Engine Hoses

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AGING AND HEAT DAMAGED HOSES

There’s been much written about changing out oil and fuel hoses that have reached 6 or 7 years old.  Hoses need to be well supported and tied down so they do not shake around or chafe against anything.  They should also be protected against heat damage.

A couple of years ago Phil Lenyer made a lucky successful dead stick “night” landing in a field after an oil hose burst due to being too close to the exhaust system.

A couple years ago in Texas a Stinson made a force landing on a highway after an aging oil psi line burst.

Here in California a few years back a Navion made a force landing in a field after an well-aged oil line burst.

More recently I received a call from a good friend and club member, Earl Myr.  Earl told me he’d come very close to running his Stinson out of oil.  Sometime during a 20 minute fight a oil hose burst and let all but about 2 quarts of oil out all over the belly of his Stinson.  This hose was only 3 1/2 to 4 years old.  It apparently got heat damage by passing 4″ from the exhaust system on the way to an oil filter.

There have been a number of reports about oil hoses being too close to the exhaust system on the Seaplane Inc. or Turbotech oil filter conversions.  These oil filters were mounted either on the left side of the firewall or left side of the engine mount.

If you have any hose, oil or fuel, closer than 6″ to any part of the exhaust, you should check it to be sure it’s still flexible or otherwise in good condition.  I also recommend placing fire sleeving on any hose 6″ or less from the exhaust system.

If any hose is over 6 or 7 years old or you can’t determine how old they are, get them replaced, call it cheap insurance!

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