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Old 11-12-2013, 08:34 AM   #7
5th Gear Member

Join Date: Jul 2012
Vehicle: 1990 lx hatch 5.0
Location: ohio
Posts: 2,406

Replace/check your pcv valve if its pluged or not functioning the crank case can become over pressurized and push oil out the seal. Usually they don't leak when new, but that's not the rule lol . If it hasn't stopped leaking after a couple miles and the pcv is functioning properly then something happened to the seal when you installed it or the seal is just faulty. Im not familiar with national seal , I always use felpro.
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