All: You may remember my thread about a month ago regarding oil in spark plug chamber for cyl #5. Well I tackled the job at the time, and found a cracked oil seal (as expected) under the rear valve cover. In fact, the oil seal had worked its way out of the valve cover and had slid down along the spark plug tube.
Well... I waited a month and this evening pulled each of the rear plugs to check if my handy-work had held up and.... bad news... the seal for cylinder 5 (the same seal that had previously failed) has slid out of the valve cover groove again. When I did the job I used genuine Nissan parts and seated each of the three seals in the valve cover in an identical fashion. The other two seals I replaced look fine (as viewed from above the engine bay through the spark plug chamber with the coilpack removed).
I would be happy to admit installation error - but frankly, I'm not sure what I did wrong, since two of the seals are holding up fine and the same seal has failed again (within 1500 miles).
Any and all advice/suggestions are appreciated.
Nisstech - any thoughts on what I might have done wrong?
Thanks in advance.
Nirav
96 Max GLE, 118k