Craigar Posted October 30, 2018 Share Posted October 30, 2018 (edited) The seal (as well as cam seals) appears to be original, (with "NOK" marking/label) and I don't know if this is a groove or maybe a stock ridge/shelf (about 1/8 inch away from radius) ? motor has 137K miles, wasn't leaking too severe and probably also leaking from cam seals and oil pump as well, resealing all of them Edited October 30, 2018 by Craigar details, details and typo ;) Link to comment Share on other sites More sharing options...
Len Dawg Posted October 30, 2018 Share Posted October 30, 2018 (edited) Looks like it sat for a long long time by the square markings... I would soak a small USED piece of scotch brite pad in new oil and clean a little. Edited October 30, 2018 by Len Dawg Suggestion.. Link to comment Share on other sites More sharing options...
Craigar Posted October 30, 2018 Author Share Posted October 30, 2018 (edited) The square markings are were the backside of the sprocket butts against the crank, it's the "teeth" of the sprocket. The seal rides at least 3/16 inch further back (or more towards the top of this image). Here I slid the sprocket back on so it visually makes more sense. I think this groove is a max of .005 " at the deepest - which is towards the back (closest to top of image) right before the brownish "varnish" band. Now that I am seeing it in the day I realize it's probably not a problem . Thank You Edited October 30, 2018 by Craigar add images & details Link to comment Share on other sites More sharing options...
GeneralDisorder Posted October 30, 2018 Share Posted October 30, 2018 Looks fine. Run it. GD Link to comment Share on other sites More sharing options...
jono Posted October 30, 2018 Share Posted October 30, 2018 New seals from Subaru are still NOK and will be softer and seal well on the groove worn into metal surfaces by old hardening seals. I agree with GD Link to comment Share on other sites More sharing options...
Craigar Posted November 1, 2018 Author Share Posted November 1, 2018 (edited) Didn't get one marked NOK - but got one that looks like NOS from czny , otherwise the seal looks identical to the stock one - and everything looks right including the little angled "oil deflection ridges" going towards the lip, which I assume "pushes" oil back towards the motor? (I - was NOT impressed with O'riely's "National" generic with no "deflection ridges" . The crankshaft seal from czny looks just like the cam seals I got out the 20 year old "last gen" box of seals a reputable full time "Subaru only" mechanic I was considering for this job (Raffi Motors ), he's the one offered to do it all for $1000, and said that's more than the cars worth.. probably true - but if I get another 100k (or more without major problems) I'll be real happy! Here's how I seated the seal.. got it level and flush with the case - used the old seal as a spacer while I very slowly turned the ratchet with my other thumbnail in the gap (at the edge) between the pair of seals and double thick reader glasses watching it move. and I KNOW it's level! Edited November 1, 2018 by Craigar more details... 1 Link to comment Share on other sites More sharing options...
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