Oil separator hoses, Guard liners, Brake caliper hoses

I originally machined a plastic Tee piece and a 90deg elbow to join the two ports in the cam cover to the Provent oil separator :

While I was heat cycle testing the engine I found condensation leaking from between the plastic adapter pieces and the cam cover breather ports, so they were not sealing properly. I had to redesign the oil separator hose connector layout and started with welding an elbow - lightly press fitted into the breather port between cylinder 1 & 2.

After trying various 3D printed prototypes with different hose layouts, I decided on this single piece design to connect everything. This resulted in a much lower profile layout that now seals properly. 

The oil drain hose from the Provent oil separator was fouling on the engine mount bracket. I bent some 25mm tube and welded a section of it to the engine mount bracket to stop any rubbing.

The valve at bottom of the drain hose had to be secured so I designed and 3D printed a simple saddle clamp to hold it against one of the subframe tubes.

To make the next task easier to work on, the engine and subframe were put on the workshop floor.

Significant sections of the inner guards were cut away to fit the custom subframe and I wanted to make some inner guard liners to prevent potential debris from entering the engine bay from the wheel wells. I mocked up a design in cardboard, then replicated it in fibreglass. 

This side had to modified slightly to provide clearance for the crankshaft pulley.

I needed to know where the liner needed trimming to clear the brake hose, however when I fitted the caliper hose (from a Goodridge MG Metro 4-pot caliper to Mini conversion kit) I found that it was fouling the water pump tensioner pulley when the steering was near full lock. The brake line hose mount needed to be relocated first.

After trialing a few locations, the mount was relocated so that the hose clears everything when steering is at full lock left & right, and suspension is at full droop and fully compressed. A section of the liner was then cut away to clear the brake hose.

For the passenger side, because the gearbox slightly extends into the wheel arch the liner had the center area cut out and a cover added to allow clearance for end of the gearbox. It's not circular, but a weird shape that surrounds the gearbox end with ~10mm clearance.

For the passenger side there was no way to have a brake caliper hose mount up higher without the hose fouling on the gearbox when the steering was at full lock. The only option I found was to have the brake hose mount underneath the gearbox. 

The liner only needed a minor trim to clear the brake hose.

A few tabs tapped with a M5 thread were then welded on the subframe to mount the fibreglass liners. These liners are not designed to be a super tight fit - there is minor gap between the pieces and subframe. This photo was taken of the drivers side from inside the engine bay :

The last area to cover was around the triangular brace sections on either side of the subframe. I made a small molded fibreglass cover piece on both sides, bolted to a simple mounting tab :