Sorry Should have said it's an '85 Coupe Q non turbo with no vacuum pump. Iain -----Original Message----- From: David G [mailto:daveglu@hotmail.com] Sent: 13 November 1999 18:14 To: Iain Atkinson Subject: Re: Loud mettalic tapping from top of engine. You don't mention what car, but if you have the mechanical vacuum pump it is likely that. Dave http://www.pelkie.com/mycars.htm