Welcome to the North American Subaru Impreza Owners Club Tuesday September 23, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Electrical & Lighting

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 01-08-2003, 06:24 PM   #1
merlot
Scooby Specialist
 
Member#: 16935
Join Date: Mar 2002
Chapter/Region: Tri-State
Location: Woolwich Township, NJ
Vehicle:
2012 Volvo S60 T5
2013 VW CC R-Line

Question So a Subaru mechanic tells me I should buy a Turbo Timer...

I was at the dealer today having something checked out, and in casual conversation the mechanic asked if I let the car idle after driving hard. I said no, I've read it's not needed.

After telling him I read a document from Subaru (does someone have the link?) about the how turbo still cools down after the engine is off, he and the service writer joked about how I got the info from the internet and most is not reliable. His reasoning was if the car isn't running, the oil pump is pumping oil and the water pump is pumping water, so how could the turbo get cooler.

I wish I was more techincally inclined and could remember extactly what the document contained. I'm sure someone here has a copy or the link at least. I'd like to print it out and bring it to them next time I'm there.

One part he did seem to know was to wait till 10,000 miles for synthetic... exactly what Subaru told me when I called them.

Any thoughts?

MSD
* Registered users of the site do not see these ads.
merlot is offline   Reply With Quote
Old 01-08-2003, 06:37 PM   #2
pegdrgr
Scooby Specialist
 
Member#: 25693
Join Date: Oct 2002
Location: Portland, Or
Vehicle:
2008 18x9" goodness
E85-380ftlbs @ 3100

Default

Due to a small reservoir above the turbo you do not have to wait for it to cool down completely, however it will not hurt to use a turbo timer, or let the car cool down. The mechanic is probably not that familiar with the WRX and just being cautious. I would view his comment about the TT as generically good for turbo cars, not necessarily ideal for yours.
pegdrgr is offline   Reply With Quote
Old 01-08-2003, 06:42 PM   #3
merlot
Scooby Specialist
 
Member#: 16935
Join Date: Mar 2002
Chapter/Region: Tri-State
Location: Woolwich Township, NJ
Vehicle:
2012 Volvo S60 T5
2013 VW CC R-Line

Default

Thanks for the reply... I found what I was looking for

http://www.subaruwest.com/PDF_files/...1_techtips.pdf

MSD
merlot is offline   Reply With Quote
Old 01-08-2003, 06:56 PM   #4
SuicidalLabRat
Scooby Specialist
 
Member#: 4096
Join Date: Feb 2001
Location: Constantinople
Vehicle:
noun [ ve·hi·cle ]
a carrier,as of infection

Default

"2002MY WRX TURBO COOL DOWN PROCEDURE
FHI's posistion regarding this is that it is not necessary to perform a "cool down/idling" procedure, as was recommended with past turbo models. Our current 2.0L turbo engine has a far greater cooling capacity and, coupled with technology advances, makes this practice no longer necessary. This explains why information about cool down is not included in the 2002MY Impreza Owner's Manual.

The heat contained in the turbo charger will begin to vaporize the coolant at the turbo charger after the engine is stopped. This hot vapor will then enter the coolant reservoir tank which is the highest point of the coolant system. At the same time the vapor exits the turbo charger, coolant supplied from the right bank cylinder head flows into the turbo. This action cools the turbo charger down. This process will continue until the vaporizing action in the turbo charger has stopped or cooled down."




SLR-
SuicidalLabRat is offline   Reply With Quote
Old 01-08-2003, 07:48 PM   #5
warlord225
Scooby Newbie
 
Member#: 24729
Join Date: Sep 2002
Location: New Zealand
Vehicle:
1993 Legacy gtb- sti
black wagon

Default

what about the oil though?
i know the turbo uses oil as a bearing, so essentially by not idling the car down you are "cooking" the bearing due to the fact that the oil is sitting on a very hot surface, just look at an egg frying in a pan of oil.
warlord225 is offline   Reply With Quote
Old 01-08-2003, 07:53 PM   #6
lstepnio
Scooby Specialist
 
Member#: 10972
Join Date: Oct 2001
Chapter/Region: South East
Location: Tampabay, Florida
Vehicle:
2004 STi (fuxor3d!!)
2004 Forester X

Default

I was under the impression that the oil drains out of the turbo once the oil pump stops.
lstepnio is offline   Reply With Quote
Old 01-08-2003, 09:13 PM   #7
LyveWRX
Scooby Specialist
 
Member#: 19057
Join Date: May 2002
Chapter/Region: MWSOC
Location: Milwaukee Jct., Detroit, MI
Vehicle:
2002 WRX
& Red Ford 1-ton Van

Default I hope not....

"I was under the impression that the oil drains out of the turbo once the oil pump stops."

I hope not all of it, darn that would be bad, the thin film left would definately coke during heat soak, and then there would be metal on metal for startup....

