Hi Ron
When I purchased my 97 Dak 318, I complained to the dealer about starting my
truck up first thing in the morning. The mechanic said ya the fan sounds
like a jet engine for a few miles when cold, then it should stop.
But when fully up to normal operating temperature (when the noise should
stop), I can still hear it coming on and off once in a while, especially
when shifting up or down (5 speed).
Even when cruising at 60 to 70 miles per hour the odd time you can hear it
make noise on and off, is this normal? The DC mechanic says that it is.
But it doesn't seem right to me. The extra "noise" means a drain on
horsepower doesn't it?
Thanx
Jay Friedrich
>Ronald, This is just my problem, My engine fan doesn't engage at all in
>driving or in traffic, the only time I have my engine fan to engage is on
>cooler mornings.I would go out and crank up my truck and leave it for 10-12
>minutes idling to warm up.When I would pull out of my drive, I would wind
>the motor up to 2000 rpm and shift.At that point, the engine fan disengaged
>and I never heard it again.Since it has been real hot, I don't even get it
>first thing in the morning.
>
>Will Coughlin willcoughlin@hotmail.com
>>
>>I don't know if this is just symptomatic on the 5.9's or it goes through
>>the
>>entire range of Dak engines but there is a TSB on it. The TSB doesn't fix
>>anything. It just makes dealers and ultimately, customers aware that the
>>fan does sound pretty loud when the clutch engages and that there is a
>>feeling of a loss of power when the clutch engages. When I first felt it
>>in
>>my Dak, I thought I was losing my tranny. Now, I've grown accustomed to
>>it.
>>When does it happen? It doesn't happen on a cold morning, however, it
does
>>happen after I have driven somewhere, shut the truck off, come back out
>>several hours later, and start the truck again. Why? During the period
>>that the engine was cooling down, the ambient temperature under the hood
>>went high enough to cause the fan to engage as soon as I started the
truck.
>>As soon as I started moving and the ambient temperature went down the fan
>>shut off and I was fine. The other time the fan engages is the obvious
>>time, when you're moving in stop-and-go traffic and the temperature is
very
>>hot outside. The thing I hate the most about this fan is the amount drag
>>it
>>causes on the engine. It feels like I'm losing about 30 hp and when
>>starting from a dead stop almost feels like I'm starting in second. If
you
>>get up in the morning and it's cold out, but your fan engages it could
mean
>>that the temperature under your hood got warm enough when you shut it down
>>the night before that the switch connected. As soon as you start moving
in
>>the morning your fan should disengage.
>>
>>Ron
>
This archive was generated by hypermail 2b29 : Fri Jun 20 2003 - 11:54:27 EDT