JimR

<center><img src="http://images5.fotki.com/v65/photos/7/77755/389799/A6TimingBeltParts-vi.jpg"></center><p>
I've posted this before, but it is now updated with exact ETKA part names and numbers, so I thought it worth posting again as a fresh thread.

Numbers are for a '99 A6q with engine code AHA. No claims of full accuracy, verify everything, past results are no guarantee of future performance, your mileage may vary, all the standard disclaimers.

A6 (C5) 2.8 30V Timing Belt Replacement

Must do items - parts list.

Timing Belt
--------------------------------------
Timing Belt 078 109 119 (unsure of letter suffix)
Timing Belt Relay Roller 078 109 244 H
Timing Belt Tensioning Damper 078 109 479 E
Timing Belt Tensioning Roller 078 109 243 R


Water Pump
--------------------------------------
Water pump 078 121 004 J
Water pump gasket included with above (078 121 043 A)
Thermostat 078 121 113 F
Thermostat round seal N 901 368 02

Other items to consider - parts list

Ribbed Belt
--------------------------------------
Ribbed V-Belt 078 903 137 BC
Belt Tensioning Damper 078 903 133 AB


Seals
--------------------------------------
cam adjuster seals 058 198 217
Four cam oil seals 026 103 085 D (x4)
Valve cover gasket set 078 198 025

front crank oil seal 054 115 147 B
sealing flange gasket 078 115 189 H

I paid about $500 for all of the above.

Links / References
------------------------------------------------
<a href="https://forums.audiworld.com/a6/msgs/277883.phtml">Good pic of bumper removed, engine open</a>

<a href="https://www.audiworld.com/tech/eng39.shtml">1999 A6 2.8 Timing Belt and Water Pump Replacement from Audiworld Tech Section</a>

<a href="https://forums.audiworld.com/a4/msgs/750523.phtml">Timing Belt and Water Pump Replacement comments.</a>

<a href="http://www.audiquattroparts.com/engines%20and%20transmissions/timing_belt_kit.htm">Timing Belt parts kits and alignment tool rental from Blaufergn?gen! Inc.</a>

<a href="https://forums.audiworld.com/a4/msgs/1742406.phtml">99.5 A4 2.8 30v Timing belt change completed ... lots of pics</a>

<a href="https://forums.audiworld.com/a6/msgs/291499.phtml">Timing Belt Repair (AWA6 Forum Thread)</a>

<a href="https://forums.audiworld.com/allroad/msgs/105861.phtml">RMcQ Procedure: allroad 2.7T Timing Belt Replacement</a>

A6Q99.5

Do you by chance know if AHA has an ISV? I am planing on cleaning my throttle body, and in the process do a couple of other inspection. I dont' know if this engine has ISV or not. I suppose I really should go get a copy of Bently.

JimR

I don't think so.