrors, seatbelt, sunglasses, stereo, sitting posture) which take less than 30 second. Shift gears as normal BUT try to keep you car under 35mph for the first couple minutes (2-3 minutes are ok). Then keep under 50mph for the rest of the time until the water temp reached normal.

Many people (my cousin does that...) would sit inside the car, idling for like 8-10 minutes until *confirmed* the water temp is normal, then begin to drive. But please keep in mind, water temp is water temp, it is the temperature of water but not the engine internal parts. Without doing detail research, my rough guess is after the 1st minute the engine started, the internal moving parts such as pistons, piston rings, combustion chamber, are already getting warmed. Although not "fully-warmed", this temperature should be good enough for <35mph driving (while keeping RPM at normal level for normal gear shifts). Now, here is an important note: While you're driving at this low speed, you are also warming up the other systems such as transmission, power steering, brake, and the cats (for those environmental fans). By the time you gradually increase your speedlimit to 50mph and water temp eventually reachs normal, the other components must have reached their normal temperature too.

In contrast, some people who waited so long to confirm the *water temp* reached normal, they may start moving the car at once, but drive like as if on racetrack, revving to redlines etc. However, they didn't realize the other components didn't get warmed up (as much) while the car is idling. Unless these people are driving like what I said above (slow for first couple minutes), otherwise they are still doing premature damages to the other components.
If you are living in very cold areas, you can add few more minutes to warming up the engine, but I don't think more than 5-minutes idling in any situation will do any good to your car. Just my $0.02.
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