Where is oil filter housing gasket on 1997 Honda Accord 2.7, also where can I get one.

SOURCE: location of oil filter

Rear of motor under intake manifold acessable from under vehicle between fire wall and engine.

SOURCE: oil filter base plate

it does have an O ring buts its irregularly shaped. it is usually held on by 3 bolts(mine was). and the top most bolt was very close to my oil pressure sensor....(had to take it out to avoid breaking it) i needed a very short ratchet wrench and get it out. Make sure you get the ring from a Honda Dealership if you can.(i have bad luck with aftermarket parts on my Hondas).The reason why mine was spraying is because the baseplate was actually cracked. so i also had to buy a new one ( yes they have them too) O-ring 12.00 bucks baseplate was 39.00 bucks for me, might be a bit more for yours since your Honda is a little newer (mine was an 89 accord) oil filter baseplate or mountplate are some terms (so you were right on) hope this helps.

SOURCE: how to remove valve cover gasket on a 1998 honda accord

try removing the bolts hold on the valve cover and once you do that take a razor blade and a little lube and careful scrape the old one off.

SOURCE: oil on spark plug

no, not a blown headgasket, remove the valve cover and inspect the spark plug hole seals(tube seals in the valve cover) replace if brittle and old. also change the valve cover gasket since u have it off...adjust the valves as well

SOURCE: 98 honda accord oil pan gasket

Replace oil pan gasket, make sure not coming from behind timing belt cover first.