Snowbelt Spyder
Well-known member
In the second picture, where you see the word OUT, is this the location? If so, then two things come to mind - there is an o-ring where the oil tube meets the engine block. If you think that could be it. It looks like that area right above the drip.
However, the most likely source of leakage in this area is from the o-ring in the oil filter cap. Are the screws tight enough? O-ring missing or damaged?
Otherwise, the second thought goes back a few years. The filter cap screws for the HCM oil filter and the engine oil filter, while they are the same thread and head size, are different lengths. The HCM screws are 5mm longer. If, during an oil change, one or both screws are swapped, those longer screws may bottom out in the engine filter cap holes and not adequately tighten down on the filter cap o-ring. So, they feel tight enough, but they aren't squeezing the o-ring tight enough. So then, oil seeps around the o-ring and migrates to wherever it wants to go. I've never actually tested that, but it was mentioned on here many moons ago. After that, I always practiced the policy of only removing one filter at a time. See what you think.
However, the most likely source of leakage in this area is from the o-ring in the oil filter cap. Are the screws tight enough? O-ring missing or damaged?
Otherwise, the second thought goes back a few years. The filter cap screws for the HCM oil filter and the engine oil filter, while they are the same thread and head size, are different lengths. The HCM screws are 5mm longer. If, during an oil change, one or both screws are swapped, those longer screws may bottom out in the engine filter cap holes and not adequately tighten down on the filter cap o-ring. So, they feel tight enough, but they aren't squeezing the o-ring tight enough. So then, oil seeps around the o-ring and migrates to wherever it wants to go. I've never actually tested that, but it was mentioned on here many moons ago. After that, I always practiced the policy of only removing one filter at a time. See what you think.