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wolfej1
Samba Member
Joined: August 15, 2005
Posts: 679
Location: North Royalton, Ohio
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 Posted: Sun May 15, 2011 5:18 am Post subject: Vacuum leak question |
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Was doing some tune up work on the 82 Westy yesterday and noticed that when I pinched the vacuum hose that runs between the s boot and the black breather unit that pugs into the hole on the top of the block - my engine vacuum kicked up 2 inches and the idle smoothed out noticeably.
Need to know if anyone has experienced this phenomenon, is this a normal occurance, etc...
To me gaining a solid 2 inches of vacuum at idle tells me something aint right. That extra 2 inches should be there all the time I would think.
Thanks
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1982 Westy
2004 KDX200
2008 Kawasaki KLR 650
1979 Yamaha DT 175
1995 Toyota 4Runner |
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Ahwahnee
Samba Member
Joined: June 05, 2010
Posts: 9810
Location: Mt Lemmon, AZ
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| Posted: Sun May 15, 2011 7:44 am Post subject: |
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| My uneducated observation -- if you could put you hand partially blocking the air intake wouldn't that increase vacuum? Could that effect be the same as what you're seeing (as the part you describe sounds like it is sucking crankcase fumes)? |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50352
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| Posted: Sun May 15, 2011 8:04 am Post subject: |
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| You may have an air leak into the crankcase that is causing a lean run condition. Maybe a shot valve cover gasket. |
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wolfej1
Samba Member
Joined: August 15, 2005
Posts: 679
Location: North Royalton, Ohio
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| Posted: Sun May 15, 2011 12:59 pm Post subject: |
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| Wildthings wrote: |
| You may have an air leak into the crankcase that is causing a lean run condition. Maybe a shot valve cover gasket. |
nah..new gaskets in place....
_________________
1982 Westy
2004 KDX200
2008 Kawasaki KLR 650
1979 Yamaha DT 175
1995 Toyota 4Runner |
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