The preoilers oil everything except the cam and lifters. The Ney nozzles
spray oil directly on the cam and lifters but not until there is oil
pressure. Neither one is the answer to the Lycoming cam problem but the two
together probably are. You would still want to preheat though to be sure
the oil was thin enough to get onto the cams.

--

Roger Long



"Jay Honeck" wrote in message
news:_Uykd.324061$wV.233990@attbi_s54...
The faster a good oil film gets established on the cam, the less chance
there is of lifter damage. Anything under 60 degrees carries some risk.
We preheat below 40. A single cold start when it is really cold can
damage a lifter.

Which always leads me to this same question: Does anyone here have a
"pre-oiler" installed in their airplane?

It would seem so logical, yet I've never met anyone with one installed
(other than on big warbird engines...).
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"