Dave, I don't think the fans are activating at low, medium and high
speeds like they should be. I jumped the wires that plug into the
coolant temperature sensor on the passenger side of the radiator and
both fans function properly at low and medium speeds. When I start
the vehicle and let it warm up I have not witnessed the fans activating
on low, medium and high speeds. If the fans function properly but they
do not activate when the vehicle gets hot, does that mean I have a bad
coolant temperature sensor?
--- In ev_update@..., "dave_king_ev" <dave_king_ev@...>
wrote:
I didn't ask the question clearly, or you didn't answer clearly, or
both. Let's try again:
The fans have three speeds. Low, medium, high. They always run
together (eg, both low, or both medium, or both high, or both off).
Does that describe your fans?
--- In ev_update@..., "campbellmeister"
<campbellmeister@> wrote:
Hi Dave,
I dont think my fans are running at different speeds. It seems
like
they are only running at a single speed. Both fans are
opperating at
the same speed. Any advice for testing the multiple fan speeds?
--- In ev_update@..., "dave_king_ev" <dave_king_ev@>
wrote:
If your radiator cap is leaking you'd know it. It's sealed by
a
big
o-ring (over 1" diameter) in the well of the overflow tank.
The
o-ring seals long before the cap is screwed down all the way.
Either
the tank holds pressure or it doesn't. Don't waste your time
on a
new
one unless you notice the tank failing to hold pressure.
Do the fans always run together? Do they change speeds? What
are
your observations?
--- In ev_update@..., "campbellmeister"
<campbellmeister@> wrote:
--- In ev_update@..., gti_matt <gti_matt@> wrote:
--- campbellmeister <campbellmeister@> wrote:
Hello All,
I recently purchased an EV GL with 90,000 miles on it
and I
am
loving
this thing. Unfortunately I am having an issue with the
cooling
system.
At random times while driving on city streets, the temp
light
begins to
blink and the temp gauge needle begins to climb. The
needle
does
not
climb all the way to the top of the meter but it gets
close
enough to
make me concerned. Like clockwork, the light stops
blinking
and
the
needle begins to plummet back to normal operating
temperatures.
My
cooling fans are operational and there is fluid in my
overflow
reservoir. I was thinking that this might be a sticking
thermostat. Any
advice would be greatly appreciated.
I'm not overly suspicious of the thermostat myself. T-
stats
usually fail in one of two
ways...either fully open (engine usually never fully warms
up
unless car isn't moving and is
idling but cools down...way down...after car is moving
again)
or
it sticks fully closed, in which
case the car would overheat and the fans would usually not
come on
since the water in the radiator
is still cool and isolated from the hot engine circuit.
It might be a thermostat if it's opening, but just not
fully
opening and therefore only partially
restricting water flow, but I've never really seen them
fail
that
way myself.
I would instead suspect the lower-speeds fan circuit.
Although
you said the fans are coming on,
are they coming on only in the highest speed? That might
be
the
case...the lower speeds aren't
happening and so the coolant heats up and only the highest
speed,
triggered by the thermoswitch
sensing the coolant getting very hot, so that's why you
see it
get
close to overheating.
Thanks for your responses. I will go agahead and try the new
radiator cap. As for the fan speeds, I am not totally sure
how
to
check the fan speeds. I know that when the AC is running the
fans
are both operating at the same speed. Do you know a simple
way
to
check the fan speeds? I've read about a way to close the
circuts
on
certain sensors and the fans will operate at different
speeds.
I'll
probably go through those checks this weekend unless someone
has
an
easier way to check the three fan speeds.
