Model Engine Maker
Help! => Hints, Tips & Tricks => Topic started by: Moxis on September 27, 2018, 08:41:58 AM
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Hi guys. Soon I reach the phase for final installation of my Marcher engine. So this is the time to ask about materials.
I think I have to make some sort of gaskets between cylinder block and covers & valve chests and cylinder block to make them tight. But which material to use? Should I use some sort of paper, plastic, or tightening jelly for this?
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Take a look at teflon sheet. I use it in all my engines. .020-.030 inch thick for head gaskets and .01 thick for all others. After years of running I took apart the peewee for inspection and the gaskets came right off without sticking to the surfaces. They wiped clean with a paper towel and were ready for re installation.
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Hello Steve
Can you tell us more about your PTFE/ Teflon head gaskets please. I understand teflon to be quite soft, so how much does the material compress?
Do you use them on your i/c engines or only for steam? I did a search for the PeeWee but it directed me back to this thread. Have you used them for multi cylinder i/c engines?
How do you make the head gaskets, I guess with scalpel and hole punch or is there a better way? With paper gaskets you could always tap around the edge of the casting to cut thin paper/card material, does that work with teflon?
Thanks for your advice. :happyreader: :happyreader:
Mike
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Compression, I don't know. Never measured but I would surprised if it were more than 5%
I have used the material in the peewee and pacifier v4's and also in the demon v8. All are spark ignition, gasoline engines.
I have in the past made templates so drill bits and razor blades can be used to make gaskets. I also had some sets laser cut for the v8.
I am on the road to the mid-ohio model show so I can't post pics right now but I can post some early next week.
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Hi Steve,
Thanks for getting back and answering the important questions. Hope you enjoy the mid-ohio show.
So the simpler gaskets could be hand made, but I like the idea of laser cut for the more complex multi cylinder engine.
Enjoy Mid-Ohio
Mike
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I agree with Steve. I have used Teflon sheet from McMaster Carr for years in air powered engines with very good results.
Gary
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Hi Steve,
If you want to go the paper route, visit your local machine shop. If they are nice to you, they may walk over to their gasket drawer, pull out a piece of professional gasket material and reach for a pair of scissors. No charge.
It worked for me. The material was Karropak Fell-pro.
Cheers...John