engine breather / catch tank

[Rocketman]

I am going to fit an oil catch tank to the inner wing of my 3A. I will need to make one of these fittings to push into the hole in the side of the block with a AN10 thread on it. Not a problem to turn one on the lathe with a thread on but does anyone know the diameter of the hole in the block where it pushes into?

I will run a second tube to a mounting on the side of the rocker cover using black braided nylon tubing with AN10 fittings.

This will hopefully provide better breathing to the engine especially the top as that has a tiny hole in the cap and hopefully prevent extra oil being put onto the road.

This set up should make a neat installation and nice little project for the weekend

[Hamish]

Hi I have just measured the original breather hole as mine had I was sure a 28mm copper plumbing pipe and elbow which worked very well fitted with a bit of mastic

hope this helps. Actual is 28.34mm. With precision Aldi caliper

Edited March 20 by Hamish

[BlueTR3A-5EKT]

4 hours ago, Rocketman said:

I am going to fit an oil catch tank to the inner wing of my 3A. I will need to make one of these fittings to push into the hole in the side of the block with a AN10 thread on it. Not a problem to turn one on the lathe with a thread on but does anyone know the diameter of the hole in the block where it pushes into?

I will run a second tube to a mounting on the side of the rocker cover using black braided nylon tubing with AN10 fittings.

This will hopefully provide better breathing to the engine especially the top as that has a tiny hole in the cap and hopefully prevent extra oil being put onto the road.

This set up should make a neat installation and nice little project for the weekend

Does your engine currently have the snorkel type breather pipe fitted in the side of the block?  If not be prepared for a bit of a game in removing the core plug that is in the hole that you want to place the breather in.

 

[Trumpy3]

I turned up an aluminum elbow with an O ring to fit inside the block. It has a small flange on the outer surface against the block. I then taped a small (3mm) thread next to the block breather hole and after fitting the new elbow screwed in a short screw with a washer that worked with the flange to prevent the elbow coming out. The elbow was then secure but could be turned to any direction required. This has been in place for about 12 years now.

I did this with the engine out so would be a bit hard with it installed. It may be a bit to understand exactly what I done from this description but I am down at the Melbourne F1 so cant take any pictures.

Brian

[Rocketman]

Thanks for the replies. My engine does have a snorkel on at the moment so I will have to remove it then turn a piece on the lathe to make it work. I will post pictures when done