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Check to see if you have installed the spacer when you installed your color wheel. The gap you are describing sounds like the area that the Black rubber form fitted spacer goes ?? It fits around the entire edge of the color wheel housing and when installed correctly fits snuggly down onto the base ...

I replaced the color wheel in my 3 1/2 year old HLR4667W with no problems. The replacement part (L3 chassis) was the BP96-00674A. It ran fine for about a month, at which time the 'zzzzzz' sound on shutdown began again. After another couple of weeks, the 'zzzzzz' sound remained at all times the set w...