I've been watching Bruce Turrentine's 13B rebuild tape and

I've got a few

questions about re-using various seals. My engine is a

13BREW, which I am

going to put 88-91 NA rotors in. Do I need to go with all

new apex , side and

corner seals, or can I re-use some of the old seals. And,

for the thousandth

time, what is a good source of the various o-rings used in

the re-build.

Specifically, the side oil o-rings from Hayes are more

expensive than others

that some people here have mentioned, so what is the source

and the part

numbers of these things?
Thanks for suffering through these questions yet again.

Brian Trubee

Everyone has their own standards on this kind of stuff so it is really hard
to answer "when can I re-use a part?"  Unless it is a recently overhauled
engine being opened up for some other reason, I'd always replace the apex
seals.  The two piece Hurley seal (2mm)  is my current choice.  I've never
seen a worn out side seal so if in one piece, I'd reuse them if they meet
the wear specs.  I've never seen more than .002 wear. Replace the 'wavy
wire' springs under them.  Re-use corner seals (if in-spec) but use new 3rd
gen springs on them.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

 
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