Gasket alternative grooving tool

[tonyfoale]

I do however love the idea of a tool to create grooves for sealant to lock into. O-rings even more, but I would have to do it on a manual Bridgeport, so it wouldn't' look nearly as nice as the ones Tony did.

The first push rod tunnel, that I did, was chased around manually on a Bridgeport. The one shown in the last 3 photos above was done with the CNC. Here is a pic of the manually done one.

Click for full size.
Chasing around manually.


On the left is the manually traced version with the CNC version on the right.

Both worked equally well. Never let lack of CNC be an excuse, the world was built on manual Bridgeports.


This what I do at the other end of the pushrod tunnel. In stock form the distance between the two surfaces is slightly variable and the factory used a soft rubber style gasket 2/3 mm thick. This would tend to slide about with use and most old engines have punch marks on the surfaces to try and hold the gasket. As the head to cylinder distance can vary I prefer a system which is designed to allow axial movement. I bore out both head and cylinder to take an O ringed joining tube. Goodbye to leaks.