Car Fix DIY Videos

Changing the timing belt, water pump, thermostat etc. on your Audi UrS4 or UrS6 2.2 might seem like a bit of a daunting task but it’s not as scary as you might think as long as you have the right tools.

The most important specialty tool used in the timing belt replacement is the damper pulley locking Tool # 3256. It is unique to the 1992-95 S4/S6 with the AAN. You’ll want to obtain this tool first or find someone that will loan it to you.

For our U.S. based viewers, here is a full list of things to do (and where to get them) while you’re in there.

Coolant Flange at rear of block, aluminum – https://shop.efi-motorsport.com/collections/audi-urs4-urs6-aan/products/audi_i5_coolant_flange-_rear_of_block

Billet coolant tee at rear of engine – https://shop.efi-motorsport.com/collections/audi-urs4-urs6-aan/products/billet_coolant_tee_urs4_-_urs6_aan_fitment

Billet thermostat housing for AAN engines – https://shop.efi-motorsport.com/collections/audi-urs4-urs6-aan/products/billet_aan_thermostat_housing
OR if you want a stock new plastic housing – https://www.fcpeuro.com/products/audi-engine-coolant-thermostat-housing-s4-s6-vag-074121121b

I5 hardened timing gear cog – https://shop.efi-motorsport.com/collections/audi-urs4-urs6-aan/products/audi_i5_hardened_timing_belt_cog_gear

Serpentine belt tensioner (if yours is shot) – https://shop.efi-motorsport.com/collections/audi-urs4-urs6-aan/products/serpentine-tensioner-audi-aan-spec

Timing Belt Kit (with Graf water pump. Hepu or Graf have both been fine for me) – https://www.fcpeuro.com/products/audi-timing-belt-and-water-pump-kit-s4-s6-s4s6kit

Serpentine Belt – https://www.fcpeuro.com/products/audi-alternator-drive-belt-s4-s6-6k1693

Thermostat (87D) – https://www.fcpeuro.com/products/audi-vw-engine-coolant-thermostat-06a121113

I run the “period correct” Pentosin NF antifreeze mixed 50/50 with distilled water. Your choice may vary here but be sure to properly flush the system if you’re switching between different coolant types. The important part for the AAN is that it is phosphate free.
https://www.fcpeuro.com/products/nf-engine-coolant-antifreeze-g001100-15l