Repairing a high quality model marine engine

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kvom:
I was going to ask you why the steam glands on the paddleducks engine had the two piece design connected by threads, but I guess this explains it. :smart:

bogstandard:
Kvom,

As I said in the post, PTFE tape just twisted up to make like a piece of string will be perfectly good enough for most engines. So there is no need to go searching out any specialist packing materials.

It is only because I like to use only the best in rebuilds that I go to such trouble. The joint I made will last for many trouble free years, and will only need repacking when the adjustment runs out.

The stuffing gland has to be packed. Not only does it prevent leakage, but also forms the bottom bearing surface for the cylinder or operating rod.

Bogs

Divided he ad:
Looking Good there John :thumbup:

I'll be one of the reasons that this post was slowed down :wave: spent much of Thursday at Johns chatting, visiting the scrap yard and then also chatting with Stew, went round to Stews shop too..... I don't fit in there!!! :jaw: :lol:

I do enjoy a gathering and a chat, thank you fellas.... it was a most enjoyable day :thumbup:

We did look at this little beastie, it had the new friction linkage done at that time. A little fettling later it all seems to be coming together John :headbang:

Keep us posted :)

Ralph.

sbwhart:

--- Quote from: Divided he ad on May 02, 2009, 07:22:47 AM ---
went round to Stews shop too..... I don't fit in there!!! :jaw: :lol:

I do enjoy a gathering and a chat, thank you fellas.... it was a most enjoyable day :thumbup:

Ralph.

--- End quote ---

It was a size thing I'm only 5' 9" Ralph must be 6' +, the shop head room is only just over 6' its what you call in the trade a head banger shop

:headbang: :headbang: :headbang: :headbang:.

It was enjoyable meeting up and chatting :thumbup:

Have fun

Stew

SPiN Racing:
Gorgeous engine work there John...

And thanks for taking the time to explain the packing. I always wondered in the back of my mind about that.. and as you started explaining it.. I was starting to go.. "OH YEAH!! That is how its done.. and why..... I wondered about that!"

BTW.. Hylomar..
I LOVE that stuff.
It is ALWAYS on hand in my garage. I have one tube in reserve, and one in use.

It is ESSENTIAL for a rotary engine rebuild.

The rotary is basically a sammich of Cast Iron and Aluminum. With big ole O rings. One for the combustion area.. and one for the water jacket.
HOWEVER... the metal everywhere else is in contact with the dissimilar metal.
A HUGE problem many people ru n into is the heating and cooling of dissimilar metals. Cast Iron and Aluminum.. VERY different heating rates. And the end result of this difference is galling of the surfaces that mate.
The galling leads to leaks. The little tiny amount of galling eventually builds up little balls of metal that worsen things until eventually you start to leak oil or water in an area where the galling has been happening.
The Hylomar works two fold.. it makes a very nice thin seal.. and it also lubricates the two surfaces.. so when they heat and expand at different rates.. the seal is not broken.. and the metal is able to expand without galling.

Love the stuff.

Scott

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