Addressing leaks in oil and fuel hose

TLDR

• Addressed oil leak in oil return port (right hand side)
• Discovered a fuel leak :-(

Details

Oil Leak

As I mentioned on my Oct 5 blog, I had an oil leak on the oil return port on the right hand side of the engine.

Today after I warmed up the engine, I took an 7/8 wrench to tighten it a tiny bit.

The clearance between the PTFE hose and the exhaust pipe was like 3 mm and I did not pay close attention. As I tightened the -8AN fitting the hose rotated and the heat shrink around the hose touched the exhaust pipe. I immediately untorqued the 8AN fitting to get the hose away.

Then I waited the exhaust to cool down, then inserted several layers of rubber to hold the hose above the exhaust, then tightened the fitting again.

After the second tightening, I removed the rubber pieces to ensure the hose still stayed away from the exhaust, and no more oil dripped down.

Fuel Leak

As my friend says, “there is always something.”

I discovered a red drip hanging underneath the fuel filter as I continued to inspect all lines and hoses. I wiped it clean and smelled it - smelled like fuel.

I turned on fuel pumps to get the fuel flowing and inspected closely near the fuel filter and its connections. Some fuel indeed seeped out, about 1 drop per second.

I concluded that I have another leak I didn’t catch previously on the fuel connection into the Naviflow fuel manifold. This was at the M14 banjo bolt sealing the fuel filter into the manifold.

I researched a bunch online, and it seems I likely need a crush washer replacement. So I order crush washers, and some dowty washers (metal washer with rubber gasket in the center) which supposed to work better.

Tomorrow I want to just tighten the banjo a bit and try again. If it doesn’t work, I will probably swap out the crush washers. The only thing is, the connection is deeply buried behind turbo radiator and I am dreading to remove anything on the turbo assembly.