Major Seal 30cc Build

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Weldsol

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Hi Basil if you are using a head gasket it will very slightly under that reading
You could overcome that by lapping the block and head
Also you could skim the head but if you do check valve to head clearance

Paul
 

Basil

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I plan to use gasket eliminator for the joint. I’ve used this Locktite product before with good success although not on anything this small. The water feed to the head will be external. 👍I’ll do a plastiscene check on valve to head interference Paul. Thanks
 

gadabout

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I plan to use gasket eliminator for the joint. I’ve used this Locktite product before with good success although not on anything this small. The water feed to the head will be external. 👍I’ll do a plastiscene check on valve to head interference Paul. Thanks
That’s all the compression my Seal 15cc has, I also used loctite gasket eliminator, works well!
cheers
Mark
 

Charles Lamont

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I would suggest Stag Wellseal. It does not harden. I have used it on my Seagull, where there is less than 1/8" between combustion chamber and water passage. The mating faces are lapped flat.
 
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Basil

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Thank you Charles, I have started using Wellseal on some large engines I work on and really like it. 👍
Work progressing on the Seal Major engine. I decided to improve upon the manifold to block fixing by relocating some of these bolts so as they do not run into the head studs. I had already drilled the manifold and cover plate so had to plug these and counter bore the cover and make raised spacers to retain the "as cast" cover appearance.
Next was the lifter cover where the retaining bolts screw into the block water jacket. I decided to make threaded stand offs that were high temp. epoxied in place and machined flush with the mounting surface to stop any deforming when tightened the delicate cover.
As I mention previously this engine will be installed in a boat and at the same angle as the prop shaft ( about 9-10 deg) The timing cover being at the lower end. I purchased a seal 10mm ID x 14mm OD. 3 mm thick and made a hardened and ground spacer for the seal to run on.
Also incorporating a bronze bushing to hopefully help support the crankshaft.
Deciding against drilling the block deck for water passages to feed the head, I constructed an outside water link manifold.
Dipstick was next on the list and I really enjoyed making this little jem.
This evenings job was a couple of water flanges for the block and head.
 

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Basil

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Another part finished. The Seal Major oil Trough. Unfortunately I was so involved with it I forgot to photo all the pieces. Too much solder but it will work fine. 👍
 

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