My friend has made another 6 of these breathers. They are an elegant and well engineered solution, are designed to be installed without the removal of the head, and are adjustable.
They work on
Twin Cam (Std and tall block)
BD series of engines.
I have them fitted on my elan T/C and also on a Escort fitted with a BDA
The design has evolved since this. I have it on a BDA. Also installed on my elan, but it’s a decked 711M block. The issue discussed will be a simple revision to the design that will include an interference O ring on the bottom hole, but also include the sealing O ring at top, of bottom hole. Please understand, this is an effort to provide a solution to the problem.
This is Rob’s design, and solution to the problem. I hope you all appreciate the effort and thought he has put into it. I included the safety wire on both my engines.
Thanks
James
This is my home made breather tube which I made and installed when I replaced my S4 water pump in 2018 (the pump had lasted about 20 years).
The machined aluminium tube has twin O-rings at the lower end that seal in the block and one large section ring sealing in the hole in the head which on my car looked to have a fairly rough (drilled) surface. The sliding collar locked with a grubscrew is mainly for axial location but has also has an O-ring that seals both diametrically and on the underside of the head,
Only a couple left.
It will be a few months before any more are available. Please PM if you’re interested and I’ll contact you when Rob has made more.
L block revision now includes an interference O ring and limit stop on bottom.