2000 Accord EX 4cyl-340K- have a pesky oil leak that appeared last year(Dec) at about 310K miles. With the car on the lift I noticed it coming from above the transmission (pass side). I'm sure it's oil as the transmission fluid level is unchanged and only engine oil is decreasing. I've had it to the dealer twice already and he says they replaced the valve cover gasket, the Distributor seal, and the distributor internal seal. Still leaking. The oil pan gasket is fine. What other seals are in that area? I suspect the mechanic added some seal sweller to my oil last time as the leak returned after I changed oil. I am using synthetic 5W30 since the car was new. Any thoughts?

 

Check the vtec solenoid for leaks.

 

Not as common as the VTEC valve, but there's another place. The valvecover gasket goes over the top of the last camshaft-bearing-cap. Is it possibly leaking through the seam between the bearing cap & the head?

If you were to take the distributor out, look at the hole it came out of. The head itself forms the bottom half of that hole. The bearing-cap forms the top half. Should be Honda-Bond there from when they install the bearing cap.