Author Topic: Seal 15CC, yes another!  (Read 577 times)

Offline gadabout

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Seal 15CC, yes another!
« on: September 20, 2019, 08:01:16 AM »
Hi all!
I have just about completed my Seal 15cc ,just waiting on the ignition system and spark plugs. In the plans there is no mention of a head gasket (amongst other things)just lapped surfaces, what do people think? I'm tending towards something from a sealer to paper gasket to Teflon?

Thanks
Mark

Online Jo

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Re: Seal 15CC, yes another!
« Reply #1 on: September 20, 2019, 08:07:33 AM »
The cylinder head is soft Aluminium so you don't need one.

Jo
Usus est optimum magister

Offline gadabout

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Re: Seal 15CC, yes another!
« Reply #2 on: September 20, 2019, 08:21:43 AM »
Jo,
Thanks, I was thinking at a mininium something like a varnish or gasket sealant but I will go with nothing and see how I go. The block and head have been finished with 800 wet and dry paper on a surface plate so should be reasonably flat
Cheers
Mark

Offline ChuckKey

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Re: Seal 15CC, yes another!
« Reply #3 on: September 20, 2019, 02:40:33 PM »
ET Westbury mentions using varnish, and ISTR seeing him mention copal varnish, an artists' varnish I would not be surprised if one can't get any more. Hermetite sadly has gone. Hylomar may be a more modern equivalent, but I find it rapidly becomes too stiff to apply thinly to small areas.

Online Jo

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Re: Seal 15CC, yes another!
« Reply #4 on: September 20, 2019, 03:27:48 PM »
If you want a sealant that will go very thin and not dry out on you use Stag's Wellseal jointing compound  ;)

Jo
Usus est optimum magister

Offline ChuckKey

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Re: Seal 15CC, yes another!
« Reply #5 on: September 20, 2019, 11:39:47 PM »
Thanks Jo. Seems a lot of people say the same, so I now have a tube of Wellseal on order. Others seem to swear by Heldite, so I have a tester of that comming too, just to see what it is like.

Offline gadabout

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Re: Seal 15CC, yes another!
« Reply #6 on: October 04, 2019, 08:37:04 AM »
It's alive! I received my s&s cdi fro Roy Sholl this week for my Seal 15cc and hooked it all up and it fired up and ran after advancing the distributor a bit! It's built to the plans with the horizontal distributor and the carb from the plans. Rather low on compression but, it runs and starts fairly easily . Doesn't want to idle down to a low  tick over but does seem to be getting better the more I run it. Had an hour or so of running.
Will get more tomorrow after an oil change  :whoohoo: :whoohoo: :pinkelephant: :cartwheel:
Cheers
Mark

Online Jo

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Re: Seal 15CC, yes another!
« Reply #7 on: October 04, 2019, 09:37:23 AM »
Well done  :)

 :pics:

Jo
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Offline gadabout

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Re: Seal 15CC, yes another!
« Reply #8 on: October 04, 2019, 10:54:44 AM »
Jo,
See what I can do about some pics, don't know how to post them though  :facepalm2:
Mark

Online Jo

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Re: Seal 15CC, yes another!
« Reply #9 on: October 04, 2019, 02:15:04 PM »
You can easily attach them to your post Mark. If you look just under the box you put your text for posting on the forum you will see it says "Attachments and other options"  ;)

Jo
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Offline gadabout

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Re: Seal 15CC, yes another!
« Reply #10 on: October 04, 2019, 10:27:04 PM »
Jo , ok I will give it a try ,will take either with iPhone or iPad,not sure what size pics they take ,I hope they are not too big.
Mark