Mark and Keith,
Although swapping the top and bottom isolators is one technique, the
isolators used on the 320 are symmetric from front to back and can just be
reversed in place. Also, the steel center bushing of the
top isolators can be shortened (around .1") as was mentioned elsewhere
(just the top is necessary). If washers are needed for the bottom, they
can be made from old isolators by stripping off the rubber..
However, the best thing to do is to cut a slot in the washer all the
way to the center and the same size as the center hole - this way, one does
not have to remove the lower bolts, just loosen the nuts and slip the 1/8" thick
washer in between the engine and the isolator and retighten the bolt (you may
want to remove some of the spacing washers so the number of grip
threads is the same).
A mechanic I talked to recently said that the aft bottom and the top
forward rubbers should be of harder material...... I am investigating this
for future use.
BTW, I have shimmed out the bottom using two washers or 1/4" ( I had
to use a longer bolt).since the engine had sagged and the cowl lifted up so
much in flight that the exhaust pipe was bumping against the lower
cowl. Most of my vibration is now gone.
Scott Krueger
320
In a message dated 5/11/2009 7:31:50 P.M. Central Daylight Time,
mjrav@comcast.net writes:
Another low cost option is to swap the upper
mounts that have been stretched with the lower ones that have been
compressed. Good to go for another 50,000 miles.
Mark Ravinski
360 1463 hrs.
----- Original Message -----
Sent: Saturday, May 09, 2009 5:18
PM
Subject: [LML] spinner against
cowl
A guy walked up to my 360 this morning and noticed that the
bottom of the spinner is rubbing against the bottom cowl. "you
couldn't squeeze a leaf in there," he said. Clearance from the top
cowl is good, though.
Is it just a matter of reseating the bottom
cowl?
Keith...a newbie owner still learning the basics of aircraft
ownership.