Nick
LyveWRX is offline   Reply With Quote
Old 01-08-2003, 09:51 PM   #8
Chrisnonstop
Scooby Newbie
 
Member#: 13083
Join Date: Dec 2001
Location: Marin County, CA. USA
Vehicle:
2002 WRX Sedan
Silver

Default 36K miles so far no problems

I drive 100 miles a day to and from work (Marin to Livermore, ca). During this trip the RPM speed averages about 3400 - 4000 depending on how fast i'm going. Usually about 85MPH. The fastest is around 110 (0520hrs with nobody on the road). This has been done 5 days a week since I got the car about 14 months ago. So far there has been no loss of power, and no odd noises. I do let the car idol for 30 seconds before shutting it off. Only because the mechanic at SUbaru told me to do this to help avoid throwing any CEL's. This was back when I was using cheap gas and kept throwing CEL's. We were a little stumpt as to why I was throwing the CEL's so the mechanic said, Use good gas, & let the car idol 30 seconds before shutting it off. I guess a TT would be good if it was a track car and for some odd reason you liked to race it near red line all day, come to a screaching hault and shut the engine off...just kidding.

Honestly though, it's been 36K miles, if my turbo was going to cook the oil it would have done it already. When I hit 80K miles post another message here to let the masses know if my turbo burnt up yet. If it hasn't by then, that's gotta be proof you don't need a TT. Unless your the type of drive described above and torture your car. Then not only do you need a TT, you also need a psychiatrist....

Chrisnonstop is offline   Reply With Quote
Old 01-08-2003, 11:38 PM   #9
SuicidalLabRat
Scooby Specialist
 
Member#: 4096
Join Date: Feb 2001
Location: Constantinople
Vehicle:
noun [ ve·hi·cle ]
a carrier,as of infection

Default

Where did this impression that turbine idle down is to cool the turbo? The necessity of settling the turbo is to allow the impeller to slow to idle while its flow oiled; if you are not on boost for a minute or two before stopping, i.e. you may have been running it hard on the freeway, you exited and cruzed the few blocks to your house before cutting the engine, then there is no need for a TT regardless of whether your turbo is glowing or not. You arent bringing a 1700 F housing down to some magic safe temperature by not boosting for a thirty second TT session, its an iron e-side, it holds heat pretty well. The suby voodoo post stall cooling mechanism seems to be more to cool quicker and offset coking.



SLR-
SuicidalLabRat is offline   Reply With Quote
Old 06-14-2006, 01:58 PM   #10
biogon
Scooby Newbie
 
Member#: 117544
Join Date: Jun 2006
Default

I know this is bring up a REALLY OLD post.

I've been driving my '05 WRX for a while now and worried about the turbo. A friend of mine with an old Supra TT always was a big proponent of his turbo timer.

So I called the Subaru dealer I bought my Woobie from and asked their service people.

Their reply?

"Let it cool down by idling for 10 minutes every time you drive it."

Oh, thanks.

Right.

You guys are the best.
biogon is offline   Reply With Quote
Old 06-14-2006, 02:05 PM   #11
offset
Scooby Guru
 
Member#: 32636
Join Date: Feb 2003
Chapter/Region: MWSOC
Location: Dayton, OH
Vehicle:
2004 Impreza STi
Silver/Silver

Default

Please make sure to avoid that Subaru dealership for service then.

offset
offset is offline   Reply With Quote
Old 06-14-2006, 05:13 PM   #12
sedanman10
Scooby Specialist
 
Member#: 112948
Join Date: Apr 2006
Chapter/Region: SWIC
Location: Mesa, AZ
Default

^^^^^^^^^^^^^wise words. If something ever goes wrong with your turbo, your car is telling you that its bored and time for an upgrade!
sedanman10 is offline   Reply With Quote
Old 06-14-2006, 07:15 PM   #13
Spooled
Scooby Specialist
 
Member#: 14958
Join Date: Feb 2002
Chapter/Region: VIC
Location: Vancouver, BC
Vehicle:
1991 318is
Silver

Default

if the turbo was oil-cooled then you'd be advised to use one. i used to have one mainly for the bling factor, but i sold it since it's not necessary. used that money for bushings!
Spooled is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
my subaru project tell me what u think so far. slapaho_ca Member's Car Gallery 21 09-07-2006 09:29 AM
Tell me not to buy a 4-Runner this weekend MeddlingKids Off-Topic 15 04-22-2005 04:40 PM
Should I get Turbo-Timer and Turbo Guage? raptor Factory 2.0L Turbo Powertrain 7 12-04-2003 04:33 PM
Tell me what to buy. KarZoned Normally Aspirated Powertrain 3 08-03-2001 02:53 AM
electrical or mechanical?? tell me.... subywan-kenobi Factory 2.0L Turbo Powertrain 4 04-18-2001 08:50 PM


All times are GMT -4. The time now is 08:09 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.