sealing cylinders

sealing cylinders

This topic has 6 replies, 5 voices, and was last updated 5 July 2016 at 21:43 by Bob Brown 1.

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5 July 2016 at 16:54 #245532
David Bothwell 1
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@davidbothwell1
I was wondering if somebody could advise on the best way of sealing cylinders (and valves) I bought some vey thin rubber from e-bay and thought this might be ok for fastening between the boiler and cylinder on a Minnie traction engine?. I am also aware of some other ways of effecting a seal, but could someone suggest a sealant compound
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5 July 2016 at 16:54 #32732
David Bothwell 1
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@davidbothwell1
sealing small cylinder and valves
5 July 2016 at 18:17 #245545
roy entwistle
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@royentwistle24699
I would have thought gasket material was the answer I don't think rubber would be suitable thin cork possibly

Roy
5 July 2016 at 18:33 #245547
JasonB
Moderator
@jasonb
A lot will depend on how good the jointing faces are, you could get away with a smear of Graphite Foliac or the more traditional method of thin 1/64" sheet jointing (gasket) with a smear of something like Stag or Hylomar on each side.

The rest of the cylinder covers, valve chest etc on a small engine like this can be done with a liquid gasket which you should be able to get from Halfords or e-bay. The advantage of this is that it adds no noticable thickness to teh joint so parts don't have to be made with an allowance for gasket thickness.

Blue Hylomar and sheet jointing here
5 July 2016 at 19:51 #245558
David Bothwell 1
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@davidbothwell1
Thanks very much for the useful and informative replies (and the link Jason)
5 July 2016 at 21:07 #245569
kevin beevers
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@kevinbeevers61752
would have thought shelac better than hylomar
5 July 2016 at 21:43 #245575
Bob Brown 1
Participant
@bobbrown1
LOCTITE SI 596 Red High Temp RTV Silicone Adhesive Sealant is good to 316 C or LOCTITE SI 5920 Copper High Temp RTV Silicone Gasket good to 371 C but there other high temp sealants.
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