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Generators In this forum we will try to answer any of your questions about the different model generators that can be found on Blue Bird coach's.

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  #1  
Old 05-10-2011
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Default Kohler Yanmar Oil Drain Plug Torque Spec

Hi All,

Our Kohler/ Yanmar Powerboost generator continues to have a very slow oil leak from the oil drain plug. I got some advice from some wise folks at RATS regarding the tightening of it. But, like a lot of things, the thought of torquing that bolt too much freaks me out. Does anyone have a torque spec that I can use as a baseline? I could not find one in the operation and installation manual. Is it fair to assume if the right parts are used and torqued correctly with clean threads, there is another problem?

Hope I haven’t bugged too many of you with this issue already. I can't find any postings, but I keep thinking I wrote a couple. My memory is not what it used to be…

Thanks in advance for the help,

Mike
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Old 05-10-2011
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Default OIl Leak

Hey Mike,

Like most cars it is not the plug itself that leaks it is a worn out crush washer. Next time you change the oil go to the NAPA store and get one and then snug it up good and that should stop the drip. Had the same thing on my Ford truck w/ a powerstroke.
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Old 05-10-2011
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Hi Bryan,

When I first noticed the drip, I got a new OEM plug and nylon washer from the local Kohler dealer and replaced the original. The original washer I removed was slightly deformed, but didn't seem to really "crush" enough to make a good seal.

My biggest fear is going beyond what experienced Woggers consider snug and stripping out the threads.

Mike
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Old 05-10-2011
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Mike,

The Yanmar may be looking back and telling the Detroit that it would not be the only thing with an oil drip.
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Old 05-10-2011
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Quote:
Originally Posted by bryanaltier View Post
Mike,

The Yanmar may be looking back and telling the Detroit that it would not be the only thing with an oil drip.
Bryan,

LOL!!! You mean there is an engine in the back, too?

Mike
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Old 05-10-2011
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The complete service manual for Yanmar engines is in the forum's database files. I don't know if the drain torque specs are included but worth a check.

http://www.wanderlodgeownersgroup.co...ead.php?t=3304
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Old 05-10-2011
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Hi Bill and Rita,

Thanks for the link. I think there is every other torque rating listed, but not for the oil drain plug. The general bolt torque ratings listed on page 8-22 go up to an M16. This is an M22 slug.

Mike
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Old 05-10-2011
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Mike

I've had trouble before with drain plugs I switched them over to copper washers, PROBLEM SOLVED.
Get them at Napa,Pep Boys,etc
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Old 05-10-2011
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Mike,
I wish my Kohler/Perkins only had a slow leak
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