Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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 Posted: Thu Sep 02, 2010 1:42 pm Post subject: Oil Temp issues |
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I was working with an RV-7 owner on finding the cause of his high oil
temps(220+) today. He had IO-360 parallel valve engine built from an
ECI kit, including an ECI oil filter adapter that put the filter at a
45 degree angle. What we found was a bit surprising. The stock
Lycoming filter adapter has both the Vernatherm valve and seat in the
adaptor. The ECI, which is FAA/PMA approved has the vernatherm in the
adaptor, sealing against a seat on the accessory case. The stock
Lycoming filter adapter gasket precluded 3/4 of the radius of the
vernatherm from seating at all. You could see where it had pressed
against the gasket, and less than 10% of the vernatherm nose had any
mark from seating on metal. Thus it was always allowing some of the
oil to bypass the oil cooler. It took some sleuthing to determine that
the offending part of the gasket could be cut away without harm.
Hopefully I will know in a couple days how much difference this makes.
Talked to a major engine shop, they had never seen this adapter
before. Talked to local FBO, they had seen it, but had nothing but
stock Lycoming gasket, like the one causing the problem.
Just a caution that just because all of the parts were approved for
use on a certified engine, does not mean they will work in harmony
with each other.
Kelly
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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD |
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