I found a larger oil filter that may fit the R without a problem (same thread size... 20x1.5mm). Does anyone know if the oil cooler surface area (where the filter gasket meets the oil cooler) will allow a larger diameter gasket? Is there enough surface area for a larger gasket to not allow a leak? Factory/standard size filter gasket is about 2.48" in outside diameter. The larger filter I found has a gasket outside diameter of 2.83". Thanks.

 

don't think it will work.

 

Thanks to D and his filter mount measurements, the larger gasketed oil filter should seal fine.

D8400RPM: filter housing OD is 3.150"
D8400RPM: .3325" between the OD of the OEM gasket (which is this formula...(3.15 - 2.48) / 2 ) and the outer diameter of the flange on the block.

So, that being said, this filter should seal no problem.

 

flange on the block
but what about the oil cooler?

 

i measured the oil cooler today
the seating area was just about 70-72mm(hadnt had pot of coffee yet)
i think you MIGHT be able to seat a gasket with diam of 75mm but thats pushing it.

 

Thanks Steve. The larger gasket is 2.83" or 71.88mm. Looks like it will be close.

 

The other alternative might be to use the oil cooler from the Prelude, it is larger. Someone correct me if I am wrong, but I think that it will work.

BTW, I also have one for sale IM me if you are intersted