<VV> turbocharger cooling

[Dale Dewald]

Turbo owners,

A fairly simple addition of an exhaust temperature gauge will take the 
guesswork out of shutting down a turbocharged engine.  This was one of the 
first accessories I added to the Cummins turbodiesel in my 2001 Dodge 
truck.  I just wait until the EGT gauge registers 300F or less before I 
shut down the engine. This is fairly easy for my wife or some other person 
who borrows the truck to understand. For light, easy driving the EGT may 
reach 300F right away.  If I have just hauled my neighbors' 8500# skid 
steer + trailer up the 8% hill near my house then it may take 5 minutes or 
more.

Shortly after we purchased (used) our 1985 Jeep Cherokee with a 2.1L 
Renault turbodiesel the center bearing in its Garrett T2 seized up--the PO 
had not followed the owner's manual recommendations for idle shutdown. I 
had that turbo rebuilt with a water cooled center section and it has since 
gone 150K as if still new.

Dale Dewald
Hancock, MI

>In a message dated 5/27/2009 9:45:41 P.M. Pacific Daylight Time,
>dave.thompson at verizon.net writes:
>
>I just  shut down when I stop. I
>use my CHT to determine if I need to idle before  shutdown. Of course, if I
>had just jumped on it to get some boost, I let it  idle or drive moderately
>for a few blocks before shutdown.
>
>With the  string that is going on here I wonder if I should idle for a
>minute
>or so  before every shutdown. What are you guy's opinions on my current
>procedure?  Should I modify it? If so, How?

  Then at 12:00 5/28/2009 -0400, Seth wrote:

>"Turbo Power" company used to make a shutdown cooler kit, it included  a
>small electric oil pump, a temperature sensor and a shuttle valve. After the
>engine shuts down, if the controller senses the temp in the turbo exceeds a
>certain level, it starts the pump. The pressure pushes the shuttle valve
>closed  and then pushes a small amount of oil through the turbo to keep some
>cooling  going on. The oil returns to the sump via the stock drain. When the
>sensor reads  the turbo has cooled past the set limit, it turns off the pump
>and the shuttle  valve returns the feed to stock. If more heat soaks into
>the turbo and the temp  comes up - the controller turns the pump back on to
>cool it. The kit was very  popular with SAAB owners in the late seventies and
>eighties.  Turbo Power  no longer sells the kit. They sold the complete
>product line to another company.  I will try to find out the current 
>supplier -
>if someone is still selling  it.
>