520 Continental rebuild

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diamondback0320
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Re: 520 Continental rebuild

Postby diamondback0320 » Tue Oct 09, 2018 9:40 am

the 520 has hydraulic lifters like in the diagram?I thought only the 76 series lycomings had those types of lifters

flcracker9
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Re: 520 Continental rebuild

Postby flcracker9 » Tue Oct 09, 2018 9:53 am

John Fenner wrote:You have to take them apart and clear all oil from them, if too tight, you knock the tips out of the tubes and trim the tubing to suit.


That's the route I tried to take on the pushrods, but for the life of me, I couldn't get the ball end out of the pushrod. My pushrods look like the ball ends were plug welded. I was advised to lay the pushrod on a hard surface like my vice, and take a hammer and tap on the side of the pushrod where the plug weld is
to break the weld loose, but that didn't work either. Ended up going to adjustables. Disassembling the lifters is a must to get proper lash.
12' Open Palm Beach, IO-0470-L 260hp, 72" NGQ

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Slidin Gator
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Re: 520 Continental rebuild

Postby Slidin Gator » Tue Oct 09, 2018 10:10 am

Something I have run into, unless the oil is drained out of the sump, don't install all the lifters at once. Just put in 1 pair at a time, set valve lash on that cylinder, then move to the next. If the oil system is full, every time you turn the prop it pumps oil and fills the lifters. After a few revolutions you might have to pull lifters back out to disassemble and drain again to get lash set right. Luckily, Lycoming lifters are a lot simpler to clear and test.

In the case of this new build, just don't fill it with oil until it is all together and this won't be an issue.

I'm with cracker, followed the same procedure to shorten the rods, it's a pain, takes a lot of time and you can't make them longer. Prefer adjustable.
I grew up thinking I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540, 72” NGQ. A Bob Stossel original.

rowdy1
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Re: 520 Continental rebuild

Postby rowdy1 » Tue Oct 09, 2018 9:15 pm

I dropped off the crank this morning, waiting to hear how it mic's out.

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Re: 520 Continental rebuild

Postby rowdy1 » Wed Oct 10, 2018 7:11 pm

Crank is ready, light polish job everything above minimums. Ready to order bearings.

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Slidin Gator
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Re: 520 Continental rebuild

Postby Slidin Gator » Wed Oct 10, 2018 7:16 pm

Cool! Sounds like you are on your way,
I grew up thinking I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540, 72” NGQ. A Bob Stossel original.

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Re: 520 Continental rebuild

Postby rowdy1 » Sun Oct 14, 2018 8:06 pm

I am I need of a bearing set, #SA427795A3 , standard dia. This is for a phase 1 470 block. I cant find one, every where I look on line is 4 - 6 weeks out, if they even know where to find one. I cant even find the thrust bearing in this set, which is what make the set "odd". Who has one hoarded up on the top shelf in there shop?

lorick
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Re: 520 Continental rebuild

Postby lorick » Sun Oct 14, 2018 8:34 pm

Lacey Everett Superior airboat motor company he is the man to call for a continental engine he's in Orange Springs

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kwanjangnihm
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Re: 520 Continental rebuild

Postby kwanjangnihm » Mon Oct 15, 2018 5:05 am

Lacey Everett
352-546-4224
Orange Springs (northern Marion County)
" I don't care who you are back in the world, you give away our position one more time, I'll bleed ya, real quiet. Leave ya here. Got that? "

rowdy1
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Re: 520 Continental rebuild

Postby rowdy1 » Mon Oct 15, 2018 10:10 am

That's who built the motor to start with! I want a new set of bearings.

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John Fenner
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Re: 520 Continental rebuild

Postby John Fenner » Mon Oct 15, 2018 10:31 am

Cecil field in Melbourne 3214037429 or Steve Lurie at warrior 7722604235
I never finish anyth,,,.

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Re: 520 Continental rebuild

Postby rowdy1 » Tue Oct 16, 2018 12:17 pm

Aircraft Specialties found them. No one could get the complete set, but after they found the thrust bearings separate the rest was easy. Bearings and gaskets are all on the way. Also, I'm sending my rods and rockers to D & S Cams for a referb. as well as the cam and lifters for a 292H grind. 10 - 1 Ross pistons are on order too. Its a good thing my kids are grown up, Christmas is gonna be light this year!

