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Old 27-01-2007, 07:19 PM   #2 (permalink)
waynne
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Car: A3 1.8T Sport
 
Join Date: Nov 2005
Location: Deal, Kent UK
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Sounds like a dodgy sensor to me. The tappetts will rattle until they get coated in gunk again - some slick 50 or X1 superlube will help keep the rattle down.

I would unplug and replug everything in again including air feed pipes just to be on the safe side. The buzzing noise implies a short across a relay or switch. Keep revs to below 3000 for the first 300 miles while you are bedding things in - I'm assuming the bottom end and engine below the head gasket are not touched.

There could be an oil pressure issue as well - you really should keep an eye on the oil pressure with a gauge.
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