If your rotary is over heating on take off and you need to get back
on the ground right now consider using one of these small high
pressure pumps to spray water on the rad.


For the time to climb air plane I bought two. One for the rad spray
bar and one for water injection into the intake manifold.

Easier than just using one and a selector valve.

Paul Lamar


I wish I could use one of these for the rear engine oil cooler on my
C337 for those hot days with long holds prior to takeoff!  A few
times I have had to shut the rear engine down and taxi back to
prevent temps redline.  I doubt my mechanic/IA would agree this
would be a "minor modification/repair".

Scott Gettings Sent from my iPad using Voice.  Apologize for typos


Take it off when you get an annual :-)

What a coincidence. Peter Garrison contacted me with his oil
overheating on his Melmouth Continental.

Make sure the oil cooler does not "see" an exhaust pipe.

Paul Lamar


As usual, you're right. The Oil cooler looks right at the exhaust header and is 8 inches away. I'm sure I can get my mechanic to agree to a heat shield as a minor modification.

Thanks very much!

Scott Gettings

Use .040" or .050" thick SS about 1/4 inch away from the pipe so the oil cooler cannot
"see" the exhaust pipe. SS has low  heat transfer characteristics.


Paul Lamar

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