Today's Message Index:
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1. 06:27 AM - Re: 582 Overheating (mikeperkins)
2. 01:39 PM - Re: 582 Overheating (Patrick Reilly)
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| Subject: | Re: 582 Overheating |
Hi Jared,
My 532 on a hot day might get to 170 while taxiing. I have a 140-degree thermostat,
no airscoop, and a small, plastic-bottle reservoir. I get about 12 oz of
expansion coolant into the reservoir during normal operation.
If you need a larger reservoir because of coolant overflow, it might be a steam
pocket in the head. That can be eliminated by bleeding the air completely from
the head. I have to tip my airplane about 20 degrees nose-low with the cylinder
head bleed port open. The reason for all the gymnastics is because when the
plane is parked the top of my coolant filler is below the highest point in the
cylinder head. So without tipping the nose down, the coolant would never reach
the highest point of the cylinder head. If steam builds up in the head because
of an air pocket, the engine will overheat. It's happened to me.
The only other thing I can think of is that your radiator is caked on the inside.
I'd also think about a 140-degree thermostat. Maybe try removing the thermostat
as an experiment.
There are actually places for two thermostats. The other is on the lower part of
the crankcase where the hose connects. It's claimed it helps keep the temperature
steadier, but I've never known anyone to use it - sounds like just one more
component to fail.
--------
Mike Perkins
Havana, Illinois
Model I, 532, B gearbox, GSC prop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=427052#427052
Message 2
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| Subject: | Re: 582 Overheating |
Jared, Where are you located? I have the oversized radiator 8" x 20" that
came with a firewall forward 582 that I purchased from S CA. I imagine it
had been flown in the S CA desert. I originally didn't know it was over
size. But, realized that before 1st flight. I would tape off 1/3 of it in
the summer and 2/3 in the winter and got the desired temps. It was mounted
on 1 1/2" spacers pushing it down into the wind from the belly. I recently
replaced it with the 4" x 20" standard radiator and get 170 to 180 degree
temps in 80 degree ambient air. I do have a thermostat .....can't remember
what temp.
If you aren't running in extreme hot ambient conditions, the standard 4" x
20" radiator should give you adequate cooling if everything else is correct.
Pat Reilly
Mod 3 582 Rebuilt
Rockford, IL
On Mon, Jul 21, 2014 at 1:39 AM, Michael Gibbs <michaelgibbs@cox.net> wrote:
>
> I had the same experience with my 912S. Ran fine without the scoop but
> overheated within minutes after takeoff with it installed. Never got to the
> bottom of the issue, just left it off.
>
> Mike G.
> Phoenix, AZ
> Kitfox IV-1200 Speedster, Series 6
>
> > On Jul 20, 2014, at 8:49 PM, Guy Buchanan <gebuchanan@cox.net> wrote:
> >
> >
> > With my 582 I had to pull the scoop and lower the radiator 1". Otherwise
> I couldn't taxi without overheating. "Stock" radiator. (Probably 4x20) No
> reservoir. 180 thermostat. I also was very careful to insulate the water
> pump line from the exhaust heat.
> >
> > Guy Buchanan
> > Ramona, CA
> > Kitfox IV-1200 / 912-S / Warp 3cs / 500 hrs. and grounded
> > Now a glider pilot, too.
>
>
--
Pat Reilly
Mod 3 582 Rebuild
Rockford,IL
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