Mined leaked when I bought it. (170k) The leak never changed through 2 valve cover replacements, one felpro one OEM.
After 50k more miles it finally started dripping on the floor.
I took the rear main retainer and the front oil pump/retainer off for both crank seals and both O rings behind both retainers.
I resealed both pans, retainers, new flex plate and bolts, new timing belt tensioner and a new belt. Among other things.
My seals were all original grey fipg.
I noticed a significant oil pressure increase on the dash gauge.
My gauge would be close to one quarter all the time. Now it flutters around half at anything above 900 rpm. This wasn't because I was loosing a ton on the ground. I never really added oil between changes. I don't go over 5k with that.
I think the o rings are important, and overlooked.
I did not order the 350$ reseal toyota kit. But everything is in there. I just looked to see if the o rings were there, they are.
I just didn't need most of that stuff as it's been done already.
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