cooling off wrx

[GaryG44104]

I have a 04 WRX and love it. I think my dealer told me I should let it run
to cool off, I take it after more than a short trip. Does this mean with
the engine running or just the fan?

 

[Edward Hayes]

General rule for any engine that is run heavily loaded should be idled for ~
one minute before shutdown. That lets the exhaust valves cool and the
turbocharger wind down while it has oil and water circulation. eddie

 

[Jon]

Grats on the car, go easy on the tranny and follow the recommended break-in.

A good source for question/discussions www.nasioc.com/forums

 

[David Betts]

I have a 04 WRX and love it. I think my dealer told me I should let it run
to cool off, I take it after more than a short trip.

Check your handbook, but as far as I aware this is not necessary from
the bug-eye cars onwards. which do not rely on oil circulation to cool
the turbo. The earlier cars have an advisory sticker on the inside of
the driver's door. Mind you, I'd be tempted to let it run on for a
minute or so if stopping straight after a period of hard driving. In
most cases, of course, you'll have been dawdling for a bit in local
streets before parking up, so no need.

David Betts
(e-mail address removed)

 

[Edward Hayes]

Oil pressure IS required to protect the bearings during spindown.

 

[David Betts]

Oil pressure IS required to protect the bearings during spindown.

Of course, but that's not the reason for the one-minute idle
requirement on the pre-bug eye cars. You'd have to shut down an engine
remarkable rapidly for oil pressue to fall before the turbo had
stopped spinning <g>

David Betts
(e-mail address removed)

 

[Mark]

Check your handbook, but as far as I aware this is not necessary from
the bug-eye cars onwards. which do not rely on oil circulation to cool
the turbo. The earlier cars have an advisory sticker on the inside of
the driver's door. Mind you, I'd be tempted to let it run on for a
minute or so if stopping straight after a period of hard driving. In
most cases, of course, you'll have been dawdling for a bit in local
streets before parking up, so no need.

David Betts
(e-mail address removed)

Correct me if i'm wrong...

I have a 02 WRX. I was told that since the turbo is water cooled (not
oil) and the turbo sit's lower than the upper most water level, it is
always surrounded by coolant and will not develop the "cooking" of the
turdo bearings.

So in essence you don't have to cool down the turbo. However, on my
last turbo charged car (91 Plymouth Laser) I had to replace the turbo
after only 60K miles. Thank god for the Plymouth 7/70 warentee. The
part alone was $1000. I always give the turbo about 1 minute cool
down.

In one of the aircraft I used to fly (Cessna 310) was twin turbo
charged. We were required to have a 5 minnute cool down period. But
we flew at a much higher boost pressure. I have to say it was cool to
look into the engine vent's when flying at night and seeing thoes
turbos cherry red!

 

[Philippe Javaux]

Cessna 310 twin turbo really? The Cessna 310 is normally equiped with single
turbo engine ( TSIO-520). What is that mod?

Check your handbook, but as far as I aware this is not necessary from
the bug-eye cars onwards. which do not rely on oil circulation to cool
the turbo. The earlier cars have an advisory sticker on the inside of
the driver's door. Mind you, I'd be tempted to let it run on for a
minute or so if stopping straight after a period of hard driving. In
most cases, of course, you'll have been dawdling for a bit in local
streets before parking up, so no need.

David Betts
(e-mail address removed)

Correct me if i'm wrong...

I have a 02 WRX. I was told that since the turbo is water cooled (not
oil) and the turbo sit's lower than the upper most water level, it is
always surrounded by coolant and will not develop the "cooking" of the
turdo bearings.

So in essence you don't have to cool down the turbo. However, on my
last turbo charged car (91 Plymouth Laser) I had to replace the turbo
after only 60K miles. Thank god for the Plymouth 7/70 warentee. The
part alone was $1000. I always give the turbo about 1 minute cool
down.

In one of the aircraft I used to fly (Cessna 310) was twin turbo
charged. We were required to have a 5 minnute cool down period. But
we flew at a much higher boost pressure. I have to say it was cool to
look into the engine vent's when flying at night and seeing thoes
turbos cherry red![/QUOTE]

 

[Orion]

I have a 04 WRX and love it. I think my dealer told me I should let it run
to cool off, I take it after more than a short trip. Does this mean with
the engine running or just the fan?

If it matters I have had 2 CELs and both times were for a misfire in
cylinder 3. The dealer told me that's the one nearest the turbo and that
not letting it cool down may cause the misfire. I normally let the car cool
down for the minute, but on both occasions it happened after I did not. May
be coincidence, but ever since I let it cool down for at least the minute
every time and haven't had it happen again. Either way, doesn't hurt,
unless you're that anal about wasting gas For less than a hundred bucks
you can get a turbo timer that will let you take the keys out and lock the
car (and arm the alarm) but still keep the engine running for a
pre-determined time (or in some cases a time determined by how hard the car
was driven).

Just my 2 cents.

A

 

[Mark]

Cessna 310 twin turbo really? The Cessna 310 is normally equiped with single
turbo engine ( TSIO-520). What is that mod?

Twin turbo ment 1 for each engine.. Sorry, that was lazy
typing/explaining.

I actually flew (about 6 years ago) a C310R with RAM engines and q-tip
props. We then added the vortex generators to the wings and it really
help the low speed handling. We typicially flew with all tanks (plus
locker tanks) full of fuel (202 gals). With all the fuel and camera
gear we were a little over gross.

Ever try landing a 310 without using ANY flaps? Did it once.. damn
thing just droped out of the air when we were about 3 feet above the
runway. OUCH