I just bought a used 97 wrangler and lovin' it! Just started with an oil, air filter and spark plug change, and found a few concerns. First, it seems like there is excessive oil build up on the front of the motor. Not sure but maybe it needs a new valve or head gasket. Second, when i pulled the spark plugs the number 1 and a little of 2 plugs seemed to have a lot of build up on it (burned, or caked on, but not rich or flooded look). So there's my problem, any help would be great!