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John Fenner
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Re: 520 Continental rebuild

Postby John Fenner » Wed Oct 17, 2018 2:09 pm

D/S are great folks!
I never finish anyth,,,.

StanleyAirboats
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Re: 520 Continental rebuild

Postby StanleyAirboats » Wed Oct 17, 2018 2:22 pm

make sure you have your case checked for cracks in the lifter holes while it is a part .

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Re: 520 Continental rebuild

Postby rowdy1 » Wed Oct 17, 2018 2:44 pm

How do I do that Magnaflux, or visual inspection? Is it something that will be obvious?

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Slidin Gator
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Re: 520 Continental rebuild

Postby Slidin Gator » Wed Oct 17, 2018 10:45 pm

Case is Aluminum. You need dye penetrant to inspect for cracks, magnaflux only works on iron or steel.

Don’t depend on visuals for 100% confirmation, but worth looking with magnifying glass and flashlight first before bothering with dye pen. Just guessing $50 or less at a machine shop, assuming they work with aluminum blocks or cases. Otherwise, you can order/buy a kit from a weld supply house. It is a 2 part process. Spray dye first, then white developer. Cracks show as red dye bleed through the developer. Know any aluminum welders? They might have dye pen kits.
I grew up thinking I-10 was the Mason Dixon line.
1986 Airboat Engineering Inc., 14' Marsh Master. Refreshed narrow deck, SV O-540, 72” NGQ. A Bob Stossel original.

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Re: 520 Continental rebuild

Postby fletchster76 » Thu Oct 18, 2018 3:06 pm

How much extra power will those Ross 10-1’s make over the 8.6-1’s. Would it be the same as the Difference between the 7’s and the 8.6’s which is 15hp correct?
14’ Viking, 520 conversion, 72" 3 blade ngh

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John Fenner
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Re: 520 Continental rebuild

Postby John Fenner » Thu Oct 18, 2018 4:07 pm

Night and day
I never finish anyth,,,.

rowdy1
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Re: 520 Continental rebuild

Postby rowdy1 » Thu Oct 18, 2018 8:20 pm

According to 1 builder, the considerable weight difference alone between the cast stock pistons and forged Ross pistons, should give it a lot more snap. The add a point and a half in compression and hopefully it will be magic. Bearings and gasket kit came in today, I'm gonna spend all weekend cleaning and organizing parts.

rowdy1
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Re: 520 Continental rebuild

Postby rowdy1 » Thu Oct 18, 2018 8:20 pm

According to 1 builder, just the considerable weight difference between the cast stock pistons and forged Ross pistons, should give it a lot more snap. Then add a point and a half of compression and hopefully it will be magic. Bearings and gasket kit came in today, I'm gonna spend all weekend cleaning and organizing parts.

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Re: 520 Continental rebuild

Postby rowdy1 » Mon Oct 22, 2018 3:26 pm

I found 2 bent pushrods this weekend! One was bent so bad it was rubbing the tube. That might have been the problem all along. I also noticed that the intake tubes did not line up between #3 - #5 when I took it apart. I mocked it up the weekend and no mater which intake I use #5 is off a little, like 3/8 of an inch. It almost looks like the head is twisted slightly on #5 jug. All my parts got dropped of at D & S this morning, as well as the cylinders to Moore Performance in Edgewood. I have all parts in hand except for pistons.

AirHog
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Re: 520 Continental rebuild

Postby AirHog » Mon Oct 22, 2018 4:22 pm

Look and see if you have oil leaking around the head .... sounds like a separated head.

See if you can make it move on the cylinder.....

Better yet do a leak down test

Good luck

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rowdy1
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Re: 520 Continental rebuild

Postby rowdy1 » Mon Oct 22, 2018 4:32 pm

It is an old worn out nikosil cylinder. Im going to use it to hold the door on the back porch open. Or maybe yard art!

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Re: 520 Continental rebuild

Postby rowdy1 » Thu Oct 25, 2018 9:52 am

Is anyone using permatex or any other sealant to reseal a/c cases/ Mine had silk thread when I took it apart. I know several people who use permatex, and one that used a product called anaerobic sealant. Catapiller uses this on all of their high pressure pumps and machined surfaces.

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John Fenner
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Re: 520 Continental rebuild

Postby John Fenner » Thu Oct 25, 2018 11:46 am

I use anaerobic flange sealant, not even a weep of oil.
I never finish anyth,,,.


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