S2000 Under The Hood S2000 Technical and Mechanical discussions.

krank vent problems

Old Oct 16, 2007 | 10:27 AM
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Default krank vent problems

Like the tittle says i'm having some problems with my krank vents. The larger one of the two (the one at the front of the valve cover) is getting stuck for some reason, and they cause my car to have strange humm. Ive heard of people that hear a popping sound, but this is a constant hmmmmmmmmm. Maybe its normal, I dont know, but its a bit annoying. As for it getting stuck, has anyone else had this problem?

Andres
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Old Oct 16, 2007 | 11:04 AM
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Do you still have a vacuum in the crank case?
(does the dip stick still makes a hisssss when you pull it out staight after driving?)

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Old Oct 16, 2007 | 11:16 AM
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still have planty of vacuum!
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Old Oct 16, 2007 | 11:42 AM
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You may want to check the spark plugs too.
Not the plugs, but the area around them and the coils.
They should be dry, no oil should make it down there.
Oil may short out a coil (and give you a CEL)
If there is engine oil there a (the) valvecover seal(s) is (are) leaking
Has happened before with Krankvents.
IIRC there is a "seal-fix", but I don't know what that is.. to be honest.

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Old Oct 16, 2007 | 11:59 AM
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Thanks for the help, but I changed all the seals for the valve cover recently (like 500 miles ago) including the four around the plug holes. There isnt oil anywhere.
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Old Oct 16, 2007 | 12:06 PM
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the vacuum is so great, its sucking air past a seal... you need to find that leak, if you want the noise to go away...
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Old Oct 16, 2007 | 12:09 PM
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whats the best way for me to go about finding the leak?
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Old Oct 16, 2007 | 12:11 PM
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Originally Posted by DRE.,Oct 16 2007, 03:09 PM
whats the best way for me to go about finding the leak?
listen to spitfire and check your seals that seal the spark plug tubes to the valve cover. I would take the valve cover off and make sure everything is looking good and re-install the cover.
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Old Oct 16, 2007 | 12:16 PM
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I already replaced all the seals associated with valve cover including the four for the spark plug holes. I also changed my plugs and coils on Friday (diagnosing another problem) and they were free of any oil. My assumption therefor, is that the leak is not coming from the valve cover. Where else should I be looking?
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Old Oct 16, 2007 | 12:23 PM
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the connector that the front KV goes to, maybe its leaking at that connection. It might be leaking from the seal around the valve cover... the one that mounts to the head.
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