REFLECTOR: oil cooler issues

[Scott Derrick]

255 is not running hot, thats smoking!  You gotta get that down.  My 
rule of thumb is to change the oil if it ever gets above 250. The most 
likely culprit is leaking baffles around the engine.  My engine ran hot 
until I got really really anal about sealing the baffles.  No hole 
allowed greater than 1/4 inch, no seam greater than 1/32 inch. no holes 
and totally flush is best.  I also installed turning vanes in the oil 
cooler duct. Be sure the oil cooler-to-duct interface doesn't leak at 
all. If your engine is fuel injected and you have an all cylinder egt 
gauge you may consider trying to run LOP. Your engine will run 25/50 
degrees cooler vs. running ROP at the same HP setting.  You may need to 
play "swap the injectors" game to get the cylinders balanced enough to 
run LOP.

I had a cold airplane in the winter.  Mainly due to two reasons. 
Inadequate sealing of the nose gear  mechanism and using the nose oil 
cooler as the cabin heater.  When its -20 outside, the nose oil cooler 
as a cabin heater is trying to raise the temperature at least 100 
degrees, 120/140 would be better if the plane is cold to start with. It 
just can't do it.

I have a internal oil heated cabin heater now that will recirculate the 
cabin air which should be able to roast us alive.  Its not flown yet so 
can't say if y design works well or not.

Scott

Tom wrote:
> Hi, I'm a new Velocity owner and had a few issues while flying it home. 
> One was that there was an oil cooler leak, I've removed and will 
> pressure test today to determine if it's indeed the cooler or just 
> fittings. In looking at it I noticed that it utilizes inlet and outlet 
> on same (side) tank. Won't a lot of the oil just pressure right through 
> at 75psi and not fall through the cooling lines/fins?? Is this a normal 
> set up or poetic license by builder? It does run too hot (225 in cruise) 
> and does not have a 2nd cooler. The cooler is an SW10557A which I can't 
> seem to locate either as far as replacement if I need one. What are most 
> folks using?? thx much Tom/Fort Myers
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