Hill,

Your vacuum readings sound fine and don't suggest a leak at the intake manifold gasket.

If you have a steady idle and you are pulling vacuum off the intake manifold of 5 or less, it may signal a possible vacuum leak at the intake manifold gasket.

For a very good source for vacuum guage readings and possible findings, check this source:

http://www.durranceeng.com/Vacuum%20Gauge%20Test.htm

Regards,

__________________
Regards,

Tom S.
1971 280SL Tunis Beige Metallic
1971 280SL Tobacco Brown (13K miles)
1970 280SL Deep Red
1994 E320 Cabriolet
1999 E320 Wagon 4Matic
2002 LX 470
1992 Land Cruiser