I removed my cap to try and soften my shifts a little. After I turned the little "t", I replaced the cap then tested the line under the hood to ensure vacuum would hold. Sure enough, won't hold a vacuum anymore.

I believe I messed up the plastic cap on there. It's the white hard plastic cap, not the little black rubber one. Can I just silicone around this thing and hope for the best? Or did I over-adjust, causing failure internally?

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'90 300SE --- 173k miles --- (Odometer just stopped working!)

'85 Cali 300D --- 193500 miles --- (Second one) Sold Nov '10

'82 300TDT --- 236,xxx miles --- (My first one) Sold July '09