Today's Message Index:
----------------------
1. 03:50 AM - Rocker arm bushing update (Lynn Matteson)
2. 08:22 AM - Re: Rocker arm bushing update (Noel Loveys)
3. 03:02 PM - Re: Rocker arm bushing update (Peter Harris)
Message 1
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| Subject: | Rocker arm bushing update |
For anyone interested, I just re-checked my valve lash (prior to
heading to Kitty Hawk this weekend), and they were all .008"---.010".
A bit of history: I changed the rocker arm bushings after the
originals "went South" at 273 hours. I installed brass bushings with
no teflon coating. I checked and re-set the lash/clearance 15 hours
after the bushing replacement, and now have 420 hours total on the
engine. Prior to changing the bushings, the valve lash would always
increase...up to .016" on some of the valves, due to the bushing
material being worn away. I felt comfortable enough with my
modification that I flew from Michigan to California and back, to New
York and back, Oshkosh, etc.
Lynn Matteson
Grass Lake, Michigan
Kitfox IV Speedster w/Jabiru 2200
flying w/400+ hrs
do not archive
Message 2
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| Subject: | Rocker arm bushing update |
I think there was a similar problem with the cam gear drive on the old GM
302. Teflon wear caused the cams to "go bad"
Noel
> -----Original Message-----
> From: owner-jabiruengine-list-server@matronics.com
> [mailto:owner-jabiruengine-list-server@matronics.com] On
> Behalf Of Lynn Matteson
> Sent: Wednesday, October 10, 2007 8:24 AM
> To: jabiruengine-list@matronics.com
> Subject: JabiruEngine-List: Rocker arm bushing update
>
>
> <lynnmatt@jps.net>
>
> For anyone interested, I just re-checked my valve lash (prior to
> heading to Kitty Hawk this weekend), and they were all .008"---.010".
>
> A bit of history: I changed the rocker arm bushings after the
> originals "went South" at 273 hours. I installed brass bushings with
> no teflon coating. I checked and re-set the lash/clearance 15 hours
> after the bushing replacement, and now have 420 hours total on the
> engine. Prior to changing the bushings, the valve lash would always
> increase...up to .016" on some of the valves, due to the bushing
> material being worn away. I felt comfortable enough with my
> modification that I flew from Michigan to California and
> back, to New
> York and back, Oshkosh, etc.
>
> Lynn Matteson
> Grass Lake, Michigan
> Kitfox IV Speedster w/Jabiru 2200
> flying w/400+ hrs
> do not archive
>
>
>
>
>
>
>
Message 3
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| Subject: | Rocker arm bushing update |
Great work Lynn. Have you posted details of the brass bushes? Is this the
J3300 or 2200?
Peter H
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com
[mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Lynn
Matteson
Sent: Wednesday, 10 October 2007 8:54 PM
Subject: JabiruEngine-List: Rocker arm bushing update
For anyone interested, I just re-checked my valve lash (prior to
heading to Kitty Hawk this weekend), and they were all .008"---.010".
A bit of history: I changed the rocker arm bushings after the
originals "went South" at 273 hours. I installed brass bushings with
no teflon coating. I checked and re-set the lash/clearance 15 hours
after the bushing replacement, and now have 420 hours total on the
engine. Prior to changing the bushings, the valve lash would always
increase...up to .016" on some of the valves, due to the bushing
material being worn away. I felt comfortable enough with my
modification that I flew from Michigan to California and back, to New
York and back, Oshkosh, etc.
Lynn Matteson
Grass Lake, Michigan
Kitfox IV Speedster w/Jabiru 2200
flying w/400+ hrs
do not archive
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