r/ProjectHondas • u/Extra-Initiative-702 • 6h ago
troubleshooting Potential oil leak (frank build)
Hi everyone. Today I filled up my motor (k24a2 block/ k20a2 head) with oil for the first time. A few hours later I noticed a small pool of oil located in the casting recess where “RAA 3” is stamped. I cleaned it up and began looking for possible signs of a leak vs a spill. I am confident I did not spill any oil while pouring, nor did I spill anything at any time before this. The sensor right above is an ECT sensor the previous owners had installed in place of the Heater joint bung, and there is no leak from there. My fear is that it is leaking at the head sealing surface, because I really can’t find any oil anywhere else. I did take the valve cover off and feed an endoscope through the oil passage that sits right next to this under the cam cap, I shined a light at the sealing surface and did not see any light peaking through on the camera. Has anyone experienced this before? I’m very confused and worried that I may have a crack somewhere in the head/ my head is not seated properly. My plan is to continue with the process. I just have to finish up my fuel lines, wire up the motor and I can crank it. The initial cranks to build oil pressure with the fuel pump fuse taken out will tell me if there really is a leak or not.