---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Mon 02/20/06: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:32 AM - Lifters and stuck valves (TeamGrumman@aol.com) 2. 10:57 AM - Re: Lifters and stuck valves (James Courtney) 3. 07:02 PM - Re: Lifters and stuck valves (Gil Alexander) 4. 07:17 PM - Re: Lifters and stuck valves (Geoffrey Hickey) 5. 07:17 PM - Re: Lifters and stuck valves (Geoffrey Hickey) 6. 08:17 PM - Re: Lifters and stuck valves (TeamGrumman@AOL.COM) 7. 08:35 PM - Re: Lifters and stuck valves (TeamGrumman@AOL.COM) ________________________________ Message 1 _____________________________________ Time: 10:32:12 AM PST US From: TeamGrumman@aol.com Subject: TeamGrumman-List: Lifters and stuck valves --> TeamGrumman-List message posted by: TeamGrumman@aol.com I'm surprised no one wrote in to comment on what I found. ________________________________ Message 2 _____________________________________ Time: 10:57:00 AM PST US From: "James Courtney" Subject: RE: TeamGrumman-List: Lifters and stuck valves --> TeamGrumman-List message posted by: "James Courtney" It was my plane so I already had the chat with you. I also helped you clean the lifters for #3 which were binding so you've got no arguments from me:) Jamey AA5B N72T @ KSQL (okay, AUN for cylinders) A36 N7218R @ KSQL -----Original Message----- From: owner-teamgrumman-list-server@matronics.com [mailto:owner-teamgrumman-list-server@matronics.com] On Behalf Of TeamGrumman@aol.com Sent: Monday, February 20, 2006 10:30 AM Subject: TeamGrumman-List: Lifters and stuck valves --> TeamGrumman-List message posted by: TeamGrumman@aol.com I'm surprised no one wrote in to comment on what I found. ________________________________ Message 3 _____________________________________ Time: 07:02:52 PM PST US From: Gil Alexander Subject: RE: TeamGrumman-List: Lifters and stuck valves --> TeamGrumman-List message posted by: Gil Alexander Gary... doesn't SB388C also call out a cleaning of the lifters at the same time as the infamous "wobble check"?? If so, should be done every 400 hrs (old cylinders...) ....gil in Tucson >-----Original Message----- >From: owner-teamgrumman-list-server@matronics.com >[mailto:owner-teamgrumman-list-server@matronics.com] On Behalf Of >TeamGrumman@aol.com >Sent: Monday, February 20, 2006 10:30 AM >To: teamgrumman-list@matronics.com >Subject: TeamGrumman-List: Lifters and stuck valves > > >--> TeamGrumman-List message posted by: TeamGrumman@aol.com > >I'm surprised no one wrote in to comment on what I found. > ________________________________ Message 4 _____________________________________ Time: 07:17:48 PM PST US From: Geoffrey Hickey Subject: Re: TeamGrumman-List: Lifters and stuck valves --> TeamGrumman-List message posted by: Geoffrey Hickey TeamGrumman@aol.com wrote: > --> TeamGrumman-List message posted by: TeamGrumman@aol.com > > I'm surprised no one wrote in to comment on what I found. > > OK, I'll comment, If the tappets are varnished and carbon-coated, doesn't that also imply a temperature problem? Or are they generally like this when disassembled? (Maybe I should leave out the "or", given the temperature problems so common to our Lycomings.) When the old cylinders on the Cheetah failed the wobble check at 400 hours SOH, the #4 cylinder also had out-of-tolerance DTC on the exhaust valve due to a tuliped and eroded valve head. More over-temperature damage, I suspect. - Geoff Hickey - Cheetah N26681 ________________________________ Message 5 _____________________________________ Time: 07:17:48 PM PST US From: Geoffrey Hickey Subject: Re: TeamGrumman-List: Lifters and stuck valves --> TeamGrumman-List message posted by: Geoffrey Hickey TeamGrumman@aol.com wrote: > --> TeamGrumman-List message posted by: TeamGrumman@aol.com > > I'm surprised no one wrote in to comment on what I found. > > OK, I'll comment, If the tappets are varnished and carbon-coated, doesn't that also imply a temperature problem? Or are they generally like this when disassembled? (Maybe I should leave out the "or", given the temperature problems so common to our Lycomings.) When the old cylinders on the Cheetah failed the wobble check at 400 hours SOH, the #4 cylinder also had out-of-tolerance DTC on the exhaust valve due to a tuliped and eroded valve head. More over-temperature damage, I suspect. - Geoff Hickey - Cheetah N26681 ________________________________ Message 6 _____________________________________ Time: 08:17:05 PM PST US From: TeamGrumman@AOL.COM Subject: Re: TeamGrumman-List: Lifters and stuck valves --> TeamGrumman-List message posted by: TeamGrumman@aol.com It's possible that is was heat. But, not very likely. My guess is it wasn't flown enough. It did sit for a number of years. However, it has been flown regularly for the last 4 years. I'm wondering, Geoff, how many hours since Top? If your valves had been heated to the point of melting, (going into the plastic range), there is a very good chance the valve clearance was zero (or less). The valve piece I found in the muffler had been heated to the point that most of the valve seat mating surface had heat stress cracks in them. I'm still going to be checking my valve tappet clearance every 100 hours or so. Just in case. Gary PS, I can do that with my own plane. ________________________________ Message 7 _____________________________________ Time: 08:35:41 PM PST US From: TeamGrumman@AOL.COM Subject: Re: TeamGrumman-List: Lifters and stuck valves --> TeamGrumman-List message posted by: TeamGrumman@aol.com In a message dated 2/20/06 7:04:33 PM, gilalex@earthlink.net writes: > Gary... doesn't=A0=A0 SB388C also call out a cleaning of the lifters at the > same time as the infamous "wobble check"?? > > If so, should be done every 400 hrs (old cylinders...)=A0 ....gil=20in > Tucson > Well, yes, I guess it does. Hadn't thought of it.