From theleft side top. Iam selling the car and while I've noticed it somewhat before a buyer noticed it today. Not loud and more pronounced at start up. Thoughts? Would Lucas help?
Thanks

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2000 A4 1.8l Quattro 5 speed

Start with a Seafoam treatment - it can work wonders. If it's a tap because you are not getting full valve lubrication, Seafoam may break the blockage away. The 1.8T is known for oil sludge, and Seafoam will be your best friend.

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99 2.8QM

here's a noob question.... How do you seafoam the engine?

Hit up the Search feature up top - type in "seafoam 1.8t" and you'll get about four trillion threads. Also, either on www.audiworld.com or www.audidiy.com there is a tech article for the 1.8T that shows step by step what to do.

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99 2.8QM

So, I ran Seafoam through the engine. While it was in there the noise went away. After 70 miles I did an oil change & now the noise is back. I would think that with the oil so thin the noise would have been worse with Seafoam in the oil. Any insights???

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2000 A4 1.8l Quattro 5 speed

bump

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2000 A4 1.8l Quattro 5 speed

No.

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01 A4 1.8T Quattro Sport
Eibach, Hotchkis, Upsolute, Borla

I'll see what a qt of Lucas does for it tomorrow.

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2000 A4 1.8l Quattro 5 speed

Tapping is caused by an exhaust leak like a crack in the header, also could be a worn belt or pulley.

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DEPO Headlights - 8000k HIDs - 3000k Hi-beams
Forge 007 DV - Custom "U-Pipe" intake - Custom 3" exhaust
Smoked markers - Kamei grille - Painted lowers
S4 front bumper - S4 brakes - S4 wheels - S4 tails ...all done on EBAY

Nothing.

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01 A4 1.8T Quattro Sport
Eibach, Hotchkis, Upsolute, Borla