generac generator 18 hp v twin model#350445 leaking oil on start up

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  #1  
Old 03-08-13, 10:20 PM
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generac generator 18 hp v twin model#350445 leaking oil on start up

This generator I bought used, it has an oil leak on start up. I have already replaced the crankshaft seal, breather seal. i have performed a draw down test and doesn't seem like any air is getting by the rings. So when I start it up it starts slinging oil till it warms up, and stops. But it's seems like alot of oil, and dont want that oil to get in the generator. Does the breather assy need to be installed at start up? or can it stay off during leak testing? Any suggestion would HELP!
 
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Old 03-09-13, 12:04 AM
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Where is it slinging from?
 
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Old 03-19-13, 06:27 PM
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it appears to be coming out from behind the fly wheel. but I dont understand it stops once it warms up? Since my last post i went to the local shop, talk to a tech and he told me about the oil passage at the bottom behind the seal. So i pulled the seal again, checked that oil passage and it was clear. put in a new seal with a little permatex around the outside of the seal. waited till the next day after reinstalling flywheel and produce the same results. the oil builds on flywheel slinging everywhere. But when I shut it down it appears to be runnung right down from the seal. I wish I could start it without the flywheel.
 
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Old 03-20-13, 12:10 AM
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The oil shouldn't even be that high... is the oil level overfull? Is there side play in the crankshaft at the flywheel end?
 
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Old 03-22-13, 06:01 PM
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No there isn't any play. I'm disgusted with this whole thing. What gets me is that it stops once the engine warms up? what do you think about oil pressure?
 
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Old 03-22-13, 09:16 PM
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I can't see where oil pressure has anything to do with it. That seal should hold whatever oil pressure that engine can develop. How about the oil level? Does the oil smell like gas? The oil should not be high enough to even contact that seal when the engine is sitting unused.
 
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