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Thread: Lycoming parallel valve guide pilots

  1. #21
    Clayton Harper's Avatar
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    Default Re: Lycoming parallel valve guide pilots

    Mark, Beware of an I.A. that knows everything, particularly if you never see him with a book. I learn a more correct way to do things all the time. I'm learning a whole lot about dry vacuum pumps on Cessnas now. Another tale for another day.
    The only true wisdom is in knowing you know nothing.
    Socrates

  2. #22
    rocket's Avatar
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    Default Re: Lycoming parallel valve guide pilots

    I know I've mentioned this before. I've rebuilt a whole bunch of air cooled VW engines and knowing what I know I've always had an engine shop build my aircraft engines. Even then I've had my share of issues with them :/. Thinking il try Lycon next time I need engine/cylinder work, if I can afford the downtime that is.

    Rocket

  3. #23
    mmoyle's Avatar
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    Default Re: Lycoming parallel valve guide pilots

    Question: does Divco anodize the case after overhaul?


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  4. #24
    Administrator Steve Pierce's Avatar
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    Default Re: Lycoming parallel valve guide pilots

    Yes, they do. Looks nice and I have rebuilt a few without paint.
    100_2435.jpg

  5. #25
    mmoyle's Avatar
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    Default Re: Lycoming parallel valve guide pilots

    Thanks...is what I thought. There is zero indication the case was anodized 200 hours ago. Im beginning to wonder if ..... about a lot of things....


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  6. #26
    mmoyle's Avatar
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    Default Re: Lycoming parallel valve guide pilots

    Going back together...condemned the crank due to deep scoring on the front main journal. Replaced with yellow tagged three under rods, six under mains. Cylinders are well within spec. Number three exhaust seat was a real challenge to grind...valve depth is probably 0.020 deeper than all the other seats....the cylinder shop that reportedly ported and ground the seats opened up the seat with a sixty degree stone which put the valve seat contact area right at the edge of the valve. Will be installing the single lead CHT instrument on that cylinder. Replaced the rings, pistons and pins. The take out pins were badly pitted where exposed. And it was missing the 3/8 case bolt above and behind the cam shaft gear.. checked the gap in the rings..right at eight thousandths at the choke where the piston is at TDC. Installed three cylinders this evening. Should have the engine assembled tomorrow.


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  7. #27
    mmoyle's Avatar
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    Default Re: Lycoming parallel valve guide pilots

    Almost ready to install on the airframe. Was able to obtain the correct valve lash using shorter push tubes. Number three exhaust rocker arm needed a dash 10 push tube, lash was .051 Exhaust rockers on cylinders 1 and 2 needed dash 11s. Installed new fuel primer lines and added a primer fitting to number one cylinder. Few zip ties and the exhaust. Make new P leads and will be ready to install.


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  8. #28
    mmoyle's Avatar
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    Default Lycoming parallel valve guide pilots

    Removed from the building today...new P leads installed and replaced the grommets on the firewall....other details that were overlooked. Ground straps..not on bare metal. Will lace all the loose wires. The old engine heat system needed to be re...worked and rerouted...one bad cylinder head heater. Carb heat muff planished, flanges mostly fixed. Should have it buttoned up and test run tomorrow.


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    Last edited by mmoyle; 07-15-2018 at 02:14 PM.

  9. #29
    mmoyle's Avatar
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    Default Re: Lycoming parallel valve guide pilots

    Ready for first start..well almost...still waiting on another oil cooler..dont ask...poo!
    One question: how do you tell which end is number one on a brand new McCauley propellor..Borer 82/44. I dont see any number or stamp. There is a couple holes bored through the prop outside the propellor bolt circle...one has yellow paint inside the hole.


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