Cylinder gasket
11-09-2022, 12:27 AM
#1
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Join Date: Jan 2010
Location: gauteng, SOUTH AFRICA
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Cylinder gasket
Greeting to everyone.
I recently was lucky enough to get a whole bunch of small diesel engines from a modeler giving up the hobby.
My question is about the cylinder gasket. OEM parts are no longer available, so I was thinking about making my own, by punching them from gasket material.
What is the correct material to use? Would vulcanized gasket sheet work?
I guess the thickness would effect the performance. what is the correct thickness for the following.
Allbon dart
DC Dart
DC Spitfire
DC Merlin
DC Sabre.
Any input appriciated.
I recently was lucky enough to get a whole bunch of small diesel engines from a modeler giving up the hobby.
My question is about the cylinder gasket. OEM parts are no longer available, so I was thinking about making my own, by punching them from gasket material.
What is the correct material to use? Would vulcanized gasket sheet work?
I guess the thickness would effect the performance. what is the correct thickness for the following.
Allbon dart
DC Dart
DC Spitfire
DC Merlin
DC Sabre.
Any input appriciated.
Last edited by trevornicolau; 11-09-2022 at 12:28 AM. Reason: some more detail
11-09-2022, 01:25 AM
#2
Member
Gasket
Your one lucky dude, don't suppose he had an unstarted, even part made precedent hi boy kit ?
Anyways, DC engines.
Check . Sceptreflight...
The DC Merlin, spitfire and sabre do not have a head gasket. They do have a back plate gasket, and from memory a " cylinder base " gasket, but check on sceptreflight
The spit and sabre probably have the same backplate gasket. A brown envelope gasket would surfice I think. Same for cyl base gasket if they have one.
if these engines were mine, I you find a suitable jar, wide neck shallow salsa type and submerge the engines in UK petrol, to remove most of the castor gum. Leave for a day and check "gum" floating/settled on jar bottom.
No need to remove crank as there is no " oil way " to lub the crank main bearing, which is the crank case. The prop driver is a taper fit on the crank.
Do not force the engine over tdc else you may break the con rod. New needle valves are available, PAW ones being a larger diameter. These run well on model technics ( different company these days ) D1000.
They are wonderfully little engines.
Ps, it's best not to "clean" piston crown and skirt, and cylinder, as this will remove some compression retaining gum.
Pictures and feedback would be good....
Anyways, DC engines.
Check . Sceptreflight...
The DC Merlin, spitfire and sabre do not have a head gasket. They do have a back plate gasket, and from memory a " cylinder base " gasket, but check on sceptreflight
The spit and sabre probably have the same backplate gasket. A brown envelope gasket would surfice I think. Same for cyl base gasket if they have one.
if these engines were mine, I you find a suitable jar, wide neck shallow salsa type and submerge the engines in UK petrol, to remove most of the castor gum. Leave for a day and check "gum" floating/settled on jar bottom.
No need to remove crank as there is no " oil way " to lub the crank main bearing, which is the crank case. The prop driver is a taper fit on the crank.
Do not force the engine over tdc else you may break the con rod. New needle valves are available, PAW ones being a larger diameter. These run well on model technics ( different company these days ) D1000.
They are wonderfully little engines.
Ps, it's best not to "clean" piston crown and skirt, and cylinder, as this will remove some compression retaining gum.
Pictures and feedback would be good....
