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Blew crank seal... how?

960 Views 4 Replies 2 Participants Last post by  Weiyan8
I just found out that I have a blown crank seal. I just put a new short block in and the crank seal was new. What would cause it to blow so soon? I only have ~1400 miles on the block and just started boosting to 1bar. I'm pretty sure the boostin killed it, but why? I was only boosting 1bar and the seal was new. Does anyone have any experience with this? I don't want to put a new one in and blow it again. Any advice would be appreciated.
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Do you have a stock or raised rev limiter?
raised rev limiter

Hey Grant. I do have the rev limit raised to 7800rpm with a GForce ECU. I've only hit that once, but that was yesterday and I noticed the oil leaking after that. I was going around a corner in first and gunned it. My tires spun but not sure what it revved to. I don't think it even reached 7000rpm. Do you think I need to replace my PVC valve or at least clean it out? I don't think that was replaced when I had the engine done. Is there a way to prevent this from happening again? Thanks for your help.
While a new PCV valve might not be a bad idea, thats not the problem. The problem is that the stock oil pump generates too much oil pressure above the stock rev limiter. There is a way to modify the oil pump (oil return line I think) so that the pressure won't get to high, but I have absolutely no idea how. It has nothing to do with the amount of boost pressure you run.
Hey Grant. Thanks for the info. Do you know who I could ask that would know how to do this? I don't want to replace the crank seal only to have it blow again next time I rev it. Does anyone here know? Thanks.
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