Cylinder head gasket

Home Model Engine Machinist Forum

Help Support Home Model Engine Machinist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Iampappabear

Well-Known Member
Joined
Mar 10, 2018
Messages
70
Reaction score
17
With nearing completion of a Farm Boy Hit & Miss engine I will soon need a cylinder head gasket, what material and method of construction do you find work best for this gasket?

Thanks in advance,

Colin
 
I use teflon sheet. It comes in thickness of .002 up to a half inch. I use .020 inch for head gaskets and .010 for everything else. It cuts easily with a scissors or razor knife. After many years of use I removed a head. The gasket came right off, wiped off easily with a paper towel and was reinstalled. .020 looks to be 10 bucks a square foot. 1 sq foot makes 4 complete sets for my demon v8.

https://www.eplastics.com/sheets/ptfe
 
The Farm Boy uses an o-ring as a cylinder head seal, works just fine. It's 1 3/16" od and fits in the groove that's made between the 1.200" od of the cylinder and the 1.340" id of the cylinder end of the wate rhopper. It just sets in the groove. A 1/16" cross section works but if your sizes are off a bit a 3/32 cross section should work fine.

Jim G
 
Last edited:
Hi Colin
I replied to your same question on my YouTube channel. I used a bs025 o-ring which worked fine. If you are in the UK and would like me to post one to you, just email me your address.
Cheers
Andrew
 
Back
Top